#help-0

1 messages · Page 891 of 1

bleak ridge
#

Yeah

junior tartan
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2.69 rad means "2.69 radians"

vague iris
#

i thought it looks like something like 3pi/4 or something

bleak ridge
#

How many degrees is 3.1416 radians about

vague iris
#

I searched in google. is it 180 deg?

bleak ridge
#

Yes

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So whats the conversion rate

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From radians to degrees

vague iris
#

180/pi

bleak ridge
#

Yes

vague iris
#

Wait am i just gonna multiply the 2.69 to 180/pi?

bleak ridge
#

And they just want you to use 3.1416 for pi so what's the rate for this specific problem

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Also yeah

bleak ridge
#

Yeah

vague iris
#

Ohhh I get it now. Thanks!!

bleak ridge
#

Np

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And you're good with converting the decimal to dms right?

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Or no

bleak ridge
#

Epic

vague iris
#

thanks again

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/close

#

.close

lone heartBOT
#
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mighty berry
#

How would I even start this substitution? I cannot factor the ellipse equation and I cannot write x,y in terms of s,t

formal sentinel
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x^2+2xy+2y^2 almost looks like a perfect square

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Compute s^2 and you'll see it immediately

mighty berry
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Well, yes, but there's a 2 in front of the y^2

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Wait, is it s^2 + t^2?

bleak ridge
#

That sounds right

formal sentinel
#

It is

mighty berry
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Oh my god, I'm blind haha

#

Thank you!

#

.close

lone heartBOT
#
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formal sentinel
#

I hope that they didn't say the area was pi

lone heartBOT
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brazen cape
lone heartBOT
bright hedge
#

okay so

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you understand why the first line is what it is

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and now you understand what P = xy means

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right?

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instead of f(x) ur teacher just used P (i assume it means product)

smoky cloud
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what is that u need in the q ??

brazen cape
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yes i understand that much

bright hedge
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alright so

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in the first line she manipulated the equation to get x in terms of y

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so she had

brazen cape
bright hedge
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$x + y = 30 \implies x = 30 - y$

brazen cape
#

okay cool

bright hedge
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by subtracting x from both sides

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so then we wanted to maximize the product of the two numbers

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whcih was

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$P = xy$

ocean sealBOT
#

not discordmod

bright hedge
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but we know what x is in terms of y

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so we have

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uh

ocean sealBOT
#

not discordmod

bright hedge
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okay so we haev this

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so replace x in P with what it is interms of y

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so

bright hedge
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$P = (30-y) \cdot y$

ocean sealBOT
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not discordmod

bright hedge
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distribute

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$P = 30y - y^2$

ocean sealBOT
#

not discordmod

brazen cape
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oh okay

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and then she took the derivative

bright hedge
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so now we know that there will be a critical point where the derivative equals 0

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(in this case, because it is an upside down quadratic, the point we find will be the max)

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,w plot 30x - x^2

bright hedge
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we would be finding that max point

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so we take the derivative of bot hsides

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$\frac{d}{dy} P = \frac{d}{dy} 30y - y^2$

ocean sealBOT
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not discordmod

bright hedge
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which is

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$\frac{dP}{dy} = 30 - 2y$

ocean sealBOT
#

not discordmod

bright hedge
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we know that it will have a critical point where the derivative is 0

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so

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$0 = 30 - 2y$

ocean sealBOT
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not discordmod

bright hedge
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$2y = 30$

ocean sealBOT
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not discordmod

bright hedge
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$y = 15$

formal sentinel
#

didnt someone JUST ask about this x + y = 30, max(xy) = ?

ocean sealBOT
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not discordmod

bright hedge
formal sentinel
#

o

brazen cape
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sorry

bright hedge
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so yoyo

brazen cape
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okay awesome

bright hedge
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do you understand how i got to y = 15?

brazen cape
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yes

bright hedge
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okay cool

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so we know that it will be a max if

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$f''(x) < 0$

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or if the sign of the derivative changes around the number we found

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so in this case

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we can do

brazen cape
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in the opposite case would a min be at f"(x)>0

bright hedge
#

yers

brazen cape
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thats epic okay

bright hedge
#

but the second derivaitve tests fails sometimes so we have to check the sign around f'(x)

formal sentinel
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max is f''(x) < 0

bright hedge
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(the second derivative tests fails if f''(x) = 0

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oops

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yeah ur right

ocean sealBOT
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not discordmod

bright hedge
brazen cape
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fixed it

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thank you

bright hedge
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okay

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$\frac{d}{dy} \frac{dP}{dy} = \frac{d}{dy} 30 - 2y$

ocean sealBOT
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not discordmod

bright hedge
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this is

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$\frac{d^2P}{dy^2} = -2$

ocean sealBOT
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not discordmod

bright hedge
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so in this case the second derivative is always negative

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meaning that for y = 15, (the point we found) the second derivative is negative

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which means the point we found was a max

brazen cape
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if it were to equal zero would i just need to test around the critical point

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test pts

brazen cape
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great!! thank you so much that was very helpful

bright hedge
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you're welcome!

