#help-0 | Mathematics | Page 803

surreal meadow Sep 17, 2021, 6:29 AM

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yes

eternal arrow Sep 17, 2021, 6:29 AM

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ok

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let me just write it down

surreal meadow Sep 17, 2021, 6:29 AM

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well make sure you understand it too

eternal arrow Sep 17, 2021, 6:31 AM

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ok.

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I don't think we learned about the (p=30 power rule

next haven Sep 17, 2021, 6:31 AM

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Bro

eternal arrow Sep 17, 2021, 6:31 AM

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I just need to know when to apply this

surreal meadow Sep 17, 2021, 6:32 AM

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$f(x) = ax^n \implies f'(x) = anx^{n-1}$

ocean sealBOT Sep 17, 2021, 6:32 AM

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maximo

surreal meadow Sep 17, 2021, 6:32 AM

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that's the power rule for derivatives

eternal arrow Sep 17, 2021, 6:32 AM

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awesome, that helps

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now i got to find the value of a

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do i just plug 2 into p and factorise the question?

surreal meadow Sep 17, 2021, 6:33 AM

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well you have p now

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so you can write the function in terms of a and x

eternal arrow Sep 17, 2021, 6:33 AM

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so now the question would be f(x) = a(x-(2))(x-3)

surreal meadow Sep 17, 2021, 6:33 AM

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and you know the point (0, -6) is part of the function

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so -6 = a * (0-2) * (0-3)

eternal arrow Sep 17, 2021, 6:34 AM

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so what would I write as my final answer>

surreal meadow Sep 17, 2021, 6:34 AM

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what is the question asking you to find?

eternal arrow Sep 17, 2021, 6:34 AM

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the value of a

surreal meadow Sep 17, 2021, 6:35 AM

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then what should the answer be?

eternal arrow Sep 17, 2021, 6:35 AM

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in the function

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wait let me think

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let me read what you wrote

surreal meadow Sep 17, 2021, 6:35 AM

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i was hoping you'd already done that

eternal arrow Sep 17, 2021, 6:35 AM

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ohhhh

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i understand

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Thank you

alpine sable Sep 17, 2021, 6:41 AM

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is this channel free?

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can someone explain Componendo-Dividendo?

sacred aurora Sep 17, 2021, 6:49 AM

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send question

alpine sable Sep 17, 2021, 6:56 AM

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He did

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Its some theorem on proportions

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https://www.toppr.com/guides/quantitative-aptitude/ratios-and-proportions/componendo-dividendo/

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maybe this might help

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can't find much about it

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Unless someone here knows it

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.

eternal arrow Sep 17, 2021, 7:05 AM

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im so lost on this question. Im so used to when p=0

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the question is let f(x) = px^2 + qx - 4p, where p =/=0. find the number of roots for the equation f(x) = 0. Justify your answer

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Wouldn't you use (-b^2)-4(a)(x)???

wooden pier Sep 17, 2021, 7:11 AM

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@eternal arrow are you referring to the discrimminant

eternal arrow Sep 17, 2021, 7:12 AM

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yes

wooden pier Sep 17, 2021, 7:12 AM

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The discriminant in this case would be q^2 - 2(p)(-4p)

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There is no x involved in the discriminant

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Ok i assum you arereferring to the equation b^2 -4ac for discriminant

eternal arrow Sep 17, 2021, 7:14 AM

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im not to sure

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thats why im asking the question lol

wooden pier Sep 17, 2021, 7:14 AM

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Can you post the full question

eternal arrow Sep 17, 2021, 7:15 AM

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the question is let f(x) = px^2 + qx - 4p, where p =/=0. find the number of roots for the equation f(x) = 0. Justify your answer

wooden pier Sep 17, 2021, 7:16 AM

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Is there no info on what q is

eternal arrow Sep 17, 2021, 7:16 AM

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no 😦

wooden pier Sep 17, 2021, 7:16 AM

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Oh

eternal arrow Sep 17, 2021, 7:17 AM

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Im printing questions from online so they’re pretty hard

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Sucks there isnt solutions

wooden pier Sep 17, 2021, 7:19 AM

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I'm sorry I don't know then

eternal arrow Sep 17, 2021, 7:21 AM

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?

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maybe q is just 1?

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That would probs work right?

wooden pier Sep 17, 2021, 7:23 AM

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I mean, you can't assume anything, but I think q is a constant here but idk what the constant is

eternal arrow Sep 17, 2021, 7:24 AM

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do you know anybody familiar with this type of question?

wooden pier Sep 17, 2021, 7:35 AM

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I'm sorry I don't

stark trail Sep 17, 2021, 7:38 AM

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,rotate

ocean sealBOT Sep 17, 2021, 7:38 AM

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Couldn't find an attached image in the last 10 messages.

surreal meadow Sep 17, 2021, 7:39 AM

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,rccw

ocean sealBOT Sep 17, 2021, 7:39 AM

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Couldn't find an attached image in the last 10 messages.

alpine sable Sep 17, 2021, 7:57 AM

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Så I did this following math problem

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And I got the same answer

toxic zephyr Sep 17, 2021, 7:58 AM

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eternal arrow do you know anybody familiar with this type of question?

tbh looks like theres insufficient information

alpine sable Sep 17, 2021, 7:58 AM

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Except for the fact Photomath added a C on the answer

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Doesn't C disappear in this context?

(F(X1) + C) -( F(X2) + C)

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Or have I missed something

split oriole Sep 17, 2021, 8:00 AM

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alpine sable

yes because it is indefinite integral

eternal arrow Sep 17, 2021, 8:01 AM

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bro we learn that in inequalities

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This is quadratics lmao

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Wait nvm

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XD

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Its 4AM where im from lmfao

stark trail Sep 17, 2021, 8:01 AM

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alpine sable Doesn't C disappear in this context? (F(X1) + C) -( F(X2) + C)

if it's $\int_{x_2}^{x_1}$ then you don't need the constant\
but if it's just $\int$ without upper and lower bounds then you need to put "+C" at the end

ocean sealBOT Sep 17, 2021, 8:01 AM

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Muzan Jackson

eternal arrow Sep 17, 2021, 8:02 AM

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Does this answer make sense?

neat merlin Sep 17, 2021, 8:02 AM

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But there is nothing to translate, just given an inq, ab = 1 and a, b >0

stark trail Sep 17, 2021, 8:02 AM

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eternal arrow

where's the answer?

eternal arrow Sep 17, 2021, 8:02 AM

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lol

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i just sent

stark trail Sep 17, 2021, 8:02 AM

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wait

surreal meadow Sep 17, 2021, 8:02 AM

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to expand on that $\int^{x_1}_{x_0} f(x) , dx = (F(x_1) + C)- (F(x_0) + C) = F(x_1) - F(x_0)$

ocean sealBOT Sep 17, 2021, 8:02 AM

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maximo

stark trail Sep 17, 2021, 8:03 AM

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eternal arrow i just sent

which question are you talking about

eternal arrow Sep 17, 2021, 8:03 AM

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the top

toxic zephyr Sep 17, 2021, 8:03 AM

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the one up top of page

stark trail Sep 17, 2021, 8:03 AM

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oh okay

eternal arrow Sep 17, 2021, 8:03 AM

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I havnt started number 4 yet

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I need help with that one

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its weird cuz im missing a key side for the formula

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toxic zephyr Sep 17, 2021, 8:05 AM

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apply sin rule

stark trail Sep 17, 2021, 8:06 AM

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eternal arrow

Try recalculate the discriminant

eternal arrow Sep 17, 2021, 8:06 AM

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im so confused on how in this particular question 🙁

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Gotta star it to remind myself to reciew this more for monday

toxic zephyr Sep 17, 2021, 8:07 AM

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11/sin(100)=DB/sin(59)

eternal arrow Sep 17, 2021, 8:08 AM

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Is this for angle your doing?

toxic zephyr Sep 17, 2021, 8:08 AM

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thats to get length DB

eternal arrow Sep 17, 2021, 8:08 AM

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Oh ok

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Wair so what would be the answer?

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@toxic zephyr

toxic zephyr Sep 17, 2021, 8:13 AM

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DB=11sin(59)/sin(100)

eternal arrow Sep 17, 2021, 8:14 AM

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so whats the calculation?

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whats the final answer? lol my sister is using my calc atm

toxic zephyr Sep 17, 2021, 8:15 AM

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9.57

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or so

eternal arrow Sep 17, 2021, 8:15 AM

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alr

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how about DC?

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what would i do with the side length now?

devout bronze Sep 17, 2021, 8:17 AM

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mb didnt know this was still being used

eternal arrow Sep 17, 2021, 8:17 AM

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lol its a dumb question but its late so lol

devout bronze Sep 17, 2021, 8:18 AM

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eternal arrow how about DC?

u can use the cosine rule

eternal arrow Sep 17, 2021, 8:18 AM

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what is it again?

