#help-28
1 messages · Page 3 of 1
no you move the 6x to the left
idk my teacher did this to solve a Rational Equation
he said find the LCD then multiply each fraction by it
to get to the trinomial
or whatever that is binomial
then to solve for x after that
thats the problem he did in class and i have to do these types of problems for homework
sorry i just wrote what my teacher had on the board
i wanted to know how to multiply the fractions
oh
thank u
how do u get rid of the 3x under the fraction at the second to last step
multiply both sides by 3x?
Multiply
Np
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Bros how do I answer parts ii and iii
what have you tried so far?
Why is it not right
Its right
1/27 is 3 raised to -3 power
He just hasn't simplified more yet
Oh, I see. I was looking at the wrong part.
Anyone?
So, you have log₃(p) = q.
Uhuh
So, get rid of the logarithm.
Yes
But the questiob requires in terms of p
Damn
I see it bruh
Lmao
3q
3 raised to -p power
How about part iii
Then, you have 3^(-3q).
this doesn't seem right
Yes, but the answer isn't 3⁻ᵖ.
have a read of Chai's explanation
Sorry?
BRUH
this is not right
Right, now separate 3^(-3q) into two powers of 3.
Then, you can replace one with p.
I make it into (3^q)^-3?
Yes, that's right.
Aight
Final answer is 1/p cubed
How about iii
Nvm i see it
p squared = 5p -6
Amiright
Right.
Thx a bunch bros
No problem.
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Can someone help me get an example for real life situations which involves arithmetic sequence?
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does $\int f(x), d(k - x)$ make any sense?
kinglacto
hm ok
what about definite?
Is that meant to be $\int f(x), dk - dx$
I have seen one case where the dx is written by something else in case of an definite integral I think
no
NEONPerseus
oh
yeah instead of small intervals of x, i.e dx, small intervals of k - x, i.e d(k - x)
hm ig it doesnt make sense yea thank you
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this is awkward
can u latex it
thats an evil request
true haha

if all your working is correct (havent checked) then you are very close to a nice answer
if the second term in the product in your last line was m/n then we could add exponents
what can we do to the exponent to turn n/m into m/n
like?
$a^b = \left(\frac{1}{a}\right)^?$
ΣAC
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Hello
do u have any work?
Use limit chain
Nope
I was thinking that it would evaluate to 0.
Through Limit Laws and whatnot.
Would that be 3pi/2?
yes
$\lim_{x\to\infty}\cos\left(\frac{3x^4+3x+1}{2x^4}π\right) \equiv \cos\left(\lim_{x\to\infty} \frac{3πx^4}{2x^4}\right)$$
0?
Bruh
Umbraleviathan
Compile Error! Click the
reaction for more information.
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Yeah, since cos of 3pi/2 is 0.
Then how did my professor get this?
Yeah
it wouldve been 3/2
How?
My question is, where did he get that math from?
I mean I have it right here
Hold on
He got 3pi instead of 3pi/2 for the inside.
They're literally wrong
(a+b+c)/d=a/d+b/d+c/d he used that
he messed up
he forgot a/d
I mean my work checks out
and yeah it wouldve been 3/2
dont worry man professors are also human
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how would I go about doing this problem, I know that I need to divide everything by x, but I tried it a couple times and I still am not getting it right
well i would simplify the x^-5 first
so 1/x^5 right
Yeah
ok
No you literally erase it
remember limit properties
One of those cases where you grab your eraser and get rid of the fucker
yeah so 6/infiniti is essentially 0
Yesh
$\lim_{x\to\infty} \frac{8\sqrt{x}+x^{-5}}{5x-6} \equiv \lim_{x\to\infty}\frac{8\sqrt{x}}{5x}$
Umbraleviathan
ok so now what is the square root of infiniti divided by infiniti
Well I mean
that kinda confuses me
Use power rules
bottom grows bigger than top
Sqrt(x) = x^(1/2)
simplify it to 1/ sq root of infinity
Ye
just looking at top and bottom growth for most limits works perfect
i would never rely on it tho!
ok sounds good I'll put 0 into mathlabs
yeah I don't want to do that all the time
still trying to learn this stuff you know
thanks for your help yall
Np
✌️
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really easily but i forgot 😦
https://youtube.com/watch?+&v=XsW8HJutIgM&feature=emb_title
See if this helps
Welcome to Adding and Subtracting Fractions with Unlike Denominators with Mr. J! Need help with adding and subtracting fractions? You're in the right place!
