math-help

[willow basin]

https://tenor.com/view/frustrated-ugh-headache-gif-7532429

anyone know a shortcut for this?

please ping in reply.

ty

[thorn pine]

🫂

[patent mason]

hey guys i'm a bit slow. Do you guys know how to do B? Thanks!

[left knoll]

yes thank you

[worthy willow]

quite confused of the final answer of this problem.
If the °F scale is twice the °C scale, what is the reading in Celsius?
is it 160 C or 5/18 C?

[left knoll]

Can i ask a polynomial question

Yes

[sullen thicket]

can u guys help for this😿

[left knoll]

B=2

😁

[left knoll]

here you go, I hope you understand and that it is helpful

[left knoll]

How do you solve circular arrangements

Permutations

[sullen thicket]

Yess i understand thank u 💗

[sullen thicket]

I understand that😿😿

[left knoll]

hey

another easy question

f(x) = log2log3log5log7(x-1)

the answer to this is x belongs to (7^5+1, infinity)

can anyone explain the steps please

[left knoll]

answer is 15

[sullen thicket]

Thank u 💗

[left knoll]

it s by taking log

Idk how to type base on log here

x= log(base5)3

then x+1 = log(base5)3+1

that is 5^(log3/log5)+1

ans: 15

[fringe stratus]

Hi guys !
Anyone knows how to prove that the product of 2 noetherian (also called well founded for some teachers) orders is a noetherian order ?

[still furnace]

Hi guys, does anyone here has experience in optimization problems?

[novel lance]

@everyone arkadaşlar merhaba ben matematik öğretmeni Furkan Murat Gül. benim sadece matematik üzerine açtığım bir discord sunucum var. orada zaman zaman ücretsiz olarak online dersler yapacağım katılmak isteyen arkadaşlar için discord linkim instagramda
@everyone ayrıca instagram adresini takip ederek duyuruları kaçırma https://www.instagram.com/private.mathss/

[mild oak]

Decide if the following binary relation is a function (second one)

[fervent tide]

Yes, the second on is a function, because sin(x)+1 has only one output y per input x

[left knoll]

PLEASE

I JUST WANT HELP BUT NO ONE EVER HELP ME

[left knoll]

Oh thank you

[left knoll]

@left knoll yo

[vast sierra]

ok need help on a calc 2 question

Set up the integral that uses the method of cylindrical shells to find the volume V of the solid obtained by rotating the region bounded by the given curves about the x-axis.
y = sqrt(x) + 2, y = 2, x = 9

i got this function (4th row) as an answer n cannot figure out what's wrong

i even double checked using the washer method (5th row) n got the same

ik i need to put in the pi values for those two functions, i just excluded them temporarily for readability's sake for myself

it might just be my homework software tripping but I want to know if i set it up right or no

[sage coral]

what are the odds of winning 1/50 3 times in a row

[left knoll]

1/50 * 1/50 * 1/50 = 1/125000
watch this video
https://www.youtube.com/watch?v=xSc4oLA9e8o&ab_channel=KhanAcademy

[sage coral]

that's a very interesting video thanks

[drowsy rampart]

yo guys

is my explanation correct?

[left knoll]

yes

1. rq = rs
2. rp = rt
3. the angle s r p = the angle q r t
   then the two triangles are similar

hey guys

how to prove that cos(x^1/2) is not periodic??

[raw aspen]

Help me pls🙏🏼

[raw aspen]

Thank you 🙏🏼

[acoustic crater]

my answer did not help lol

i use a math solver tool

and google trasnalete

LOL!

[soft lintel]

nobody I guess 👀

[acoustic crater]

0 people

[soft lintel]

oh yeah they are missing I'm sorry I think u need a formula for that

a formula that includes both the cumulative percent and the # of custumers

just use the other known columns

[left knoll]

No u should be able to do it off the graph

[soft lintel]

even if it's MCQ u should calculate smthg, but i guess the formula can be known just from the graph

[left knoll]

30 people

Tysm!!!

[vital shard]

did i do right?

[frosty raft]

help. how do they get 3t^2 +3 from the sqrt of what i underlined in blue

[mild oak]

How to prove the equality of 3, 4, 5?
The first equality is proved quite clearly.
The second is intuitive.
(The equalities may also turn out to be incorrect, but this needs to be proved or explained.)

[left knoll]

hi, i need help doing a question, its permutations and combinations. An urn contains twenty chips, numbered 1 through 20. Two are drawn simultaneously. The number of ways that the numbers on the two chips will differ by more than 2 (i.e. |chip1 - chip2| > 2) is -

[left knoll]

that's chegg answer

[left knoll]

i know the question is similar, and i did 20C2 as well and i got 190, although i cannot figure out how they got 153 as the number of ways in which the number on the 2 chips will differ by 2 to be 153.