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like the formula

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isnt like 2 multiply by cosdegrees then devide?

devout bronze Sep 17, 2021, 8:19 AM

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DC in ur case is a

eternal arrow Sep 17, 2021, 8:19 AM

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oh nvm

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thinking of smthn else

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can you plug what I have into the cosine rule?

alpine sable Sep 17, 2021, 8:19 AM

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stark trail if it's $\int_{x_2}^{x_1}$ then you don't need the constant\\ but if it's just $...

MUZAN

devout bronze Sep 17, 2021, 8:19 AM

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eternal arrow can you plug what I have into the cosine rule?

just search up "cosine rule" in google

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u can plug ur numbers in

eternal arrow Sep 17, 2021, 8:21 AM

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so x^2= 9.57 x 6 - 2(6)(9.57)cos82?

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right?

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@devout bronze

devout bronze Sep 17, 2021, 8:24 AM

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u forgot to square 9.57 and 6

eternal arrow Sep 17, 2021, 8:24 AM

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oh ok thx

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can you find the correct answer just in case if i do it wrong. i remember doing it last week and messing up on the square root part liek thus

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@devout bronze

devout bronze Sep 17, 2021, 8:28 AM

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eternal arrow can you find the correct answer just in case if i do it wrong. i remember doing ...

what part do u mean?

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u can put those values in a calculator and solve for x

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,w solve x^2 = 9.57^2 + 36 - 12*9.67 Cos(82)

ocean sealBOT Sep 17, 2021, 8:28 AM

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Results provided by WolframAlpha

Click here to refine your query online
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devout bronze Sep 17, 2021, 8:29 AM

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unless the value for db was wrong, this should be correct @eternal arrow

eternal arrow Sep 17, 2021, 8:31 AM

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i need to show my work though

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i wont have that calculator on my test, will i lol xD

devout bronze Sep 17, 2021, 8:31 AM

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well u should?

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but sure

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send me the working out

eternal arrow Sep 17, 2021, 8:33 AM

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i tried on a diff question and messed it up

eternal arrow Sep 17, 2021, 8:33 AM

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eternal arrow

look lol 😭

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it would really mean alot if you could do it so i know where I did wrong.

devout bronze Sep 17, 2021, 8:33 AM

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mate i dont know what im looking at

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take a pic of the whole thing

eternal arrow Sep 17, 2021, 8:34 AM

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exactly

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xD

devout bronze Sep 17, 2021, 8:34 AM

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its the angle

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take the pic again

eternal arrow Sep 17, 2021, 8:34 AM

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same cosine rule

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Its all wrong btw

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💀

devout bronze Sep 17, 2021, 8:35 AM

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what were u trying on the 4th line

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and what is the angle? u just wrote cos without an angle

eternal arrow Sep 17, 2021, 8:36 AM

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i dont rember

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tbh

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thats why i want to see how you answer it to see what i did wrong ):

devout bronze Sep 17, 2021, 8:36 AM

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alright bro

eternal arrow Sep 17, 2021, 8:37 AM

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thanks, i keep messing up at the square root part

undone holly Sep 17, 2021, 8:37 AM

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gas gas gas

devout bronze Sep 17, 2021, 8:39 AM

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@eternal arrow

eternal arrow Sep 17, 2021, 8:40 AM

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don't you have to get the variables by themselves or smthn though?

devout bronze Sep 17, 2021, 8:40 AM

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DC is the variable

eternal arrow Sep 17, 2021, 8:40 AM

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wait

devout bronze Sep 17, 2021, 8:40 AM

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the name a variable doesnt necessarily have to be one letter

eternal arrow Sep 17, 2021, 8:40 AM

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i was looking at thwe wrong question

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thanks btw

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Also this is the question I messed up on

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lol

stark trail Sep 17, 2021, 8:44 AM

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alpine sable MUZAN

NEZUKO CHAN

alpine sable Sep 17, 2021, 8:44 AM

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MUZAN!!

stark trail Sep 17, 2021, 8:44 AM

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NEZUKO CHANNN

alpine sable Sep 17, 2021, 8:45 AM

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dont kill tanjiro

devout bronze Sep 17, 2021, 8:45 AM

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eternal arrow

just base ur working off what i sent

stark trail Sep 17, 2021, 8:45 AM

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alpine sable dont kill tanjiro

dw
I'll postpone

raw folio Sep 17, 2021, 8:45 AM

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IF A(1,1) B(3,3) P(2,1) Q(3,2) are the points (coordinates) show that AB = 2PQ

alpine sable Sep 17, 2021, 8:45 AM

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stark trail dw I'll postpone

NO DONT KILL

stark trail Sep 17, 2021, 8:45 AM

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alpine sable NO DONT KILL

why

raw folio Sep 17, 2021, 8:45 AM

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nah

stark trail Sep 17, 2021, 8:45 AM

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I can do whatever I want

alpine sable Sep 17, 2021, 8:45 AM

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he is my brother

raw folio Sep 17, 2021, 8:45 AM

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tanjiro will kill muzan

alpine sable Sep 17, 2021, 8:45 AM

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raw folio tanjiro will kill muzan

Yes!!

raw folio Sep 17, 2021, 8:46 AM

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Muzan will then turn tanjiro into a demon and then tanjiro will almost kill nezuko-

alpine sable Sep 17, 2021, 8:46 AM

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NO SPOILERS

stark trail Sep 17, 2021, 8:46 AM

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raw folio tanjiro will kill muzan

oh yeah?
do you think he will successfully kill me?

raw folio Sep 17, 2021, 8:46 AM

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but then he gets turned back to human

alpine sable Sep 17, 2021, 8:46 AM

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I am waiting for season 2

raw folio Sep 17, 2021, 8:46 AM

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stark trail oh yeah? do you think he will successfully kill me?

the sun burns you to death so yeah

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good for you after killing pretty much all of the hashira -_-

stark trail Sep 17, 2021, 8:46 AM

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raw folio the sun burns you to death so yeah

dw I put a portion of my body parts at home so

alpine sable Sep 17, 2021, 8:46 AM

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stark trail oh yeah? do you think he will successfully kill me?

Ur weak KEK

stark trail Sep 17, 2021, 8:46 AM

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I'm alive

raw folio Sep 17, 2021, 8:47 AM

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No you dont lol

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you just died

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die*

stark trail Sep 17, 2021, 8:47 AM

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no

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no

raw folio Sep 17, 2021, 8:47 AM

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its in the manga

alpine sable Sep 17, 2021, 8:47 AM

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I can beat every lower moon and I dont even drink blood

stark trail Sep 17, 2021, 8:47 AM

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hmm

raw folio Sep 17, 2021, 8:47 AM

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alpine sable Ur weak<:KEK:586240877358350341>

ahem hes a lot stronger than your cute face

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solos the hashira

eternal arrow Sep 17, 2021, 8:48 AM

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wait

alpine sable Sep 17, 2021, 8:48 AM

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raw folio *ahem hes a lot stronger than your cute face*

NO

raw folio Sep 17, 2021, 8:48 AM

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raw folio IF A(1,1) B(3,3) P(2,1) Q(3,2) are the points (coordinates) show that AB = 2PQ

someone help

alpine sable Sep 17, 2021, 8:48 AM

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NEvER

raw folio Sep 17, 2021, 8:48 AM

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alpine sable NO

YES

alpine sable Sep 17, 2021, 8:48 AM

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NO

stark trail Sep 17, 2021, 8:48 AM

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alpine sable I can beat every lower moon and I dont even drink blood

lol u can't even fight the fifth lower demon

raw folio Sep 17, 2021, 8:48 AM

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She is stronger than upper 6

alpine sable Sep 17, 2021, 8:49 AM

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stark trail lol u can't even fight the fifth lower demon

its bc I was going easy

raw folio Sep 17, 2021, 8:49 AM

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No its cuz you had a lousy weak ass

alpine sable Sep 17, 2021, 8:49 AM

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Imagine if I drank blood, I would be stronger than every demon

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but i dont bc im kind

raw folio Sep 17, 2021, 8:49 AM

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No akaza destroys you

alpine sable Sep 17, 2021, 8:49 AM

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DONT SPOIL

raw folio Sep 17, 2021, 8:49 AM

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kokushibo spits on you to your death

alpine sable Sep 17, 2021, 8:49 AM

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HEY

raw folio Sep 17, 2021, 8:49 AM

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and muzan pushes you with his finger and you die

stark trail Sep 17, 2021, 8:49 AM

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lol

alpine sable Sep 17, 2021, 8:49 AM

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I didnt see season 2

raw folio Sep 17, 2021, 8:49 AM

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no its not spoilers just saying they can destroy you

alpine sable Sep 17, 2021, 8:49 AM

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And no manga

alpine sable Sep 17, 2021, 8:50 AM

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raw folio no its not spoilers just saying they can destroy you

oh okey

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My pfp used to be Acnologia

eternal arrow Sep 17, 2021, 8:50 AM

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is this the questions channel or the manga channel lmfaooo