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would it be okay to close this?

brazen cape
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absolutely!

bright hedge
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happy to help 😄

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.close

lone heartBOT
#
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gilded vale
#

What happens when a log is an exponent?

lone heartBOT
formal sentinel
#

Well, $a^{\log_{a}b} = b$.

ocean sealBOT
formal sentinel
#

It's not too important here though

bright hedge
#

it is the same as

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$\frac{e^{\ln(3) \cdot \log_{2}(4 \sqrt{5})}{e^{\ln(3) \cdot \log_{2}(\sqrt{5})}$

ocean sealBOT
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not discordmod

$\frac{e^{\ln(3) \cdot \log_{2}(4 \sqrt{5})}{e^{\ln(3) \cdot \log_{2}(\sqrt{5})}$
```Compilation error:```! File ended while scanning use of \frac .
<inserted text> 
                \par 
<*> 328662734008745984.tex
                          
I suspect you have forgotten a `}', causing me
to read past where you wanted me to stop.
I'll try to recover; but if the error is serious,
you'd better type `E' or `X' now and fix your file.```
formal sentinel
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xd

bright hedge
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im struggling

formal sentinel
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It's a lot easier if you subtract the powers

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And use the division log role xd

bright hedge
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oh

formal sentinel
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I see what you did tho

bright hedge
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naw i was making it going to e

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then i was gonna subtract the powers

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xD

bright hedge
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so this is

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$3^{\log_2(4 \cdot \sqrt{5}) - \log_2(\sqrt{5})}$

ocean sealBOT
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not discordmod

bright hedge
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which then you can apply log rules

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(subtracting two logs is log of a quotient)

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so

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$3^{\log_2(\frac{4\cdot \sqrt{5}}{\sqrt{5}})}$

ocean sealBOT
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not discordmod

bright hedge
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which is

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$3^{\log_2(4)}$

ocean sealBOT
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not discordmod

bright hedge
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which is just 9.

gilded vale
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I’m confused about the 3log2

bright hedge
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which step

gilded vale
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Once you combine everything after you turned it into a subtraction

bright hedge
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$\log(x) - \log(y) = \log(\frac{x}{y})$

ocean sealBOT
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not discordmod

bright hedge
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this?

gilded vale
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Yeah

bright hedge
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this is kinda just a rule

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because you know how if you subtract powers of exponents, then you are dividing

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and because log() is the inverse of exponents its rules get flipped

gilded vale
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Oh wait I think I know why I’m confused, I think you wrote the step wrong there should be a three there right?

bright hedge
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no there shouldn't be a 3 there

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$\frac{a^b}{a^c} = a^{b-c}$

ocean sealBOT
#

not discordmod

bright hedge
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this is a rule for exponets

gilded vale
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So the only thing you’re doing is dividing the exponents

bright hedge
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yes

gilded vale
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And you don’t included the second 3 because they’re the same base??

bright hedge
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yes

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the only way you would include the second 3 if it was something like

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$\frac{3^4}{27^3}$

ocean sealBOT
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not discordmod

bright hedge
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then this would be

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$3^{4-3(3)}$

ocean sealBOT
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not discordmod

bright hedge
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because 27 is 3^3

gilded vale
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Ok I think I get it, I might get some extra help from my teacher but I get the basic idea thank you

bright hedge
#

you're welcome! is it okay to close this channel?