[left knoll]

and my teacher has given the options as follows, it can be multiple correct as well

now ik for a fact that its not 210 or 20 factorial

but it also cannot be option c considering chegg solved the number of ways in which the numbers on the 2 chips differs by 2.

also how did u get past the paywall on chegg? @left knoll

[hearty estuary]

Try to find the number of way the numbers have differ by less or equal than two it should be way easier

they need to be either k and k+1 or k and k+2

then maybe 1 - P(E) ?

[left knoll]

maybe ur teacher made a miscalculation

[vast sierra]

how do i do thtis

very confused

in particular I don't understand how to set up the integral for the volume

because I'd need to get the base and height of the triangle in terms of one variable right?

idk how to do that in a triangle I don't know the characteristics of

[steep cape]

@vast sierra find the tank's volume: (4×4×18)/2= 144(m^3).
Find the mass of the water contained in the tank:
144×1000= 144000 kg.
At the final step use the potential energy formula to calculate W (mgh) :
9.8×144000×2=2822400 j
I hope that's the right answer

[crude wraith]

coding question

using namespace std;

int main() {
    float x= 107/100;
    cout << float(x);
    
    return 0;
}

expected output: 1.07
code output: 1

anyone know any problem with it

[left knoll]

107/100 = 1 cuz 107,100 are integers
So Integer / Integer = Integer not float
It'd be 1.07 if it's 107.0/100 or (float) 107/100
(this for java idk if it's the same for c++)

[crude wraith]

it worked thank you

[quartz crystal]

is it right that the range of this function would be (-∞, -1) U (0, 1]?

tia

[acoustic forge]

This is the function

The range for f(x) would be (0,1]

(I think)

[quartz crystal]

for the graph wouldn't it be (-1, 0) U (0, 1] since the neg values between 0 and -1 r included?

got confused with the conditions, thanks btw.

oh wait.

[acoustic forge]

It's not limited for x

[lavish bison]

Any idea?

[quartz crystal]

shouldn't the graph be like this since postive x would yield negative y and vv.

[acoustic forge]

Just replace f(x) with y and try to build a graph

[acoustic forge]

oops

should be like this

[acoustic forge]

sry, my bad. Haven't done these for more than a year

[acoustic forge]

a. 2/5(a+b)+3a

b. 2/5(a+b)

c. MN is parallel to OB then AM:MO=AN:NB=2:3

[quartz crystal]

it's clear to me now. ty for your time!

[acoustic forge]

always draw a graph bc it's much easier to do it that way especially with complex functions.
NP, good luck with math. It's very fun when you start understanding the topic!

[formal vector]

Hey! In logic, what's the difference between the biconditional statement "p if and only if q" and "P only if q"?

Also, does "p if only q" mean p-->q and q-->p?

[blissful ridge]

The solution says 0.5…

Can someone help me find the mistake I made?

[near iron]

What's the complete question?... The Algebra seems correct

[blissful ridge]

Ugh idk it’s in German and I don’t know the terms in English

[near iron]

Could you Send that in A Pic... Maybe will try translating

[blissful ridge]

Dw I will ask my teacher

[left knoll]

i dont need to find the probability, although the rest i understand. thank you !

[left knoll]

i dont think she made a calculation, she has probably added the third option of the question to confuse everyone.

[cyan barn]

d/dx x^x

anyone know that

[dusty sequoia]

can u guys help me with this?

what does this mean?

[cyan barn]

thanks

[fervent bolt]

hello

can anyone help me with second degree polynomial functions and second degree equations roots etc

i'm french student but i can try to learn in english😓

[left knoll]

In French people go to university while they r - 18?

[soft lintel]

nah i don't think so that's in asian countries I guess

[soft lintel]

try watching "Black pen red pen "

he explains everything step by step and gives so much details in a smooth yet comprehensible way

[quartz scroll]

A math meme that is actually funny rather then stupid:
Solve carefully!
230-220x0,5 =

You probably won’t believe it but the answer is 5!

[feral forge]

i don't get it can you explain

[quartz scroll]

5!= 5x4x3x2x1

=120

[stark onyx]

*0.5

[crimson ledge]

would anyone be able to help me with this?

[drowsy rampart]

Yo guys I would kindly ask you guys to help me out
Question :
Two variables, x and y, varies at which y varies inversely as x^p. Given that the constant of proportionality is 36 and y =9 when x =2. Find the value of p

[fervent bolt]

…

[fervent bolt]

Ahaha no im 16 why ?

Because this is for university ?