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😄

raw folio Sep 17, 2021, 8:50 AM

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anything but the roblox channel

eternal arrow Sep 17, 2021, 8:50 AM

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jk ❤️

alpine sable Sep 17, 2021, 8:50 AM

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Lmao

eternal arrow Sep 17, 2021, 8:50 AM

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lmfao this isn't my main account

stark trail Sep 17, 2021, 8:50 AM

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eternal arrow is this the questions channel or the manga channel lmfaooo

lol

eternal arrow Sep 17, 2021, 8:51 AM

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my brothers :/

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anyways

alpine sable Sep 17, 2021, 8:51 AM

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Nezuko is the best

stark trail Sep 17, 2021, 8:51 AM

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alpine sable its bc I was going easy

u lie

alpine sable Sep 17, 2021, 8:51 AM

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no

raw folio Sep 17, 2021, 8:51 AM

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nah she was weaker than lower 5 that time

eternal arrow Sep 17, 2021, 8:51 AM

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y'all watch demon slayer alot?

raw folio Sep 17, 2021, 8:51 AM

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later on shes stronger than uppre 6

stark trail Sep 17, 2021, 8:51 AM

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You're clearly weaker than my spider boy

alpine sable Sep 17, 2021, 8:52 AM

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I just watched season 1, thats all

stark trail Sep 17, 2021, 8:52 AM

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eternal arrow y'all watch demon slayer alot?

no

eternal arrow Sep 17, 2021, 8:52 AM

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what's y'alls fav anime?

alpine sable Sep 17, 2021, 8:52 AM

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stark trail You're clearly weaker than my spider boy

ok wannabe micheal jackson

eternal arrow Sep 17, 2021, 8:52 AM

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lol

stark trail Sep 17, 2021, 8:52 AM

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eternal arrow what's y'alls fav anime?

Death note

alpine sable Sep 17, 2021, 8:52 AM

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eternal arrow what's y'alls fav anime?

Demon slayer and seven deadly sins

eternal arrow Sep 17, 2021, 8:52 AM

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death note is probs mine as well

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and dragon ball super because Im biase about it

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was watching it religuosly every saturday when it was coming out

raw folio Sep 17, 2021, 8:53 AM

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eternal arrow what's y'alls fav anime?

it would be either demon slayer or naruto

eternal arrow Sep 17, 2021, 8:53 AM

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i feel like uzumaki is better then shipuden

alpine sable Sep 17, 2021, 8:53 AM

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I should have killed Sanemi

eternal arrow Sep 17, 2021, 8:53 AM

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would you agree or no? I feel like i enjoyed uzumaki more

raw folio Sep 17, 2021, 8:53 AM

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eternal arrow i feel like uzumaki is better then shipuden

what uzumaki its just naruto there is no uzumaki

eternal arrow Sep 17, 2021, 8:53 AM

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like uzumaki is just friendly vibes all around while shipuden is just like idk, medium

raw folio Sep 17, 2021, 8:53 AM

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nah in my opinion shippuden is more hype

eternal arrow Sep 17, 2021, 8:54 AM

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like the one when he was a kid

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fights are better

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in shipuden

raw folio Sep 17, 2021, 8:54 AM

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yup itachi torturing sasuke for days very friendly

eternal arrow Sep 17, 2021, 8:54 AM

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you can't say shippuden is more happy vibes then the original

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xD

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ohh you watch hunter x hunter?

raw folio Sep 17, 2021, 8:55 AM

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i did

alpine sable Sep 17, 2021, 8:55 AM

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Which hashira do you guys like the most

raw folio Sep 17, 2021, 8:55 AM

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manga too

eternal arrow Sep 17, 2021, 8:55 AM

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change my mind. i liuke it more then dragonball

raw folio Sep 17, 2021, 8:55 AM

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alpine sable Which hashira do you guys like the most

Giyuu tomioka yessir

alpine sable Sep 17, 2021, 8:55 AM

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hmm

raw folio Sep 17, 2021, 8:55 AM

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i feel like hes loved by most ppl

alpine sable Sep 17, 2021, 8:55 AM

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Sanemi is interesting

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But a dickhead

raw folio Sep 17, 2021, 8:55 AM

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i also like sanemi

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his mother was a demon

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that is why hes like that

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he had to kill his mother

eternal arrow Sep 17, 2021, 8:56 AM

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id say GYOMEI HIMEJIMA

alpine sable Sep 17, 2021, 8:56 AM

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Oh

raw folio Sep 17, 2021, 8:56 AM

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oh

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hes also good

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hes the strongest hashira

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the only problem hes not that cool-

alpine sable Sep 17, 2021, 8:56 AM

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WHY DID U SPOIL

eternal arrow Sep 17, 2021, 8:56 AM

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why do you think i picked him lmfao

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dw i agree

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hes not as cool as the others lol

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anyways

raw folio Sep 17, 2021, 8:56 AM

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yeah

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rengoku also reallllyyy good

eternal arrow Sep 17, 2021, 8:56 AM

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can y'all help me answer this question?

eternal arrow Sep 17, 2021, 8:57 AM

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raw folio rengoku also reallllyyy good

❤️

alpine sable Sep 17, 2021, 8:57 AM

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its unfortunate a upper 3 killed rengoku

eternal arrow Sep 17, 2021, 8:57 AM

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Lol guys xD

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Almost done ):

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took an all nighter to study

raw folio Sep 17, 2021, 8:58 AM

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alpine sable its unfortunate a upper 3 killed rengoku

yeh but tenjiro kills him later on

alpine sable Sep 17, 2021, 8:58 AM

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Be like me and sleep

alpine sable Sep 17, 2021, 8:58 AM

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raw folio yeh but tenjiro kills him later on

Yay

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Man all the moons are cool af

eternal arrow Sep 17, 2021, 8:58 AM

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cant because i dont have time to study on the weekends

alpine sable Sep 17, 2021, 8:58 AM

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Demon slayer's animation is awesome

eternal arrow Sep 17, 2021, 8:58 AM

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do y'all know how to answer my question though?

alpine sable Sep 17, 2021, 8:59 AM

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Which grade u in?

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im askin bc of the question paper

eternal arrow Sep 17, 2021, 8:59 AM

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11

lusty ibex Sep 17, 2021, 9:00 AM

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when shinobu died...

eternal arrow Sep 17, 2021, 9:00 AM

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i print out questions from online

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cuz im on online school

true sierra Sep 17, 2021, 9:00 AM

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Is that geometry?

eternal arrow Sep 17, 2021, 9:00 AM

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trig

true sierra Sep 17, 2021, 9:00 AM

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Or trig?

raw folio Sep 17, 2021, 9:00 AM

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alpine sable Man all the moons are cool af

nah upper 5 is despicable

true sierra Sep 17, 2021, 9:00 AM

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Gotcha

eternal arrow Sep 17, 2021, 9:00 AM

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can you help me answer it?

raw folio Sep 17, 2021, 9:01 AM

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upper 5 was Zenitsu's senpai

eternal arrow Sep 17, 2021, 9:01 AM

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i messed up my calculations

raw folio Sep 17, 2021, 9:01 AM

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they had the same teacher

true sierra Sep 17, 2021, 9:01 AM

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Sorry my trig is really rusty.

raw folio Sep 17, 2021, 9:01 AM

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and then kaigaku(upper 5) turned into a demon

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and zenitsu's teacher commited sepuku

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and died

lusty ibex Sep 17, 2021, 9:01 AM

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akaza's back story was hella sad

raw folio Sep 17, 2021, 9:01 AM

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ikr

lusty ibex Sep 17, 2021, 9:01 AM

#

charlie

raw folio Sep 17, 2021, 9:01 AM

#

upper 2 was evil

#

but cool

eternal arrow Sep 17, 2021, 9:02 AM

#

ye whats up?

lusty ibex Sep 17, 2021, 9:02 AM

#

waht ru trying to solve for

#

the length?

#

length ac?

eternal arrow Sep 17, 2021, 9:02 AM

#

acb angle

#

then AB side length

muted furnace Sep 17, 2021, 9:04 AM

#

@eternal arrow

https://www.onlinemathlearning.com/triangle-questions.html

I think it’s the sine rule for this one

www.onlinemathlearning.com

Sine Rule, Questions on Triangles (examples, solutions, worksheets,...