Whether you're just starting out, or need a quick refresher, this is the video for you if you're looking for help with how to add and subtract fractions with unlike denominators (aka - addi...
does it show when there's multiplication added to it too?
work out the operations one by one just like you would if the expression didn't have any fractions
first multiply 4/9 * 1/3
then subtract 1/3
then add 4/9
one step at a time
i did but got 25/27 somehow
show work
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what number should be written under the sign of the sentence instead of x so that the equality is correct?
idk how to do
$\frac{\sqrt{75}+\sqrt{3}}{\sqrt{3}} = \frac{\sqrt{75}}{\sqrt{3}}+\frac{\sqrt{3}}{\sqrt{3}}$
layla💜
"sign of the sentence"?
snowy
what would x be
how another 3 comes
can you explain
how another 3 comes
by this what you said?
uh
snowy
snowy
$\sqrt x = 5$
snowy
what is x
x = 25
5
snowy
from this answer is 6
and the right answer for this is 32
how?
could you explain why?
where's 32 coming from
6?
doesn't answer my question
are you sure the book is saying that?
they're asking for the value of $x$ where
$$\sqrt{x} = \frac{\sqrt{75}+ \sqrt{3}}{\sqrt{3}} = 6$$
ℝamonov
yeah
x won't be 32
so you think book has mistake in answers?
square it
dunno, countless people have looked in the wrong section and/or misread what the book saying
but the reason?
you can shift the square foot to lhs so basically i mean just square the middle expression
if the book indeed says x=32, it is wrong
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yes
@torn jolt Has your question been resolved?
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Ok, we have a function f : Z -> N, could x^2 be surjective? I know it wouldn't be if it was f : Z -> Z because it only maps to the positive integers. So, if it's to natural numbers, it should be surjective, no? or am I missing something?
Not really. Image of this function is the set of square number. Since not every integer is a square number, the image does not completely cover N. Hence your function is not surjective on N.
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Hello
what's the thing ur tryna achieve?
The first 10 terms
have you tried inserting for each n?
n=1
well you'd have to find an n such that a_(n+1) = a_(2)
Why is it n=1?
1+1=2
yep
Wow
you got this
I can't believe this.
Lol
And what would I put for an?
Just what I go for the previous one?
yes a_n is a_n
yep, so if u want to find a_69420, then ud have to solve the mini problem in the bottom for n
so n + 2 = 69420, so n= 69418
thats the general logic for any question of this form
For this one
When I tried to find a_8, I got positive 1/64.
Isn't it supposed to be negative?
whats a7 for reference?
@near lance I ike your name
Lol
Ok
So about this.
If I wanted to find a_3, what would I need to do?
@livid star
How would I set it up?
you tell me, what n would you need so that a(n+2) = a(3)
n = 1
now on the rhs, use that n = 1 and ull get an answer 😄
So what? a_3 = a_2 + a_1?
Ahhh
I get it.
So this basically just adds the last through.
Ok, thank you
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I am to convert the signed binary 110100 to decimal.
My thinking is that the first "1" signals that the number is negative and then proceed to calculate the remaining bits to:
16+4 = -20
This appears to be incorrect, so what am I missing here? Should I include the value of the sign-bit as well? Giving me:
(-32)+16+4=-12
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Is this inference valid?
@leaden anvil Has your question been resolved?
<@&286206848099549185> 🥺
@leaden anvil Has your question been resolved?
@leaden anvil Has your question been resolved?
@leaden anvil Has your question been resolved?