[boreal meadow]

can anyone help with this question

a. Complete the perfect square and give the vertex form of the function f(x) = (x^2) -2x -5
b. Describe the transformations given in Section 2-2 of the textbook that you would apply to the basic function g(x) = x^2 to obtain the function f(x) in part (a) and sketch it. Do not plot points.

[unique solstice]

Is anyone good at applied mathematics?

[left knoll]

Can anyone help me?? thanksss please dm me too

[inland light]

I can't understand the solution

Can anyone help me with it ?

It'll be appreciated:)

Here we have to solve for x

[inland light]

It's a foundation called "physics wallah" and it's a jee category channel called "JEE wallah".

Are you from India?

[acoustic rampart]

Hi does anybody know how to do it?

[pulsar turret]

Can anyone help me solve this question?

[inland light]

No problem!

[sweet karma]

can someone help me pls

[sturdy mulch]

Sorry I can barely read it

[left knoll]

i think it's { lim x-> infinity or zero (x square ( 1+2+3 ....... E(1/x))

i barely remember lim so i can't help

[vagrant sonnet]

how do you get 4x at the bottom?
i don't really get it...

[haughty portal]

It's a trigonometric identity, if you simplify the parenthesis you will get the terms 4xcos^2x + 4xsin^2x, then you can express it as 4x (cos^2x+sin^2x)
In trigo identities: cos^2x+sin^2x = 1
hence, 4x (1)

[pulsar turret]

Guys please, I have a test

[haughty portal]

are there no other details in the problem?

[pulsar turret]

Unfortunately, no

[civic wave]

yeah we will need at least one of the sides in order to solve it

I think

wait

nvm

let me rethink it

yeah we would need at least one side of the triangle

[frosty raft]

this is calc 3:

i cant figure out whats wrong with my work. is this not how u find the area?

[restive wedge]

bruh its a scale diagram

1cm;8m

just measure with ruler

[vagrant sonnet]

Thank you, didn't know that the identity you mentioned existed

[haughty portal]

no problem

do you know the magic hexagon so that you dont need to memorize the identities?

there are also others like tan ^2 + 1 = sec^2

[edgy sun]

how to do questions a-c

[kind fossil]

hey uh im sorry for asking this because its pretty basic but my math teacher just doesnt do shit in a way that i can understand so i thought id ask
basically he jumped us into like equations that have to do with like powers

and i dont get that shit

for example we got like

8^3*x

the whole "3*x" is the power

so iwas wondering like

how should i approach this

again sorry for asking

[modest compass]

It depends, what are you trying to do with it? Differentiate, integrate or something else entirely?

In either case you’d most likely end up having to use logarithm (typically the natural log)

[kind fossil]

Oh I forgot to mention it’s 8^3*x = 4 and I gotta solve for x

[haughty portal]

yep you should apply a logarithm property to both sides

log with base 8

log sub 8 (8^3x) = log sub 8 (4)
3x = 2/3
x = 2/9

[deep edge]

Can u guys help me find the derivative of numbers 7,8 and 10. I also need solutions so I can study it😭😭 tysm

[deep edge]

thank you🫶

[soft lintel]

Did anyone here study infinite series or know how to solve them. Our teacher told us that we sould multiply Sn in this exercise by** (1-a)** to the power of smthg I tried Sn.(1-a) but didn't get anything can somebody help. thanks !

[left knoll]

isn't it divergent or convergent question?

[charred charm]

i have no clue what to do

[sly sandal]

I've been able to guess that its 3

But i cant solve for it

anyone?

[soft lintel]

I just have to find the value of the serie but I think I figured it out thank you : )

[gritty marsh]

I have problem with the Gaussian elimination, I don't understand when it has a single solution or when it has an infinity of solution depending of other factor like x = 2y z = 3y

[soft lintel]

https://www.youtube.com/watch?v=eDb6iugi6Uk

hey everyone I have a little question. Is there a certain order to set the eigenvalues ​​in the diagonal D of a matrix in its diagonal form. Because the order of the eigenvalues ​​changes the diagonal matrix. thus I don't end up with the same result as the ones in my book❗

[pulsar turret]

How do I find DC and CB?

[gritty epoch]

Since u have all the angles and one side, you can use sine rule to find the other sides

SinA/a=SinB/b=SinC/c

[rough ore]

did you try something like this?

[pulsar turret]

Yeah okay, thanks

[sly sandal]

I thought about it for like 30 minutes

And it's something that simple😭😭

[calm marten]

can anyne help mex,d? idk how to solve, pls

[frosty rapids]

@calm marten
I(2,n)= I(1+1,(n-1)+1) = I(2,n-1)+I(1,n) = I(2,n-1) + 1
(recurrence)=> I(2,n) = I( 2 , n-(n-1) ) + (n-1) = I(2,1) + n-1 = 1 + n-1 = n
( im really not sure but maybe )

[left knoll]

@calm marten this function I(m,n) means an intersection of the m row on the left side and the n row on the right side. it doesnt matter which side m row and n row on. what matters is they should be on the different side. sorry for my bad english

@calm marten this is pascal triangle

[drifting siren]

what do I do when I model regression and I have 2 different functions that have the same R^2 value?