How to use the Sine Rule or Cosine Rule to find missing sides or angles, law of sines, law of cosines, A Level Maths

eternal arrow Sep 17, 2021, 9:04 AM

#

hmm. i just need help answering. If i will be quite honest with you im so tired that it would mean alot if someone would just answer it so I could understand and know how to apply it in the futue

lusty ibex Sep 17, 2021, 9:05 AM

#

#

just plug it into your calc and u good

#

i solved for ac length bc ab is given

eternal arrow Sep 17, 2021, 9:07 AM

#

alr

#

i still need help on the one before though. also thanks ,3

#

❤️

lusty ibex Sep 17, 2021, 9:08 AM

#

ohhh i thought u ment the other question mb

eternal arrow Sep 17, 2021, 9:09 AM

#

ye i already did that one lol

lusty ibex Sep 17, 2021, 9:09 AM

#

is length c b

eternal arrow Sep 17, 2021, 9:09 AM

#

xD

lusty ibex Sep 17, 2021, 9:09 AM

#

i cant see it properly

alpine sable Sep 17, 2021, 9:09 AM

#

#

could someone tell me what they get for 'c'

lusty ibex Sep 17, 2021, 9:09 AM

#

no becasue you didnt read how to get help

eternal arrow Sep 17, 2021, 9:09 AM

#

lusty ibex Sep 17, 2021, 9:09 AM

#

this queston taken buddy

eternal arrow Sep 17, 2021, 9:09 AM

#

Dont look at the right

#

lmao thats weong

#

XD

lusty ibex Sep 17, 2021, 9:09 AM

#

13.6 is bc yea?

eternal arrow Sep 17, 2021, 9:10 AM

#

No no

#

I messed it all up

#

I messed up the formula I think

lusty ibex Sep 17, 2021, 9:10 AM

#

on the actual triangle

eternal arrow Sep 17, 2021, 9:10 AM

#

Oh ye

#

It is

lusty ibex Sep 17, 2021, 9:12 AM

#

eternal arrow Sep 17, 2021, 9:13 AM

#

hmm

lusty ibex Sep 17, 2021, 9:13 AM

#

youve learnt that formula yea?

eternal arrow Sep 17, 2021, 9:13 AM

#

i dont think so ;/

lusty ibex Sep 17, 2021, 9:13 AM

#

well for area of a non right angle triangle

#

its 1/2absinc

#

with that you can find c

eternal arrow Sep 17, 2021, 9:14 AM

#

this is for the angle of ACB

#

not area

lusty ibex Sep 17, 2021, 9:14 AM

#

yep

#

you find the angle of c

#

hence the inverse sin

eternal arrow Sep 17, 2021, 9:14 AM

#

so how will i use what you got with C for the final answer lol

untold tapir Sep 17, 2021, 9:14 AM

#

formula

#

wait sry its already posted

#

i didnt notice sry

lusty ibex Sep 17, 2021, 9:15 AM

#

if im being honest bro i havent done this sort of basic trig in 2 years

eternal arrow Sep 17, 2021, 9:15 AM

#

hmm

lusty ibex Sep 17, 2021, 9:15 AM

#

but i cant really explain how

eternal arrow Sep 17, 2021, 9:15 AM

#

honestly its fine ,3

#

your awesome ❤️

lusty ibex Sep 17, 2021, 9:15 AM

#

sry

eternal arrow Sep 17, 2021, 9:15 AM

#

no no

#

its fine

#

i got like one last question and im done i think

lusty ibex Sep 17, 2021, 9:16 AM

#

arent u on 2 week break?

#

as of today?

untold tapir Sep 17, 2021, 9:16 AM

#

lusty ibex

did you divide 2?

eternal arrow Sep 17, 2021, 9:16 AM

#

i wish 😦

#

im off tmrw

lusty ibex Sep 17, 2021, 9:16 AM

#

ah

eternal arrow Sep 17, 2021, 9:16 AM

#

aka today

#

i didnt go to bed lmao

#

#

Will be done after this last question

#

its straight forward but need the calculations to study from

lusty ibex Sep 17, 2021, 9:18 AM

#

gimmie 5 min

eternal arrow Sep 17, 2021, 9:18 AM

#

sure dude

untold tapir Sep 17, 2021, 9:20 AM

#

lusty ibex

um you didnt multiply 1/2

tacit kernel Sep 17, 2021, 9:20 AM

#

Are they equal?

untold tapir Sep 17, 2021, 9:20 AM

#

no, unless c=0

#

and $a \neq 0$

tacit kernel Sep 17, 2021, 9:21 AM

#

Is this one equal?

ocean sealBOT Sep 17, 2021, 9:21 AM

#

andrewkong972

untold tapir Sep 17, 2021, 9:21 AM

#

yes, but a cannot be equal to c

#

because then the denominator will be 0

tacit kernel Sep 17, 2021, 9:22 AM

#

Ooh

eternal arrow Sep 17, 2021, 9:22 AM

#

wait. i keep getting error on my calc when caculating c^2= 25+64-2(8)(5)cos 175

#

can somebody calculate it for me. Do't forget to square root

#

gotta use the bathroom

#

be right back

lusty ibex Sep 17, 2021, 9:23 AM

#

#

tacit kernel Sep 17, 2021, 9:24 AM

#

If I have this fraction, and I want to have the - sign outside of the fraction. What will it be?

untold tapir Sep 17, 2021, 9:24 AM

#

$-\frac{2ab-3cd}{a-c}$

ocean sealBOT Sep 17, 2021, 9:24 AM

#

andrewkong972

tacit kernel Sep 17, 2021, 9:24 AM

#

Ooooh

#

So the denominator doesn't change

#

Thank you so much

untold tapir Sep 17, 2021, 9:25 AM

#

yeah but you can change it if you want to

tacit kernel Sep 17, 2021, 9:25 AM

#

untold tapir yeah but you can change it if you want to

How?

untold tapir Sep 17, 2021, 9:25 AM

#

$-\frac{-2ab+3cd}{-a+c}$

ocean sealBOT Sep 17, 2021, 9:25 AM

#

andrewkong972

untold tapir Sep 17, 2021, 9:26 AM

#

basically divide -1

#

but if you change the denominator and numerator at the same time then it will stay the same

tacit kernel Sep 17, 2021, 9:27 AM

#

Ooh thanks

coral inlet Sep 17, 2021, 9:29 AM

#

Hello, I was wondering

#

What would be the sign of

#

√x⁶

#

When it comes out of the radical as x³

untold tapir Sep 17, 2021, 9:30 AM

#

$\pm x^3$ like this?

ocean sealBOT Sep 17, 2021, 9:30 AM

#

andrewkong972

eternal arrow Sep 17, 2021, 9:30 AM

#

Im back

#

oh did you send it willy v

coral inlet Sep 17, 2021, 9:31 AM

#

ocean seal **andrewkong972**

Yeah that's what I thought. But my book uses one or the other, in different cases.

#

Like In this one.

#

untold tapir Sep 17, 2021, 9:33 AM

#

hmm sus

eternal arrow Sep 17, 2021, 9:34 AM

#

@lusty ibex

#

Which one is c and d lol 😂

lusty ibex Sep 17, 2021, 9:34 AM

#

oh

eternal arrow Sep 17, 2021, 9:34 AM

#

Also i like your hand writing

lusty ibex Sep 17, 2021, 9:34 AM

#

you are actually the first person to like my handwringing LMAOO

eternal arrow Sep 17, 2021, 9:35 AM

#

Ye it looks like a proffesors

#

very math like 😎

lusty ibex Sep 17, 2021, 9:35 AM

#

i seee

coral inlet Sep 17, 2021, 9:35 AM

#

untold tapir hmm sus

Any ideas?

eternal arrow Sep 17, 2021, 9:35 AM

#

Yes sir nike goku

#

💀

lusty ibex Sep 17, 2021, 9:35 AM

#

where i wrote f(4)

#

thats the next question

eternal arrow Sep 17, 2021, 9:35 AM

#

C?

lusty ibex Sep 17, 2021, 9:35 AM

#

yea

#

and then there is sorta like a gap

eternal arrow Sep 17, 2021, 9:36 AM

#

#

Also this is the last oage

#

Super straight forward

#

im just taking a look at your calcs

#

i gotta a big test on monday that I gotta review for

lusty ibex Sep 17, 2021, 9:36 AM

#

you got this 😂 im in a valorant ranked

#

oh damn

eternal arrow Sep 17, 2021, 9:36 AM

#

sheesh bro

#

U fyna hop on today?

#

Added u

lusty ibex Sep 17, 2021, 9:37 AM

#

uhhh i only queue with my mates

eternal arrow Sep 17, 2021, 9:37 AM

#

💀

#

its alr

#

anyways. Which ones d?

lusty ibex Sep 17, 2021, 9:38 AM

#

the one after the coordinate

eternal arrow Sep 17, 2021, 9:38 AM

#

Oh wait its the same on the second one

#

Ye you just scrolled down from it

#

I see

coral inlet Sep 17, 2021, 9:38 AM

#

You two, can you look at my problem pls?

lusty ibex Sep 17, 2021, 9:38 AM

#

√x⁶

#

so simplifying squareroot x^8?

eternal arrow Sep 17, 2021, 9:39 AM

#

Ye send it maya?

#

il take a look

#

Im just trying to get willy to send the calcs to the questions so I can review it.

#

I got no solutions so if I mess up i review smthn thats wrong lol

coral inlet Sep 17, 2021, 9:40 AM

#

coral inlet What would be the sign of

Read this message

eternal arrow Sep 17, 2021, 9:40 AM

#

Iv been up like 6 hours studying 😂

#

What do you mean?

#

like what is that sign?

coral inlet Sep 17, 2021, 9:41 AM

#

Yes

#

What sign will x³ be

lusty ibex Sep 17, 2021, 9:41 AM

#

maya is that little / a divide

eternal arrow Sep 17, 2021, 9:41 AM

#

wait il brb. Mom calling

coral inlet Sep 17, 2021, 9:41 AM

#

lusty ibex maya is that little / a divide

Where

#

In the pic?

lusty ibex Sep 17, 2021, 9:42 AM

#

tbh i was ass at surds

untold tapir Sep 17, 2021, 9:42 AM

#

coral inlet Any ideas?

the only thing i can think of is maybe they want -3x^3/-x^3 to be positive rather than negative?

lusty ibex Sep 17, 2021, 9:42 AM

#

gimmie an integral volume of solids differential equation or derivaative i can help

coral inlet Sep 17, 2021, 9:44 AM

#

untold tapir the only thing i can think of is maybe they want -3x^3/-x^3 to be positive rath...