@leaden anvil Has your question been resolved?
It'd saying the same thing twice. It's valid, I'm not sure what's inference.
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Use the figure (the blue triangle) to geometrically determine the exact values for
cos(π/4) og sin(π/4)
how do i do?
i know that a=1
because its a unitcircle
do i then have to find arg?
Yes so
Lets see
Do you know whats cos π/4?
No i mean, what is the value
nah i dont
0,99
Cos π\4= √2/2
.......
You dont know this one?
no
yea
Uhh
Dude
We dont use this
0.7
And 0.198394849933 or whatever
We need exact form
Use roots and fractions
This is math not engineering
(square root 2)/2
yeah
same thing
Okay so
We have graph of y=x, the intersection with y axis and axis gives us what kind of triangle?
idk if it correct term in english
yes
Radius?
Now can you tell me whats the length of hypotenuse?
Now lets call the other two sides A and B
What do you notice about them?
Like, what are they to each other?
90* to eachother
I mean in terms of length
theyre the same?
squareroot cos()^2+sin()^2?
Use the Pythagorean theorem
.
That is not the Pythagorean theorem is it?
its what i remember my teacher told us to use
otherwise i rememberede wrong
but a^2+b^2=c^2
yea
what is a again??
Okay good
but ty for the help
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i was studying answers from economic olympiad problems, i tried to understand this, i still dont get how p becomes 100p
we pull the sum on the left apart and have $\sum_{i=1}^{100} 100i - \sum_{i=1}^{100} p$
Denascite
ohhh i get itt
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@nova osprey Has your question been resolved?
use similar triangles
it would be easier to tell where you're stuck if u can send ur working
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,rotate
So in this task I should calculate the height of that tower. My result was 20.23m
is that correct?
<@&286206848099549185>
<@&286206848099549185>
@torn jolt Has your question been resolved?
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!15m
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it is??
Yes
yw
No idea, I don't remember who are all the people I help... I do remember I helped you a couple of times though
😄
We already get a lot of pings everyday so hopefully you understand why we have that rule... Be patient and people will come to help eventually
I've got more solutions but I wont bother with you that
its ok
sometimes tho it takes hours till someone answers
Yeah it's true, but now that school restarted for most people we get a lot more questions and there's not a lot of us
If you want to check them yourself try to find another side with the given information (you can find the hypotenuse of the bugger right triangle with the sin rule, for example) and see whether everything checks out (you can either check the sides of the bigger right triangle with Pythagoras theorem or with sin(x)=o/h, in this case)
yeah but if I use pythorgoras
and get the hypotenuse
there is nothing to compare it with
No, get the hypotenuse with sin rule
my value could still be gibberish and it would match up
Then Pythagoras with hypotenuse and adjacent side to find opposite side
I was talking about this case specifically though
ah
Of course if you have something else is not always possible to check it
how would I get the hypotenuse with sin if I dont have the value of the kathete
this one
I'm talking about triangle ABC, you can find BC with sin rule
BC is the hypotenuse of BCD
um
23.13sin(61)=CD
my brain is kinda dead right now, too much math
Don't worry
ok
if I find AD I can use pythogaras
to check if its correct
and if it isn't a tringular with 90 degrees im basically fucked
Yes, you can do that too
Maybe you can do something with sin rule, but in general it's harder to check if you don't have right triangles
Yeah maybe
Np, you're welcome
I can send you my solution to the other problem if you have time
if you dont, no worries
Rn I'm about to have dinner, if you send it rn I might be able to check it real quick though
Did you already try to do something?
yes wait
Ok
Correct
yw
Thanks, have a good day
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is x! possible when
- x is a decimal
- x is a negative integer
ofc
x! is factorial
you need the gamma function for negative integers
how do u calculate factorial for decimals
okay
you do a complex integral
like 1.5! = 3/2 *(1/2)*gamma(1/2)
can u link any video on yt where i can learn about gamma function for factorials
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This video lecture of Gamma Function - Properties & Its Application | Integral Calculus | Example and Solution by GP Sir will help Engineering and Basic Science students to understand following to...
you know hindi ryt
this is good
thx
In this video I introduce the Gamma Function.