lone heartBOT
#

@gilded vale Has your question been resolved?

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honest umbra
#

I got b but apparently the answer is c?

lone heartBOT
chrome salmon
#

How?

honest umbra
#

nvm found my mistake have a good day

misty dagger
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Ok What you got

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lol

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I was about to say

honest umbra
#

when I was trying to find the velocity I multiplied by radius instead of circumference

misty dagger
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ok close it

honest umbra
#

have a good day guys

#

.close

lone heartBOT
#
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lone heartBOT
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alpine sable
lone heartBOT
alpine sable
#

Can someone write out and show me these 2 plz?

misty dagger
#

Just used a calculator lmao

alpine sable
#

@misty dagger ??

misty dagger
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Aren't you trying to graph it?

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-3 to 5 within x range

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Used calculator in y-graph. Just type -2abslxl

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From -3 to 5 range

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boom

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If your not allowed to used calculator on it, then i can tell you after

lone heartBOT
#

@alpine sable Has your question been resolved?

lone heartBOT
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alpine sable
#

@misty dagger I can use a calculator

alpine sable
#

I just don’t understand what u mean

misty dagger
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Ok I show you it real quick

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And make sure you look at your table for y

alpine sable
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Yeah I know how to do that

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Im@looking more for the evaluation

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Do u know how to do?

misty dagger
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Yea

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Oh shoot

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That give you answer

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Oh well

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Got any questions? I am about to go to bed.

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You can evaluate without a calculator, but I don't have times to do that since it's pretty late.

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But you can check your answers with calculator

lone heartBOT
#

@alpine sable Has your question been resolved?

lone heartBOT
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hazy stirrup
lone heartBOT
hazy stirrup
#

How do you do question 21b

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i've done 21a

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but i don't see how i can sub tan(a) and tan(b) into these equation

#

s

lone heartBOT
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@hazy stirrup Has your question been resolved?

hazy stirrup
#

what

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nice

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ok ty

gray isle
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sub/eliminate y

severe sluice
#

I ALREADY WARNED YOU BEFORE

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STOP.
POSTING.
ANSWERS.

alpine sable
#

What

hazy stirrup
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where di the 1/2y come from

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2nd line

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what

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still dont get why its x = 1/2 y

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wdym

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its ok if u don't get it

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i'll just wait for the next class

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no

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doesn't say

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ok

#

.close

lone heartBOT
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whole wadi
#

A line goes through points P (0, 2) and Q (a, 0) is parallel to the line y = 2x + 1. Determine the number a.

flat remnant
whole wadi
#

$2=\frac{0-2}{a-0}$

ocean sealBOT
#

Theophania

whole wadi
#

Is this correct?

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$2=\frac{-2}{a}$

gray isle
#

yes. than solve for a

ocean sealBOT
#

Theophania

whole wadi
#

a = -1

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Is the triangle right-angled, if the corners have the coordinates:
a) (-2, 3), (1, -5) and (6, 6)
b) (0, 0), (7, 4) and (2, 11)?

Motivate your answer.

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How can you tell?

flat remnant
#

find the angles of the sides of the triangle and see if they form a right angle

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a picture would help

whole wadi
flat remnant
#

great

whole wadi
#

$$\left(-2,3\right) = A$$
$$\left(6,6\right) = B$$
$$\left(1,-5\right) = C$$
$$m_{AB}=\frac{3-6}{-2-6}=\frac{-3}{-8}$$

ocean sealBOT
#

Theophania

flat remnant
#

good

ocean sealBOT
#

Theophania

#

Theophania

flat remnant
#

exactly

whole wadi
#

.close

lone heartBOT