Yes that statement is correct, but why is (x^3)negative and not postive, or both, in the answer. If both were correct, there should be two parts of the answer. One where it's positive first and then negative in the second part.

coral inlet Sep 17, 2021, 9:44 AM

#

lusty ibex gimmie an integral volume of solids differential equation or derivaative i can h...

Sorry not there yet.

coral inlet Sep 17, 2021, 9:45 AM

#

coral inlet Yes that statement is correct, but why is (x^3)negative and not postive, or both...

One more thing, if x approaches postive infinity, instead of the negative infinity, the answer is 3. Not -3(as in the case x approaches negative infinity).

eternal arrow Sep 17, 2021, 9:47 AM

#

Im back

#

you finish the questions will? Also those 4 are the last ones

#

also thanks for the explanations and sent work

#

@lusty ibex

coral inlet Sep 17, 2021, 9:48 AM

#

<@&286206848099549185>

eternal arrow Sep 17, 2021, 10:01 AM

#

@lusty ibex

#

Lol

#

Thanks anyways I guess. Im guessing you hopped off

unique ingot Sep 17, 2021, 10:21 AM

#

#

why is the first q a positive but the second is a negative?

#

does q depend on the state of p?

gray gorge Sep 17, 2021, 10:22 AM

#

I think it's a typo

unique ingot Sep 17, 2021, 10:22 AM

#

it's like this for all the solutions

#

for some reason

devout sigil Sep 17, 2021, 10:22 AM

#

Do u have the full qn?

#

The ones including to find p, q and r

unique ingot Sep 17, 2021, 10:23 AM

#

Q3

#

Sorry for the circles

devout sigil Sep 17, 2021, 10:24 AM

#

Ye there’s an error in the solutions to (b)

gray gorge Sep 17, 2021, 10:24 AM

#

Yeah the solution to b has a typo

unique ingot Sep 17, 2021, 10:24 AM

#

oh okay, thanks!

junior ore Sep 17, 2021, 10:27 AM

#

how do you sub say 6x-x^2 into first princples

#

i see u can do 6(x+h) - (x+h)^2 -6x+x^2 all over h

#

but i dont understand where this part: 6(x+h) - (x+h)^2 is derived

#

from firsts principle

glass elm Sep 17, 2021, 10:30 AM

#

hello @oak chasm , good day

#

sorry if you busy but if you free , possible us to continue ?

#

we learn limit yesterday, can we move to derivative now ? [or any topic, as per your choice related, you wil know better ]

junior ore Sep 17, 2021, 10:36 AM

#

glass elm we learn limit yesterday, can we move to derivative now ? [or any topic, as per ...

i assume u cant answer my ques then

glass elm Sep 17, 2021, 10:37 AM

#

junior ore i assume u cant answer my ques then

oh, first principle of finding derivative ?

junior ore Sep 17, 2021, 10:37 AM

#

yes

glass elm Sep 17, 2021, 10:37 AM

#

i not understand it completely but i know the formula is -
lim h_> 0 f(x+h) - f(x)/h

junior ore Sep 17, 2021, 10:37 AM

#

yes

glass elm Sep 17, 2021, 10:37 AM

#

what do you want to find ?

#

if i know i try

junior ore Sep 17, 2021, 10:38 AM

#

^

#

what i wrote on top

glass elm Sep 17, 2021, 10:38 AM

#

6x-x^2

junior ore Sep 17, 2021, 10:38 AM

#

yes

glass elm Sep 17, 2021, 10:38 AM

#

You want to find derivatrive?

#

of this?

#

or is that the function ?

#

that you want to put in the formula ?

#

what you want ?

junior ore Sep 17, 2021, 10:39 AM

#

yes find the derivative of that

glass elm Sep 17, 2021, 10:39 AM

#

ohh

junior ore Sep 17, 2021, 10:39 AM

#

through first principals

#

nvm

glass elm Sep 17, 2021, 10:39 AM

#

okay look

junior ore Sep 17, 2021, 10:39 AM

#

i just understood it lol

#

but yes

#

u explain

#

i think i do

glass elm Sep 17, 2021, 10:39 AM

#

first of all

#

6x - x^2

#

you see the six?

#

We take it out side

junior ore Sep 17, 2021, 10:40 AM

#

righh

glass elm Sep 17, 2021, 10:40 AM

#

Then we put d/dx separatelt

#

6 d/dx (x) - d/dx x^2

#

derivative of x is 1

#

6 * 1 - derivative of x^2

junior ore Sep 17, 2021, 10:40 AM

#

this is through first principle?

glass elm Sep 17, 2021, 10:40 AM

#

Derivative of x^2 is 2x

#

6-2x

#

uhh

#

for first principle

#

Let me fit it in formula

#

one min

junior ore Sep 17, 2021, 10:41 AM

#

thanks

glass elm Sep 17, 2021, 10:42 AM

#

okay, look

#

what is your tending value?

junior ore Sep 17, 2021, 10:43 AM

#

0

#

first principle is always to 0

#

right?

glass elm Sep 17, 2021, 10:43 AM

#

but there is the input value

#

i meant input sorry

#

what you want x to be?

junior ore Sep 17, 2021, 10:44 AM

#

huh

glass elm Sep 17, 2021, 10:44 AM

#

Like sometime it ask
Find derivative of 6x-x^2 at x = 4

#

What that value of x?

#

h is always tend to 0 but you need input value

junior ore Sep 17, 2021, 10:44 AM

#

lol its ok ok

#

i got it

#

thankss

glass elm Sep 17, 2021, 10:44 AM

#

oh nvm then

#

soryr though

#

i am bad at this first principle

junior ore Sep 17, 2021, 10:45 AM

#

do u need help knowing what derivative is?

glass elm Sep 17, 2021, 10:45 AM

#

i not good at explaining

junior ore Sep 17, 2021, 10:45 AM

#

its alright

glass elm Sep 17, 2021, 10:45 AM

#

oh i have someone who explain it to me

#

but they maybe busy now i dont know

junior ore Sep 17, 2021, 10:46 AM

#

well derivative is just the rate of change between two poins

#

points

#

so kind of a fancy word for gradients

junior ore Sep 17, 2021, 10:47 AM

#

glass elm oh i have someone who explain it to me

https://www.khanacademy.org/math/ap-calculus-ab/ab-differentiation-1-new/ab-2-1/v/derivative-as-a-concept

Khan Academy

Derivative as a concept (video) | Khan Academy

Introduction to the idea of a derivative as instantaneous rate of change or the slope of the tangent line.

#

watch this its very good

#

u can also watch the first video on the left if u need

glass elm Sep 17, 2021, 10:48 AM

#

i try yes

#

but i dont understand properly those

junior ore Sep 17, 2021, 10:49 AM

#

glass elm but i dont understand properly those

u mean u dont understand the video?

glass elm Sep 17, 2021, 10:50 AM

#

junior ore u mean u dont understand the video?

and even books

junior ore Sep 17, 2021, 10:50 AM

#

wow

glass elm Sep 17, 2021, 10:50 AM

#

not understanding

#

i know the laws

junior ore Sep 17, 2021, 10:50 AM

#

well

glass elm Sep 17, 2021, 10:50 AM

#

but i don;'t know many things

junior ore Sep 17, 2021, 10:50 AM

#

have u watched the video yet?

glass elm Sep 17, 2021, 10:50 AM

#

only basic

#

i have

#

before

#

if its from khanacamdey ur talking about

junior ore Sep 17, 2021, 10:50 AM

#

yes

#

its pretty good n

#

explanation*

low jewel Sep 17, 2021, 10:51 AM

#

junior ore so kind of a fancy word for gradients

err ure not wrong but not right, gradient is just one use of a derivative

#

theres other uses as well

junior ore Sep 17, 2021, 10:51 AM

#

yeah true

#

idk if u can help this guy

glass elm Sep 17, 2021, 10:53 AM

#

forget it lol

#

i think chai t rex too busy

eternal arrow Sep 17, 2021, 11:23 AM

#

#

#

Can somebody please help me do these last 4 questions? Finished everything before it so just use what I sent ):

#

@pulsar aspen you told me to pin you here right?

pulsar aspen Sep 17, 2021, 11:31 AM

#

Yes, please wait while I'm still answering someone else's answer

tepid ferry Sep 17, 2021, 11:31 AM

#

Anyone know how to make a program which only writes out the odd numbers from 1-100 in python?

eternal arrow Sep 17, 2021, 11:32 AM

#

Alr just please hurry. I need to review this asap

pulsar aspen Sep 17, 2021, 11:32 AM

#

tepid ferry Anyone know how to make a program which only writes out the odd numbers from 1-1...