For more videos on this topic, visit:
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are u also preparing for jee?
yes, but I am so low, I wouldn't even pass it
I told you right
i forgor
oohh that definate integral
it was me
lmao the ques whos ans was ab?
that's why maybe
yes
and 100 etc for other
we did many together
💀
8 and -9
lol
thx ill watch the video
range
yes i remember
ok bye see ya
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I'm stuck on where to start with this question
Basically this question is wanting you to understand how transformations affect mean and standard deviation
like whenever you add a value c to every point in a set, the standard deviation does not change
but if u add a value c to every point in a set, the mean changes exactly by +c
and if u have a scaling factor bx, then the standard deviation & mean is also affected in the same fashion, i.e., it would become b*standard deviation
what is +c?
in this case, c is -20
so new mean would be 1.4 * 60.8 -20, and new Std would be 1.4*6.6
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This question is on discrete mathematics, or logic math.
So because the first line in the red box says -> not p or r
if the left proposition evaluates to not p, the whole compound proposition is false.
so it must evaluation to r to make the original question true?
looking it up, this may be called distribution of implication for those looking for this in the future
.solved
.close
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so i know its 4
and i know when dividing
when subtract exponents
but i cant figure out how to write those exponents to subtract them
is it 6-7? that would equal 1
is it 6 - (-7) ?
the would equal 13
ohhhh
~Martin
how does it turn into a positive here?
$x^y=\frac{1}{x^{-y}}$
~Martin
or the other way around
$x^{-y}=\frac{1}{x^y}$
~Martin
what type of math is this called?
if i were to look up videos on it on youtube
like this specifically
this specifically is exponent rules
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We did some others kind of like this but not with linear pairs, can someone point me in the right direction? Don't know where to begin
on number 57
@silk tapir Has your question been resolved?
Linear pair angles add up to 180 solve for x and h @silk tapir
Yeah
U got it?
No
What u confused about
how do I solve for the variables?
So for x
U would set
12x-8 + 6x + 8 = 180
18x + 0 = 180
18x/18 = 180/18
X = 10
18x divided by 18?
So the angles on the bottom plus one on the top still equals 180?
Wdym
Linear pairs add up to = 180
1 sec lemme find something
So vertical are diagonal from each other and are congruent
So 1 and 7 are equal and they are vertical pairs
But 5 and 7 add up to 180
So if I solved for x
I could put one of the equations for y equal to 180 after subtracting the one across from it?
Say x was 2
24-8
It's 16
so I could theoretically
take 2y-12=180-16?
And get y?
And I could also solve for y the same way I did for x
Yes
Ok I think that solves it then, thanks
Yw good luck with the rest
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How do I integrate this to find the original function then find C and plug it in to the original function
I know how to find C and do the rest
(please ping me)
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thanks tho
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how do i solve this integral analytically (preferably a closed form solution for the positive real numbers):
i was thinking of using numerical approximation methods; but, wanted clarification if this was analytically derivable
<@&286206848099549185>
@mystic rover Has your question been resolved?
<@&286206848099549185>
Have you tried anything yet that isnt just "possible routes"?
((holy shit i just checked a "manual" solution to this, involves polylogarithms, partial frac decomp, quite a lot of subs, a bit of hyperbolic functions, plus some by-parts
This is a really long problem to do by hand which would end up with a complex solution))
just sayin^^
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in part a to find the area of a trapezium do i just have to use the formula and plug in values of height and sum of parallel lines which in this case is 2 and 6
Please don't occupy multiple help channels.
will it become 1/2 * 3 (2 + 6)
as they said in the question the area of a trapezium so it is from a b c and d
does that make sense?
seems right yea
okay so i wanted to ask that if i have to find the total surface area of this shape, is it right to say that there are two rectangles, two trapeziums and two squares?