#
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clear pivot
#
R on the set {1, 2, 3, 4, 5} defined by the rule (x, y) ∈ R if 3 divides x − y
clear pivot
#

Element of R = {(1,1),(1,4),(4,1),(2,2),(2,5),(3,3),(4,4),(5,2),(5,5)}

#

I just want to check with my answer. Am I correct ? Tq.

lone heartBOT
#

@clear pivot Has your question been resolved?

clear pivot
#

Hello Sam, thank you once again 😅

#

.close

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alpine sable
#

help

lone heartBOT
alpine sable
#

i dont need help with any of thhe questions themselves
i just need help understanding the equation
and the example
i got answers from tons of people ik but i dont feel comfortable turning in the work without actually learning it
been stuck on this for weeks and its due tmr 😭

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can someone explain step by step the example

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i rlly dont get it

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i tried to follow pendas but it turns out wrong

devout summit
alpine sable
#

i been on this for weeks

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its due tmr

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i love procrastinating

devout summit
#

I don't think calculation for this is that easy by hand

alpine sable
#

if i stick with PEMDAS i get this

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i can't go any further bc the numbers would be too small

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can you spot a mistake in the steps i made so far

devout summit
#

I think yes

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You wrote 1+(0.02/4) as 1.02/4

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While it should have been 4.02/4

alpine sable
#

LORD

#

lmaoooo

#

small mistake

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thhank you so much

#

.close

lone heartBOT
#
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lone heartBOT
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errant kernel
#

help

lone heartBOT
errant kernel
severe sluice
#

wait sorry

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alr occupied 😦

errant kernel
#

huh?

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oh sorry :(

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im just new

severe sluice
#

i was writing this before it was occupied

timid tinsel
#

a6-7b=?

errant kernel
#

Im really so so sorry

severe sluice
#

it's fine

#

im the one who should be sorry

#

its your channel

errant kernel
#

No no sorry i didnt know anything about this server im just new

severe sluice
#

you know the equation for a line, right?

#

i mean

#

for the question

errant kernel
# errant kernel

can someone help me? im stuck here and i still dont know how to solve this or answer its hard for me :)

severe sluice
#

yeah i can

errant kernel
#

:0

severe sluice
#

you know the equation for a line, right?

errant kernel
#

Yup

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but its kinda confusing me

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since my teacher doesnt teach us he just send a video

severe sluice
#

so you know how to find the slope of the line

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given the equation?

errant kernel
#

nope

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im sorry im to dumb yk

severe sluice
#

uh

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y=ax+b

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right?

errant kernel
#

oh yes

severe sluice
#

so a would be the slope
right?

#

(you remember that?)

errant kernel
#

yup

severe sluice
#

so i'm pretty sure you can just check of the first 2 columns now

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next up for the y-intercepts

errant kernel
#

oh wait i get it now

severe sluice
errant kernel
#

well my teacher send a video of that so i do get it i will just re watch it :D

severe sluice
errant kernel
#

ty for the help :> have a nice day!

#

Oh ok

#

.close

lone heartBOT
#
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cinder sundial
#

YY

lone heartBOT
cinder sundial
#

A and B are event, P(A)=3/8, P(B)=3/4, P(A∪B)=7/8

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the question asks for P(A' |B)

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i got 3/4 - 1/4 =2/4 as the answer

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that's what i had in my mind

placid zinc
#

P(A' | B)
= P(A' ∩ B) / P(B)
= [P(B) - P(A ∩ B)] / P(B)

#

So your Venn Diagram work is good, but don't forget that a division comes with the notation

cinder sundial
cinder sundial
#

oh i have to divide it by P(B)

#

P(A' |B) is when event B happens but i don't want the part when event B and event A both happens at the same time, right

cinder sundial
# cinder sundial

and in venn diagram it gonna looks like this, so here we got P(B)-P(A∩B)

vale wigeon
#

you calculated P(A' & B) rather than P(A' | B)

cinder sundial
#

symbol ∪ and symbol & having the same meaning in math, right

vale wigeon
#

no

#

also, "have" not "having"

cinder sundial
#

thank you

vale wigeon
#

∪ means union, ∩ means intersection

#

& is, in some sense, the same as ∩

cinder sundial
#

got it thank you

alpine sable
#

What is &? Never seen it used

cinder sundial
#

i think it mean "and" in english

alpine sable
#

Okay I guess, but you should jsut use ∩

alpine sable
cinder sundial
#

ok get back to the question, i know the Conditional probability
formula is P(B|A)=P(A ∩ B)/P(A)

cinder sundial
alpine sable
#

Yes, and you want to find P(A'|B) right