Another channel, please

junior ore Sep 17, 2021, 11:32 AM

#

tepid ferry Anyone know how to make a program which only writes out the odd numbers from 1-1...

u still need help?

tepid ferry Sep 17, 2021, 11:35 AM

#

Yeah

junior ore Sep 17, 2021, 11:35 AM

#

aight well

#

like what u want to do?

#

do u just solely want to print the odd numbers from 1-100

tepid ferry Sep 17, 2021, 11:36 AM

#

Yeah

junior ore Sep 17, 2021, 11:36 AM

#

have u heard of if statements?

dire whale Sep 17, 2021, 11:36 AM

#

tepid ferry Anyone know how to make a program which only writes out the odd numbers from 1-1...

for n in [1,50]{
print 2*n-1
}

junior ore Sep 17, 2021, 11:36 AM

#

if and elef

dire whale Sep 17, 2021, 11:36 AM

#

do the proper tabbing

rigid wind Sep 17, 2021, 11:36 AM

#

range(a,b,c) - starts from a, ends at b-1, step is c

#

for i in range(a,b,c)

tepid ferry Sep 17, 2021, 11:37 AM

#

If and elef?

junior ore Sep 17, 2021, 11:37 AM

#

dire whale for n in [1,50]{ print 2*n-1 }

i think thats a bit complex

#

if and elif*

tepid ferry Sep 17, 2021, 11:37 AM

#

Yeah we just stared with it

junior ore Sep 17, 2021, 11:37 AM

#

and u want to use a for loop

tepid ferry Sep 17, 2021, 11:38 AM

#

Started

dire whale Sep 17, 2021, 11:38 AM

#

oh sorry

tepid ferry Sep 17, 2021, 11:38 AM

#

Yeah

junior ore Sep 17, 2021, 11:38 AM

#

rigid wind `for i in range(a,b,c)`

u can do what this guy said

tepid ferry Sep 17, 2021, 11:38 AM

#

A loop

junior ore Sep 17, 2021, 11:38 AM

#

yes

#

so

glass geode Sep 17, 2021, 11:38 AM

#

#

anyone wanna help me on this

junior ore Sep 17, 2021, 11:39 AM

#

glass geode

this guy has a ques

#

pls pick another channel

glass geode Sep 17, 2021, 11:39 AM

#

oh mb

junior ore Sep 17, 2021, 11:39 AM

#

it alright

#

oh so

#

basicaly as i was saying

#

for i in range(1,101, 2)

#

print(i)

#

thats basically it

tepid ferry Sep 17, 2021, 11:40 AM

#

It says invalid syntax

junior ore Sep 17, 2021, 11:41 AM

#

oh well

#

have u added

#

the colon

#

after the for loop

#

that is important

#

as u need the indentation

tepid ferry Sep 17, 2021, 11:42 AM

#

Gimme a second

pulsar aspen Sep 17, 2021, 11:42 AM

#

tepid ferry It says invalid syntax

Please be quick. You have just buried another person's problem

tepid ferry Sep 17, 2021, 11:42 AM

#

My bad

#

Sorry

junior ore Sep 17, 2021, 11:42 AM

#

oh yeah

pulsar aspen Sep 17, 2021, 11:42 AM

#

I have told you earlier

junior ore Sep 17, 2021, 11:42 AM

#

he took someones elses

tepid ferry Sep 17, 2021, 11:43 AM

#

I’m very sorry and thanks dawd

junior ore Sep 17, 2021, 11:43 AM

#

all good

#

just be careful of taking someones ques next time

pulsar aspen Sep 17, 2021, 11:44 AM

#

eternal arrow <@503047891271680001> you told me to pin you here right?

I'm sorry for the other person that overtook your channel

#

Could you repost, please?

pulsar aspen Sep 17, 2021, 11:47 AM

#

eternal arrow <@503047891271680001> you told me to pin you here right?

I don't understand what you're struggling with

#

You have proved that f(x) = 3(x-1)^2, right?

#

You really just have to pattern match here

#

For the last question, do you know how to transform graphs, right?

#

||To reflect on x axis, you have g(x) = -f(x)||
||To translate a units to right and b units to up, you have g(x) = f(x-a)+ b||

eternal arrow Sep 17, 2021, 11:58 AM

#

I dont knkw how to transfom the graph

#

can you answer the last 3 questions and show the calc? Lmao im studying right now in english class

#

@pulsar aspen

pulsar aspen Sep 17, 2021, 12:10 PM

#

eternal arrow can you answer the last 3 questions and show the calc? Lmao im studying right no...

You literally just wrote 3(x-1)^2

#

You just have to compare with a(x-h)^2 + k

eternal arrow Sep 17, 2021, 12:19 PM

#

oh ok.

#

Then How do I do the last question though?

#

the transformation one

molten depot Sep 17, 2021, 12:26 PM

#

Hi! I'm doing research on an anatomical structure in the eye. More specifically, I'm calculating the surface area within an angular segment in a 3D space. I'm not a mathematician so I'm not familiar with proper nomenclature - bu imagine you have an irregular surface area - and need to properly describe it's "borders" in the top, bottom and sides. What do you call this "border"?

crisp grove Sep 17, 2021, 12:28 PM

#

molten depot Hi! I'm doing research on an anatomical structure in the eye. More specifically,...

we just call it the boundary

molten depot Sep 17, 2021, 12:35 PM

#

Sorry for the terrible picture, but this is what I mean (for clarification). I need to somehow describe that the coastline paradox increases the length of the top and bottom boundaries of this irregular figure with an increased resolution and thus the area A

crisp grove Sep 17, 2021, 12:42 PM

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I really don't think we have a specific name for borders on top,bottom and sides individually

molten depot Sep 17, 2021, 12:43 PM

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alright

short hemlock Sep 17, 2021, 12:43 PM

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Does anyone here know about Pythagorean theorem

molten depot Sep 17, 2021, 12:43 PM

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then i know that i'm not wrong in finding a creative way to specify specific borders on each side

short hemlock Sep 17, 2021, 12:44 PM

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short hemlock Does anyone here know about Pythagorean theorem

I got a test today on that

crisp grove Sep 17, 2021, 12:44 PM

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yeah, 'top' 'bottom' boundaries are actually a very ambiguous term in mathematics

short hemlock Sep 17, 2021, 12:45 PM

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Rn I got a 72 in the class so if I fail this it will be bad because if I'm failing anything I might be put in tutoring

crisp grove Sep 17, 2021, 12:45 PM

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short hemlock Rn I got a 72 in the class so if I fail this it will be bad because if I'm faili...

then go study instead of wasting time on discord

short hemlock Sep 17, 2021, 12:45 PM

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Idk how to study

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I used to study with my dad

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I'm here rn at school

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Well

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School hasn't started yet

crisp grove Sep 17, 2021, 12:47 PM

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bruh

short hemlock Sep 17, 2021, 12:49 PM

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So I just like look over the info?

jade birch Sep 17, 2021, 12:51 PM

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What do you mean you don't know how to study? what

short hemlock Sep 17, 2021, 12:52 PM

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I'm bad at studying

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Wait I got a question for scientific notation

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Can the number be higher than 9

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The first number

jade birch Sep 17, 2021, 12:58 PM

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short hemlock Can the number be higher than 9

What?

junior talon Sep 17, 2021, 1:01 PM

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short hemlock Can the number be higher than 9

I mean it can be 9.1 but yeh if it was like 123 it'd be 1.23*10^2 not 12.3**10

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Hope I understood ye correctly

crisp grove Sep 17, 2021, 1:01 PM

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@junior talon don't answer bruh

junior talon Sep 17, 2021, 1:02 PM

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crisp grove <@115539876052467712> don't answer bruh

I'm not supposed to o-o?

crisp grove Sep 17, 2021, 1:02 PM

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short hemlock I got a test today on that

.

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he's cheating on his tests

junior talon Sep 17, 2021, 1:03 PM

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ouch, sorry.

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I also should've made sure this wasn't occupied, I apologize again.

short hemlock Sep 17, 2021, 1:06 PM

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No I'm not in trying to syudy

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Study

jade birch Sep 17, 2021, 1:06 PM

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@junior talon why delete?

junior talon Sep 17, 2021, 1:06 PM

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I went to question 3

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since I figured this was occupied

short hemlock Sep 17, 2021, 1:06 PM

#

#

molten depot Sep 17, 2021, 1:08 PM

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oh man

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what has the world come to

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math is fun when you get past the boring stuff and make an effort. the toolkit you get can make you rich

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think about it

orchid python Sep 17, 2021, 1:09 PM

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alpine sable Sep 17, 2021, 1:09 PM

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thinkies

orchid python Sep 17, 2021, 1:09 PM

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how can I simplify it

alpine sable Sep 17, 2021, 1:10 PM

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This differentiating from first principles?

orchid python Sep 17, 2021, 1:11 PM

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what should I do then?

jade birch Sep 17, 2021, 1:12 PM

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Is that missing a limit in front?

orchid python Sep 17, 2021, 1:12 PM

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no

alpine sable Sep 17, 2021, 1:12 PM

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Difference Quotient?

jade birch Sep 17, 2021, 1:13 PM

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~~oh wait~~ nvm :)

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pandaHmm

alpine sable Sep 17, 2021, 1:13 PM

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This computing the difference quotient right?