so ill individually find the area and add them altogether to find the total surface areas
i feel like there will be two rhombus or parallelograms but not a square
i dont see squares.. those are rectangles lol
but did you see the bigger one
there are two rectangles and two trapeziums
this red one
what is your working?
i took out the area of the first rectangle that was 40 so added it became 80, for trapezium the area was 12 so added 12 + 12 = 24 and for the bigger rectangle it was 100 so 100 + 100 that gave 200 so i added it 40 + 40 + 100 + 100 + 12 + 12
that gave 304
i might have made an error somewhere
oh no that’s my bad
i got confused a bit
ill edit it
sorry, theres only 1 rectangle with area of 100
theres a faster way to do it which is to get 2* the area of a trapezium +
perimeter of trapizium*height
oh
as in this case its kinda just a trapezium stretched
if u do the working ull notice a lot of 20 * length of other side
so if the area of a trapezium was twelve can you just multiply it with two
i mean as this case its just the trapezium strectched yea
i dont know the term but i thnk theres a term for stuff where its just 1 shape stretched into 3d
i dont quite know what u are saying
okay so for total surface area i have to add all the areas
yea that works
um there are 6 surfaces and only one with 40
thats why i said to just do this
that will be the surface area of the other 4 surfaces
im not sure unable to understand
so like
i have been using that idea to find the total surface areas so iwas trying to apply the same thing there
if it’s possible can you explain it with my diagram
so there are two trapeziums
this is the perimeter of the trapezium
i got the area of the first one part a that was 12
so do you have to add all the sides of a trapezium?
basically the outer sides to find the perimeter and then add them in the areas i guess
but isn’t it to find the total surface area you don’t need the perimeter
oh
i just meant for each of the 4 surfaces
two rectangles
the length of 1 side will be 20
the other length will be
2 3 5 and 6
so instead of doing
2 * 20 + 3 * 20 + 5 * 20 + 6 * 20
u can do 20 * (2+3+5+6)
makes it less error prone as well
i really liked your method
btw did u get the 4 surfaces? (excluding trapeziums)
the using perimeter one?
yes ive understood it but like im still trying to make another surface on my diagram
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How do you find the orthocenter of a triangle when given all 3 vertices?
Tried searching about it but peoples explaination didn't make sense
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Hi what is the formula for this function?
Ignore what I just sent, didn't account for end behavior.
So there's double roots at -1, 0 and 1
Meaning x², (x-1)² and (x+1)² are factors
Meaning y=ax²(x+1)²(x-1)² for some positive a
,w expand x^2 (x^2 -1)^2
@gilded light Has your question been resolved?
yez
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I have no idea how to get the answer
Heh
I don't want to spoil it for you because it's a fun question
Did you try sketching it out with a piece of paper?
Idk how to start it
Sketch it first, trust me
okay i did
What did you get?
I only drew it, idk what Im supposed to do after
squares? no?
Maybe show what you got
I just drew the same image
ooh okay, yes i got 9
4? or do I turn that into a fraction?
yes
What fraction is colored
You have indeed 4 with color. But they are only colored for a part
so 1/4? im not sure
2?
1/2 ?
Yes
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Anybody know how to find the orthocenter of a triangle when given the three vertices
Searched it up but still a bit confused
I knew but I kinda forgot I will try to find a video if u want
I think its not that hard from what I can remember
please
Do you need someone to talk when they explain in video so you can understand or I can search not english types?
yeah i dont need them to talk
Cause I think I have some nice tutorials in my language
Nice I will search and come back to you
Дефиниције, решени задаци
Контакт e-mail:
skolarajak@gmail.com
Веб сајт школе:
http://www.rajak.rs
Start watching at 3rd minute
Idk if this will help cause she also explains and you don't know the language but yeah try it
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?
Those are certainly numbers
I took architecture because I liked drawing pretty buildings
Not for the scary math problems;-;
Lol
Yoooo
When did you become helper
Congratsss
I'm not sure where to start, do I distribute the exponents?
Yes