cinder sundial
#

am i right

alpine sable
#

No that's the wrong understanding

cinder sundial
#

ohh

alpine sable
#

P(B|A) means something like this: What is the probability of B if we know A happened?

alpine sable
#

Sure

#

Let me think of one

#

Okay, lets say you have a dice

#

A - we got an even number

#

B- we got a four

cinder sundial
#

then P(B|A) is when we got an even number and the number is four?

alpine sable
#

Probability that we got four under the assumption we got an even number, is : P(B|A)=P(AnB)/P(A) = (1/6))/(1/2)=1/3

#

And this answer makes sense

#

Because if you KNOW you got an even number, then the chance of getting a 4 is 1/3 because there are only 3 even numbers

cinder sundial
#

yes

#

i wonder what it looks like in venn diagram

alpine sable
#

Okay also other way to look at it

#

Do you know like what is Omega in probability?

cinder sundial
#

no i dont, i haven't learn about that yet

alpine sable
#

So how do you define P(A)?

cinder sundial
#

P(A)=n(A)/n(S)

alpine sable
#

and what is n(S) and n(A)?

cinder sundial
#

A is a event, S is the sample space

#

the n stands for numbers

#

thats the formula

alpine sable
#

Okay perfect, so basically the same thing but different notation

#

So

#

There is another way to look at the conditional probability

#

P(A|B) is basically just looking at smaller sample space

#

the sample space is now B

#

And you look at the events that fall in A and B at the same time

#

because if it isnt in B then its not in your new sample space kind of.

#

But honestly the dice example is the best and if it doesnt feel that comfortable yet then just use the formula to calculate

#

The intution will come naturally.

cinder sundial
#

i can't understand why i have to divide it by P(B) aka the sample space

#

it should be just P(B)-P(A∩B)

#

the diagram looks like P(B)-P(A∩B)

alpine sable
#

Yeah the diagram is wrong

#

I mean, the diagram doesnt show the conditional probability

#

maybe this helps you

cinder sundial
#

is it (3/4-1/4)/(3/4)

#

that will be equals to 2/4

#

P(A' |B)= [P(B)-P(A∩B)]/P(B)

cinder sundial
alpine sable
#

why is that?

#

lets go slower

#

P(A'|B)=P(A' n B)/P(B)

#

We want to find P(A' n B)

cinder sundial
alpine sable
#

okay yeah

cinder sundial
alpine sable
#

you are correct

cinder sundial
#

so its [P(B)-P(A∩B)]/P(B)

#

am i right

alpine sable
#

Yep

cinder sundial
#

then we put the numbers in

#

(3/4-1/4)/(3/4)

#

let me calculate it

alpine sable
#

How did you calculate P(AnB)?

cinder sundial
#

P(AnB) is part of the whole question

#

(3/8)+(3/4)-(7/8)=P(AnB)

alpine sable
#

yep

cinder sundial
#

yes its correct

#

(3/4-1/4)/(3/4)=2/3

alpine sable
#

yep

cinder sundial
#

i think the question is solved

#

thank you so much

alpine sable
cinder sundial
#

thank you

#

.close

lone heartBOT
#
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pulsar ember
#

Heya! Could anyone help me with this question for number 2?

clear pivot
#

I assume the ordered pair is (x,y)

pulsar ember
#

so its a?

clear pivot
pulsar ember
#

-15?

clear pivot
#

ok, is -15 less than 5 ?

pulsar ember
#

yea

clear pivot
#

then the solution pair is a solution of 2x-y<15

#

you have to do the same steps to find which is not the solution pair

pulsar ember
#

:O

#

ohh okie tysm I understand it much better

#

.close

lone heartBOT
#
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undone garnet
#

Can you pls help me wid this question?

lone heartBOT
#

@undone garnet Has your question been resolved?

undone garnet
#

<@&286206848099549185>

lone heartBOT
#

@undone garnet Has your question been resolved?

olive vigil
#

2a-4b-ax+2xb
factorisation

#

<@&286206848099549185>

#

<@&286206848099549185>

raven rover
#

Clearly you didn't

#

Asking a used channel and pinging helpers twice in the span of less than 5 minutes

olive vigil
undone garnet
#

<@&286206848099549185> any1 lol?

wary stream
undone garnet
#

sure

#

.close

lone heartBOT
#
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narrow meadow
#

how do I integrate 1/((x^5) + (x^4))?

lone heartBOT
narrow meadow
#

I've tried integration by parts

#

doesn't seem to work

#

since switching them back and forth and what not doesn't seem to help

#

I've tried integration by partial fractions

#

can't seem to get the right answer

#

It seems to be a pretty simple question but idk what I'm missing/doing wrong

#

and there doesn't seem to be anything to substitute

#

so yeah, I'm running out of ideas

alpine sable
#

Factor out (x+1)

narrow meadow
#

mhm

alpine sable
#

And then do partial fractions

#

It should be really simple after that

narrow meadow
#

yeah I did that but apparently I did something wrong since I got the wrong answer

#

I'll send working out if u want

alpine sable
#

Please

narrow meadow
#

it's messy though so I'll have to reorginse 1 sec

alpine sable
#

Haha alright, tag me when you're done so I se eit

narrow meadow
#

obviously I've done somethign wrong since the answer is wrong but

#

idk what

#

lol knowing me I probably understood partial fraction's method wrong

alpine sable
#

Yeah whenever you have a power of x that is > 1 you have to expand it out

#

Hang on

narrow meadow
#

ohhh

alpine sable
#

I'll type it out

narrow meadow
#

so I split it into like 4 more fractions

#

like 1/x + 1/x etc

#

lol sry you do you

#

don't let me interupt you

ocean sealBOT
narrow meadow
#

wait now I'm confused

#

cause the extent to which my prof taught us was like using partial fractions to solve stuff like x^2 - 1

#

by splitting it into (x-1) * (x+1)

#

so turning x^4 into the four fractions at the start