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Most likely

jade birch Sep 17, 2021, 1:14 PM

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Looks like limit definition of a derivative without the limit

alpine sable Sep 17, 2021, 1:14 PM

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All you do is substitute x+h for x

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In your function

jade birch Sep 17, 2021, 1:15 PM

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alpine sable All you do is substitute x+h for x

this is what I meant before I confused myself

alpine sable Sep 17, 2021, 1:15 PM

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Anyone good with stats online?

ocean sealBOT Sep 17, 2021, 1:16 PM

#

#

alpine sable Sep 17, 2021, 1:17 PM

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@orchid python y'gemme?

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Yes, no?

orchid python Sep 17, 2021, 1:17 PM

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what?

alpine sable Sep 17, 2021, 1:17 PM

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ocean seal

.

alpine sable Sep 17, 2021, 1:17 PM

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ocean seal

.

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You're doing single-variable calculus

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This is called the difference quotient

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ocean sealBOT Sep 17, 2021, 1:18 PM

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alpine sable Sep 17, 2021, 1:18 PM

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My answer is not correct. Can anyone point me to a YT vid that walks through a similar example

ocean sealBOT Sep 17, 2021, 1:19 PM

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alpine sable Sep 17, 2021, 1:19 PM

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you listening?

orchid python Sep 17, 2021, 1:20 PM

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i'm here now

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i was eating

alpine sable Sep 17, 2021, 1:20 PM

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🤔

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ok read what I sent

orchid python Sep 17, 2021, 1:20 PM

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ok

alpine sable Sep 17, 2021, 1:22 PM

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ok can you do it now?

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or you still confused?

amber iron Sep 17, 2021, 1:22 PM

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how do the 2 cross product formulas equal each other?

alpine sable Sep 17, 2021, 1:22 PM

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@orchid python

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k

final wind Sep 17, 2021, 1:24 PM

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Quick question how to solve this question .. A coin is thrown in a vertically upward direction with a velocity of 5ms−1. If the acceleration of the coin during its motion is 10ms−2 in the downward direction, what will be the height attained by the coin and how much time will it take to reach there ?

orchid python Sep 17, 2021, 1:25 PM

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i'm reading about difference qoutient

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if I am then confused I will ping you

alpine sable Sep 17, 2021, 1:26 PM

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ok might as well tell me cause i'm kinda waiting and your channel is being occupied

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https://media.discordapp.net/attachments/487651208048410627/807545463669653514/unknown.png

glass lichen Sep 17, 2021, 1:26 PM

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alpine sable https://media.discordapp.net/attachments/487651208048410627/807545463669653514/u...

pins

amber iron Sep 17, 2021, 1:27 PM

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In other words if you want to take the cross product a x b, how does absintheta = the matrix formula for the cross product?

jade birch Sep 17, 2021, 1:27 PM

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catthumbsup

glass lichen Sep 17, 2021, 1:28 PM

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amber iron In other words if you want to take the cross product a x b, how does absintheta ...

as written they dont

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since |a||b|sin(theta) is a scalar and axb is a vector

amber iron Sep 17, 2021, 1:28 PM

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well its absintheta going orthogonal

orchid python Sep 17, 2021, 1:29 PM

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how can I insert -x^2 + 3x to the function?

alpine sable Sep 17, 2021, 1:29 PM

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🤔

amber iron Sep 17, 2021, 1:29 PM

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so what's the proof that the scalar components match at least?

orchid python Sep 17, 2021, 1:29 PM

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to the formula

alpine sable Sep 17, 2021, 1:29 PM

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Lets move to a different channel Nam

orchid python Sep 17, 2021, 1:29 PM

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which one

alpine sable Sep 17, 2021, 1:30 PM

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i'll @ you there

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let Mosh and yk take this

amber iron Sep 17, 2021, 1:31 PM

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aka how does absin(theta) = sqrt((y1z2-z1y2)^2 + (y1x2-x1y2)^2 + (x1z2-z1x2)^2))

glass lichen Sep 17, 2021, 1:31 PM

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that's what Im trying to remember, yeah.

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this is not a good answer but:

It's known that the area of a triangle formed by vectors a and b is given by $\frac{1}{2}\norm{a\cross b}$, but it's also given by $\frac{1}{2}\norm{a}\norm{b}\sin(\theta)$

ocean sealBOT Sep 17, 2021, 1:37 PM

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Mosh

amber iron Sep 17, 2021, 1:41 PM

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mk

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I'm trying to understand why the determinant formula gives the area

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of the parallelogram

placid zinc Sep 17, 2021, 1:44 PM

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🔀

amber iron Sep 17, 2021, 1:48 PM

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Screen_Shot_2021-09-17_at_9.47.49_AM.png

burnt wharf Sep 17, 2021, 1:51 PM

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split oriole Sep 17, 2021, 1:55 PM

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burnt wharf

What is that e^x or ex?

burnt wharf Sep 17, 2021, 1:55 PM

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E power x

split oriole Sep 17, 2021, 1:58 PM

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burnt wharf E power x

And in denominator it is x^2?

burnt wharf Sep 17, 2021, 1:58 PM

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Yes

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Wait

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Let me send you the real photo

oak jewel Sep 17, 2021, 1:58 PM

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this looks different from what im used to, is it just a limiting x-> 0

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why eulers?

amber iron Sep 17, 2021, 2:00 PM

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nvm got it

burnt wharf Sep 17, 2021, 2:02 PM

#

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Next question

eternal arrow Sep 17, 2021, 2:04 PM

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Can somebody please help me solve this?

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Im so confused for C

amber iron Sep 17, 2021, 2:05 PM

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burnt wharf

are you sure the whole thing on the numerator is to the -1

burnt wharf Sep 17, 2021, 2:06 PM

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amber iron are you sure the whole thing on the numerator is to the -1

Yes sure

amber iron Sep 17, 2021, 2:06 PM

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the problem in and of itself is insane

zealous basalt Sep 17, 2021, 2:06 PM

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When people say f prime of something, what does it mean?

amber iron Sep 17, 2021, 2:06 PM

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derivative of f

zealous basalt Sep 17, 2021, 2:07 PM

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From my understanding the derivative is the rate of change?

eternal arrow Sep 17, 2021, 2:07 PM

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Can someone help me on the next question when you guys are finished answering him?

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been studying all night lol

burnt wharf Sep 17, 2021, 2:11 PM

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burnt wharf

Did any one got answer

eternal arrow Sep 17, 2021, 2:13 PM

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Y’all still busy?

ancient saddle Sep 17, 2021, 2:14 PM

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eternal arrow Im so confused for C

Hello, if a line it's tangent to a parabola, there is only one point of intersection of the line and a parabola

eternal arrow Sep 17, 2021, 2:14 PM

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I understand that but what do I write?

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Like I don’t know how to solve it

ancient saddle Sep 17, 2021, 2:14 PM

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How do you usually find the intersection of two curves/functions?

eternal arrow Sep 17, 2021, 2:15 PM

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😅

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i forgot honesrly

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Im literally just stuck on this lol

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😅

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And another question

ancient saddle Sep 17, 2021, 2:16 PM

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The intersection is the point where the x and the y values of both functions are equal

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so basically you want them to be equal

eternal arrow Sep 17, 2021, 2:16 PM

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So what would the answer be?

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been at this all night look

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Lol*

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Scroll up xad

ancient saddle Sep 17, 2021, 2:17 PM

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the equation f(x) = y must have only one solution

eternal arrow Sep 17, 2021, 2:17 PM

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What do I write xD

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This is a mock test thats a review for mondays test

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theres no way thats 8 marks

ancient saddle Sep 17, 2021, 2:19 PM

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ancient saddle the equation `f(x) = y` must have only one solution

try solving this equation and see what happens

eternal arrow Sep 17, 2021, 2:19 PM

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I dont know how lmao. Thats why i’m asking to see how you solve it so I can apply it in the future

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@ancient saddle

ancient saddle Sep 17, 2021, 2:21 PM

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do you know quadratic formula?

eternal arrow Sep 17, 2021, 2:22 PM

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Yes

burnt wharf Sep 17, 2021, 2:22 PM

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burnt wharf

???

eternal arrow Sep 17, 2021, 2:22 PM

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I dont thibk we apply it here though

ancient saddle Sep 17, 2021, 2:26 PM

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If you mean solutions for k, 2 and 3 are completely wrong

tidal sail Sep 17, 2021, 2:27 PM

#

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Can someone tutor me on this material

merry raft Sep 17, 2021, 2:27 PM

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guys, who can help me with this equation?

ancient saddle Sep 17, 2021, 2:28 PM

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eternal arrow I dont thibk we apply it here though

-x^2 + 5x - 6 = kx - 5

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Okay, but that's not what is being asked, that's why I wanted to clarify

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how? 🤔

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we have two function f(x) and y

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those are the solutions for f(x) = 0

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I said earlier that that's not what is being asked