#

looks alien to me

#

😂

#

can you explain what you did there?

alpine sable
#

You mean to separate it?

narrow meadow
#

why did you turn x^4 into x^4 and x^3 and x^2 etc

alpine sable
#

I'm not sure if there's some rigorous process for it, I just subtract one from the exponent and repeat the fraction until I don't have any powers > 1 left

#

It works if you try it out now

#

Again, not in any way rigorous

narrow meadow
#

didn't know you could do that blobsweat

alpine sable
#

It's only for when you fully factor the denominator of the original equation and there's some power >1 left over

#

Then you have to do this

narrow meadow
#

ohh icic

#

so like if I have a (x+1)^2 left over

#

I turn it into x+1 squared and normal x+1

alpine sable
#

Yes

narrow meadow
#

and add it to the list of bullshit I have to work through?

alpine sable
#

Yes

narrow meadow
#

icic

alpine sable
#

Have you done any matrix work?

narrow meadow
#

lmao no idea what that is 😂

#

I'm doing year 1 undergrad calc if that answers your question

#

😂

alpine sable
#

Haha alright, it doesn't take long to learn though and it's a lot easier to figure out partial fractions if you learn it

narrow meadow
#

oh it's a method?

#

I thought it was like a topic 😂

#

haha

alpine sable
#

The method is called Gauss-Jordan Elimination

narrow meadow
#

all these weird names...

alpine sable
#

But it uses something called a coefficient matrix

#

It's way easier than it sounds

#

I'm an actual idiot when it comes to Linear algebra and I figured it out in a day or two

narrow meadow
#

:o

alpine sable
#

When I was in calc 2 I brushed off partial fractions because I thought I'd never use it

#

But it comes up often enough

narrow meadow
#

lol all this calc is marking the end of me

#

I jsut wanna get it over with so I can take comp sci in year 2 🤣

alpine sable
#

Yeah the more you know though the better. It makes everything else way easier if you understand calc

narrow meadow
#

yeah it seems practical

#

still pain in the ass though xD

alpine sable
#

Anyway, you good on that integral?

narrow meadow
#

yeye

#

should I .close?

alpine sable
#

If you feel confident

narrow meadow
#

okok

#

I'll say something again if I run into another problem 😂

#

.close

lone heartBOT
#
Channel closed

Closed by @narrow meadow

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Show your work, and if possible, explain where you are stuck.
After 15 minutes, feel free to ping <@&286206848099549185>.
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alpine sable
#

hello

lone heartBOT
alpine sable
#

Do you have a question?

#

i have an exam tmrw

#

yeah

#

Post it

#

a couple actually

#

this

#

What have you tried so far?

#

i tried to solve it as a normal inequality but that didn't work

#

photomath sloved it but i didn't understand the explaintion

#

Can you show me a picture of what you did?

#

its just a random messy paper

#

That's fine

#

wait

#

ill show you the right answer first

#

this

#

and this is the bit that i didn't understand

#

@alpine sable

gray isle
#

they combined their terms into a single fraction

alpine sable
#

^

alpine sable
#

ahhh im slow

gray isle
#

exactly as i said

alpine sable
#

why is the x-2 still in the bottom tho

gray isle
#

recall basic fraction addition/subtraction

alpine sable
#

so like they multiplied 1/x-2?

#

so it gets to both sides?

gray isle
#

() and not quite

#

no

alpine sable
#

i don't study math in english thats why im slow

gray isle
#

they first subtracted 1 from both sides

#

and then expressed 1 as (x-2)/(x-2)

#

and then simplified

alpine sable
#

waa

#

can you show me like a visual explanation

gray isle
#

starting with your initial inequality, are you able to subtract 1 from both sides fo the inequality?

alpine sable
#

just do it in paint

alpine sable
gray isle
#

i dislike that wording

#

and deliberately chose NOT to use the word "move"

alpine sable
#

idk the words for things

#

so yeah it sounds weird

gray isle
#

what language do you usually do you math in

alpine sable
#

arabic

gray isle
#

i mean your english is decent enough

#

so it shouldn't be that hard to follow these instructions

alpine sable
alpine sable
gray isle
#

if you know what "subtract" means
and you know what a side of an equation/inequality is

subtract 1 from both sides of the inequality
that should be a pretty simple step
but if you really insist
like move 1 to the other side
is how some would describe it

gray isle
#

that comes after

#

do this one step at a time

alpine sable
#

yeah i know i moved it to the other side

alpine sable
gray isle
#

would you be able to simplify something like
$$\frac23 - 1$$

ocean sealBOT
#

ℝamonov

alpine sable
gray isle
#

no

alpine sable
#

thats what you mean

gray isle
#

1/3
isn't correct

alpine sable
#

wait what

gray isle
#

how are you getting 1/3

alpine sable
#

moved 2/3 then 1 - 2/3

gray isle
#

and this is why i hate the word "move"

#

how exactly are you "moving" that 2/3

alpine sable
gray isle
#

recall the basics for adding/subtracting fractions

alpine sable
#

what i mean by move is like
x + 3 = 5
after "moving"
x = 5 - 3

#

this is what i mean

gray isle
#

1 - 2/3 would be equal to 1/3
however
2/3 - 1 is NOT the same as 1 - 2/3

gray isle
#

yeh. 2/3 - 1 is -1/3

#

and would you be able to clearly show all steps to get that

alpine sable
#

just 1 - 2/3 lol

#

or 2/3 - 1

#

for -1/3

gray isle
#

how about i use a more complicated example

#

$\frac37 - \frac23$

ocean sealBOT
#

ℝamonov

gray isle
#

how would you simplify that

alpine sable
#

but like

gray isle
#

show your work mathematically

alpine sable
#

multiply by the reverse thing

gray isle
#

show your work mathematically

alpine sable
#

like -2/3 x -3/2

#

you can do that to remove the -2/3

gray isle
#

whut

alpine sable
#

but its gonna be a wrong solution

#

frick i can't explain anything

gray isle
#

i don't understand what you're trying to do with that

like -2/3 x -3/2
you can do that to remove the -2/3

alpine sable
gray isle
#

to combine fractions through addition or subtraction
you first need to get a common denominator

alpine sable
#

oooh

#

you mean

gray isle
#

e.g.

alpine sable
#

a thing in both sides

#

like 2 in both sides of the / thing

#

so we subtract

gray isle
#

showing the work for the simplification of $\frac23 - 1$ would be \
$\frac23 - 1 = \frac23 - \frac33 = \frac{2-3}{3} = -\frac13$

ocean sealBOT
#

ℝamonov

alpine sable
#

ty

#

@gray isle wanna help me do another one?

#

its an easier one thought

lone heartBOT
#

@alpine sable Has your question been resolved?

lone heartBOT
#
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lone heartBOT
#
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Ask your math question in a clear, concise manner.
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After 15 minutes, feel free to ping <@&286206848099549185>.
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• Be polite and have a nice day!

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ivory gulch
#

ayo

lone heartBOT
ivory gulch
#

so i rlly don't know what to do here tbh. prof didn't mention an 'initial condition' in class

alpine sable
#

First of all, find y' and write out the whole equation

#

And then you just substitute the initial condition to verify that it works

ivory gulch
#

well just subtract y from both sides

#

and that's y'

alpine sable
#

Yep

#

And then verify if it works with the initial condition

ivory gulch
#

so plug in -ln(6) = x and 3pi = y

alpine sable
#

no, $y=-\frac{3\pi}{\ln(6)}$

ocean sealBOT
ivory gulch
#

how do you figure?

#

when you plug in -ln(6) in the equation y you'll get 3pi

#

so coordinate for initial condition is (-ln(6), 3pi)

ocean sealBOT
ivory gulch
lone heartBOT
#

@ivory gulch Has your question been resolved?

lone heartBOT
#
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After 15 minutes, feel free to ping <@&286206848099549185>.
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• Be polite and have a nice day!

Read #❓how-to-get-help for further information on how to ask a good question, and about conduct in the question channels.

alpine sable
#

is it possible to solve birthday problem without using computer/brute forcing

glass lichen
alpine sable
#

yes

glass lichen
#

Yes

alpine sable
#

hits 50% at 23 people

glass lichen
#

Just find the general probability for n people

#

Then solve when P(n)>=1/2

alpine sable
#

i have this so far

glass lichen
#

Yeah you'll have a bunch of factorial floating around

alpine sable
#

what do i do from here

#

i have no idea how to approach this other than just plugging all the values in

alpine sable
#

find that chance that coinciding birthdays is 50% at 23 people but symbollically, without plugging all values in

#

if that was incomprehensible i'll try better to explain

devout summit
#

It isn't exactly 50% though

glass lichen
#

1st n in N st P>1/2

alpine sable
#

yeah

lone heartBOT
#

@alpine sable Has your question been resolved?

lone heartBOT
#

@alpine sable Has your question been resolved?

alpine sable
#

i give up. homeworks due in 10 mins

#

.close

lone heartBOT
#
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alpine sable
lone heartBOT
#

@alpine sable Has your question been resolved?

lone heartBOT
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alpine sable
#

Does this seem right so far

lone heartBOT
alpine sable
#

<@&286206848099549185>

#

I don't know linear algebra sorry

#

Still have to learn

#

Rip

#

How old r u

charred flint
#

2nd line is wrong

deft geyser
#

unless AA^T is A?

#

like the A in the lhs

alpine sable
alpine sable
charred flint
#

oh nvm it's fine

alpine sable
#

Example of what I'm trying to do but with A cholesky decomp

#

In this example A is just some random matrix

#

But I'm trying to prove for this A in a similar fashion

alpine sable
#

Curiosity

clever sky
#

He's 22 ;)

glass lichen
clever sky
#

@alpine sable is 22

ebon steeple
#

Can some one pls help me with my hw

alpine sable
#

3 is c

#

Prime can be divided by 1 and his number

#

5 is a

#

Its less than 3 not less and equal

#

Last b is 7 a is is 24

#

4 i dont know

#

Literally lol

finite sonnet
#

can you post 4 stand-alone?

#

like just post question 4

alpine sable
#

Wdym

finite sonnet
#

im talking to ttk lol

alpine sable
#

4 is a

finite sonnet
#

i thought you said that you didnt know tho

alpine sable
#

I searched

finite sonnet
#

oh ok

alpine sable
#

Now i know

#

Ur welcome @ebon steeple

ebon steeple
#

@alpine sable ur the best u save me

alpine sable
#

Ohhh i like to help people

#

Thanks for the kind words

ebon steeple
#

Np

alpine sable
#

@ebon steeple

ebon steeple
#

I know but question 3

#

catThink is hard

alpine sable
#

Oh k i Wil try

ebon steeple
#

pandaWow :

#

Thanks

alpine sable
#

What school is this?

#

High-school?

ebon steeple
#

3-4 is - 1 right

ebon steeple
#

Haha

#

But 3-4 is negative 1?

alpine sable
#

Yes its - 1

#

Lol

ebon steeple
#

How do u -1
-
6 divide 5

#

This thing is hard

raw shard
#

what

#

(-1/6)/5 = (-1/6)*(1/5)

ebon steeple
#

?

alpine sable
#

Can we use latex here?

raw shard
#

yes

alpine sable
#

It would be better for explain