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We want y = kx-5 to be tanget to f(x)

eternal arrow Sep 17, 2021, 2:32 PM

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This is why I left this question last

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Very confusing

ancient saddle Sep 17, 2021, 2:32 PM

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Then k=2 and k=3 are not solutions of the equation f(x) = y

eternal arrow Sep 17, 2021, 2:33 PM

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given, y= kx-5

Curve is y = f(x)

Slope is given as,
d/dx f(x)

equation of tangent touches to the curve at (a,b)

(y-b) = dy/dx (x-a)

y = dy/dx(x-a) + b

kx-5 = dy/dx(x-a)+b

Let, m = dy/dx at (a,b)

kx-5 = m(x-a)+b

kx-5 = mx-ma+b

kx-5 = mx-(ma-b)

m = k

ma-b = 5

ka-b = 5

k =(5+b)/a

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Would this work?

ancient saddle Sep 17, 2021, 2:33 PM

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Okay, just wanted to clarify that those are no solutions for the problem

ancient saddle Sep 17, 2021, 2:34 PM

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eternal arrow Would this work?

mmm you'd have to find a and b

eternal arrow Sep 17, 2021, 2:34 PM

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shucks..

ancient saddle Sep 17, 2021, 2:35 PM

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-x^2 + 5x - 6 = kx - 5
x^2 + (k-5)x + 1 = 0

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So we want this equation to have only one solution

eternal arrow Sep 17, 2021, 2:35 PM

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Final answer?

ancient saddle Sep 17, 2021, 2:36 PM

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ancient saddle `-x^2 + 5x - 6 = kx - 5` `x^2 + (k-5)x + 1 = 0`

use quadratic formula with this last equation and find a way there's only one solution

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try it and you will see

eternal arrow Sep 17, 2021, 2:36 PM

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Ye lmao

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Im waiting for my class to come back from iutside

#

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I wont be able to use desmos during a test lol

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I also had a question on this. Lmao I need the solution on this type of question

ancient saddle Sep 17, 2021, 2:37 PM

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$\frac{-b\pm\sqrt{b^2-4ac}}{2a}$ \
If we want only 1 solution, we need $b^2-4ac=0$

eternal arrow Sep 17, 2021, 2:38 PM

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ocean sealBOT Sep 17, 2021, 2:38 PM

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leonardogtf

eternal arrow Sep 17, 2021, 2:38 PM

#

#

Also what would be k here?

ancient saddle Sep 17, 2021, 2:39 PM

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from here you can do (k-5+2)(k-5-2)=0

eternal arrow Sep 17, 2021, 2:39 PM

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eternal arrow

.

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mostly need help on this question and solution

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Havnt used that larticular formula

blazing rose Sep 17, 2021, 2:40 PM

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lmao

eternal arrow Sep 17, 2021, 2:42 PM

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😅

ancient saddle Sep 17, 2021, 2:42 PM

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merry raft guys, who can help me with this equation?

Hello, just decompose them and solve the equation, there's only one unknown which is X

blazing rose Sep 17, 2021, 2:43 PM

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I dont understand this. do i just replace du with whats currently in the integral?

ancient saddle Sep 17, 2021, 2:44 PM

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blazing rose I dont understand this. do i just replace du with whats currently in the integra...

Yes because that's what you got, remember to change the limits of integration

blazing rose Sep 17, 2021, 2:44 PM

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so it would literally be

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the integral of du?

ancient saddle Sep 17, 2021, 2:45 PM

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yes

blazing rose Sep 17, 2021, 2:45 PM

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cool

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thanks

blazing rose Sep 17, 2021, 2:48 PM

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ancient saddle yes

correct?

ancient saddle Sep 17, 2021, 2:53 PM

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blazing rose correct?

Yes, that's correct

blazing rose Sep 17, 2021, 2:55 PM

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ancient saddle Yes, that's correct

Awesome. If I was to sketch a region equivalent to the integral from before, would this be it?

ancient saddle Sep 17, 2021, 2:57 PM

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blazing rose Awesome. If I was to sketch a region equivalent to the integral from before, wou...

That looks like the original one, I think you should draw the integral you got...

ancient saddle Sep 17, 2021, 2:57 PM

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blazing rose correct?

here

blazing rose Sep 17, 2021, 2:58 PM

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How would it be different

ancient saddle Sep 17, 2021, 2:58 PM

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blazing rose correct?

Here you are just integrating a constant function 1 from -pi/4 to pi/4

blazing rose Sep 17, 2021, 2:59 PM

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Oh so y = 1?

ancient saddle Sep 17, 2021, 3:00 PM

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yes

blazing rose Sep 17, 2021, 3:00 PM

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Ok great thank you

ancient saddle Sep 17, 2021, 3:00 PM

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the are is just a rectangle

slate mesa Sep 17, 2021, 3:00 PM

#

ancient saddle Sep 17, 2021, 3:00 PM

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blazing rose Ok great thank you

ok, you are welcome 👍🏽

slate mesa Sep 17, 2021, 3:01 PM

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where did i go wrong?

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answer says k=3

crisp grove Sep 17, 2021, 3:02 PM

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x²-(a+b)x+ab=0

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product is the constant term not the middle

slate mesa Sep 17, 2021, 3:02 PM

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omg

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😅

crisp grove Sep 17, 2021, 3:02 PM

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👍

alpine sable Sep 17, 2021, 3:06 PM

#

#

help

wary stream Sep 17, 2021, 3:07 PM

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alpine sable

Why does this look like an exam?

alpine sable Sep 17, 2021, 3:07 PM

#

practice test

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my sat exams on octiber

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october

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so im practicing by doing past tests

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can u help?

wary stream Sep 17, 2021, 3:08 PM

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Plug in 2k in the first equation

alpine sable Sep 17, 2021, 3:08 PM

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oh

wary stream Sep 17, 2021, 3:08 PM

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Then set the first equation equal to the second

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Find k

alpine sable Sep 17, 2021, 3:08 PM

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ok thanks

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cuz i remember solving a question similar to this before but i forgot how

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thanks anyway

rustic rock Sep 17, 2021, 3:11 PM

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how i can write zeta ?

alpine sable Sep 17, 2021, 3:12 PM

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wow tricky maths question!

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just have a hand spasm

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For this question how should I do this? It says find two distinct square roots of i, so I need to find a two numbers such that squaring it equal 1 right?

ocean sealBOT Sep 17, 2021, 3:12 PM

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crisp grove Sep 17, 2021, 3:15 PM

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alpine sable For this question how should I do this? It says find two distinct square roots o...

kind of yeah but that's the long way

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your answer should be +√i, try converting into a+ib form

blazing rose Sep 17, 2021, 3:16 PM

#

#

is this the correct set up

toxic island Sep 17, 2021, 3:17 PM

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yea

blazing rose Sep 17, 2021, 3:17 PM

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well now what do i do

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im stumped

alpine sable Sep 17, 2021, 3:17 PM

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solve the definite integral.

toxic island Sep 17, 2021, 3:18 PM

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nvm

blazing rose Sep 17, 2021, 3:18 PM

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oh

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oh again

toxic island Sep 17, 2021, 3:18 PM

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lol sry

blazing rose Sep 17, 2021, 3:18 PM

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so yeah im confused on what to do next

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nvm

crisp grove Sep 17, 2021, 3:20 PM

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using symmetry it'll be lot easier to solve

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u can shift the shaded region (0 to pi/24) to the interval (2π, 2π+π/4)

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so you'll get 2 bands,

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area of one of the band is again 2x the $\int_{\pi/4}^{\pi} sinx - \int_{\pi/4}^{\pi/2} cosx$

ocean sealBOT Sep 17, 2021, 3:24 PM

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Ryuzaki

glass onyx Sep 17, 2021, 3:29 PM

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Can anyone please help me solve this?

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Damn you’re a genius

vivid tiger Sep 17, 2021, 3:54 PM

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Show that $\nabla\phi$ is a vector perpendicular to the surface $\phi(x, y, z) = c$ where $c$ is a constant

ocean sealBOT Sep 17, 2021, 3:54 PM

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CoolShot

vivid tiger Sep 17, 2021, 3:54 PM

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hey guys could i get some help with this

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im not sure how to start this question tbh

rigid wind Sep 17, 2021, 3:58 PM

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isn't the gradient the zero vector in that case

eternal arrow Sep 17, 2021, 3:58 PM

#

#

Is this correct? Can somebody calculate the last row for me?

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Second last*

crisp grove Sep 17, 2021, 4:01 PM

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@vivid tiger take any path x(t),y(t),z(t) through a point on the surface

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then d ϕ/dt = p ϕ/px • dx/dt +... = 0

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so grad phi is perp to the curve

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as the path was arbitrary, so grad perpendicular to the surface

meager remnant Sep 17, 2021, 4:07 PM

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hi anyone knows what is the answer?

vivid tiger Sep 17, 2021, 4:16 PM

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oh

vivid tiger Sep 17, 2021, 4:17 PM

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crisp grove then d ϕ/dt = p ϕ/px • dx/dt +... = 0

yeah that makes sense

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ty

mortal void Sep 17, 2021, 4:18 PM

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is it free