raw shard
#
  • means multiplied by
ebon steeple
#

I know but what does / mean

raw shard
#

division

alpine sable
#

When you divide an number which is an fraction u flip it

raw shard
#

1/5 = 1 divided by 5

ebon steeple
#

So what is the final answer for this

#

I did all the steps

#

But stuck on the last

alpine sable
#

Remember to simplify idk if they teach it

#

2-5/6,multiply by 6 2, so u can get off the fraction

ebon steeple
#

But that’s not a - that’s a negative for the 1 that why it’s hard

alpine sable
#

I don't understand

ebon steeple
#

But thank you so much u explain the steps : )

alpine sable
#

It might be 1/5

ebon steeple
#

Like this

#

The image is loading

raw shard
#

(3+1/2+1+2/3) / 5 = (3+1/2+1+2/3) * (1/5)

#

make it so they all have the same denominator

alpine sable
#

Ye exactly

#

Sorry im not good in explaining

#

If only i knew latex lol

raw shard
#

i don’t know latex and i’m usually fine

alpine sable
#

$\helllo $

#

Rip i tried

ebon steeple
#

No u all explain good thanks I finished the work sheet pandaWow

alpine sable
#

Ur welcome

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@raw shard can i ask you something

raw shard
#

yeah what

alpine sable
#

Im recapping all my study and i just don't understand this

#

Why 1/2?

raw shard
#

good site choice

alpine sable
#

Thanks ;]

raw shard
#

,w sin(pi/6)

raw shard
#

guess that’s why

alpine sable
#

Oh lol circle unit

#

Nvm thanks

raw shard
#

@ebon steeple close the channel if you’re done

alpine sable
#

Confuse me sometimes because they don't explain, but that's good so you figure it out

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Trig is my weakness

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From t/4 to pi/6, why

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Apparently 30 degree is standard

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@ebon steeple if you need help dont hesitate6

lone heartBOT
#

@alpine sable Has your question been resolved?

lone heartBOT
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little fern
#

how would i approach this calculus problem?

little fern
#

also when it says "the tangent line approximation" is it known from the question at what point that line is tangent to?

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do you even need to know that?

#

im just very confused by this question

lone heartBOT
#

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winged lantern
#

I need help with a linear algebra question: Find the vector component of vector a orthogonal to vector b, if vector a = <3,-1,7> and b = <-4,-2,9>

ebon condor
#

I dont understand

#

Like projection?

alpine sable
ebon condor
#

find $c | c\perp b$

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project a onto c

ocean sealBOT
#

KurtDee

ebon condor
#

Does this make sense?

analog locust
#

.open

ebon condor
#

?

winged lantern
#

wait

#

I went to go use the bathroom what happened

ebon condor
#

I'm working with you nelly

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idk why people are posting othe rproblems

winged lantern
#

oh thanks

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yes, it's a projection

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So I have a vector projection of a onto b, I found the magnitude and the direction; now it's asking for the vector component of a orthogonal to b

alpine sable
#

Ohhh, inverse of a 3x3 matrix

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👀

#

noice

winged lantern
#

So this formula would be the one I would use to find it?

raven chasm
#

all good

ebon condor
#

Well yes but

#

How would you find theta?

alpine sable
ebon condor
winged lantern
#

^

#

Was gonna write that

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dot product over the magnitudes of the vectors

ebon condor
#

that should be everything

winged lantern
#

Appreciate it

ebon condor
#

remember you're solving for $\perp b$, not b

ocean sealBOT
#

KurtDee

winged lantern
#

I thought in the forumla I posted, it was a1

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or would it be a2?

#

because of this

lone heartBOT
#

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remote heron
#

<@&268886789983436800>

#

remove dis deez nuts poster

sly mantle
#

b&

#

.close

lone heartBOT
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quartz osprey
lone heartBOT
quartz osprey
#

hello

#

i need some help with this

#

not really sure what to ddo once i have this infiormation

#

so i have the u and stuff

#

its gonna be x^3/3 (u)^5/5

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right?

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#

@quartz osprey Has your question been resolved?

stiff pawn
#

du should be $15x^{2}dx$

ocean sealBOT
#

RyanDuarte56

stiff pawn
#

so $x^{2}dx=\frac{du}{15}$

ocean sealBOT
#

RyanDuarte56

stiff pawn
#

so the integral becomes $\int_{-1}^{4}\frac{u^{4}}{15}du$

ocean sealBOT
#

RyanDuarte56

stiff pawn
#

got it?

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#

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nocturne onyx
lone heartBOT
nocturne onyx
#

any suggestions on how to solve this limit?

lone heartBOT
#

@nocturne onyx Has your question been resolved?

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nocturne onyx
#

no

lone heartBOT
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nocturne onyx
#

<@&286206848099549185>

lone heartBOT
nocturne onyx
devout summit
gray isle
#

recall your definitions of e

lone heartBOT
#

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