[glacial bay]

Where do I even start??

[stark root]

Try to express the distance sqrt(3)+1 in terms of the angles (and therefore in terms of K)

Hint: maybe cos could be useful?

[gloomy parrot]

1+2Cosec=-sec2x/2/2

[full harness]

This may be a weird question, but i genuinely need some input, i've been working on this for way too long and nothing is making sense.

For an investigation in school, i chose optimization of packaging material. there are loads of investigations that are out there, that optimize packaging material of simple 3D shapes like cuboids, cylinders and cones. However, i wanted to go a step further and graph containers to obtain a piecewise function, use the surface area formula to calculate the surface area of solids of revolution.

Because this is optimization, i won't find a "value" for the surface area, rather a function, where i find the optimal value of x that will minimize the surface area and maximize the volume (which is fixed). therefore, equate the first derivative to the surface area function to 0, calculate the optimal value of x, and then, to determine whether its a minima or maxima, use the second derivative

my question is- does this make sense? because ive done some calculations and literally nothing is working

[pale wasp]

Can someone give me 2 Circle and 2 Parabola problem sets?

[tulip root]

me 2

[queen herald]

Can anyone help me this

There are 200 workers in company A and 75% of them are working in Uk. How many of the Uk workers should be let go to decrease the propotion of the UK workers to 60%

[glacial bay]

Yehh i got it

[glacial bay]

The answer is actually 3

[past thunder]

Anyone doing AMC 12

[marsh quartz]

There are 200*0.75=150 workers in the company A
now you just do 150-(150x0.40) or just 150x0.60 which is equal to 90

[restive wedge]

how to integrate using the substitution? nvm I did it

[drowsy matrix]

guys, can u help with this crap? I just don't have any ideas

[calm marten]

Yep

[left knoll]

Use lhopital’s rule

[drowsy matrix]

excuse me, but how can I use this rule here?

[left knoll]

Notice that when x approaches 1, the fraction becomes 0/0, thats the condition required for lhopital

[left knoll]

m(bcd)=?

Why do we divide by four?

[left knoll]

D = 360 - 100 = 260
x + 5x + 2x +260 =360 (The sum of the angles of any quadrilateral = 360)
then x = 12.5
so 2x = 2 * 12.5 = 25

[left knoll]

Thank you!🥂

[deep edge]

Can you help me here? I suck at problem solvings ://

[idle heron]

yo does anyone know what it means to "show" in maths?

[tulip root]

Probably prove

[left knoll]

Prove

[tired trellis]

hey guys, somebody know about analytical and spatial geometry, i need help please

[potent moon]

I feel like an idiot right now, can anyone help me with this?

[wispy yoke]

hihi, i can shed some light, so initially you wanna plug in h for 0 to see what happens. you'll get 0/0, which is an indeterminate case. you can use l'hopitals rule which allows you to take the derivative of the numerator and denominator with respect to h, and then evaluate it at h=0. you should get -1/x^2

[tulip root]

Yeah or u could just combine the fractions uptop and see if you can simplify it any further

Then plug in h

[urban egret]

Hi! can anyone help me translate this sentence mathematically: "Marketing restrictions require the number of chairs produced be at least twice the number of desks produced."
Let x1 = desks; x2 = chairs

Apparently the answer is
2x1 - x2 <= 0

My question is why is it not
x1 - 2x2 <= 0 ???

[pastel geode]

THE second answer is the right one i think

x1=desks and x2=chairs, x2 produced should be at least twice of x1 so: 2X2<=X1 so 2X2-X1<=0 is the right answer

@urban egret i wish you understand

[left knoll]

the answer would be pi/4, right?

[left knoll]

which Cengage book this from?

[urban egret]

Thanks for your help! but i think I now realize why the 2 must be with the desks. basically the number of chairs x2 >= 2x1 so this becomes 2x1 - x2 <= 0. If we consider it is an equality for better understanding, x2 must be equal 2 times (twice) the desks (x1)

[pastel geode]

you're welcome! if you have any questions just ask me.

[left knoll]

sorry for inconvience, motherducker me evaluated the value of arg w and thought of it to be of z

[pastel geode]

wait

[left knoll]

yo, you reporting me for bad lang or somthing?

💀

[pastel geode]

Nah!!! I just told you to wait in till I understand the question

[left knoll]

no worries, you could check my solution

[pastel geode]

i think this is the answer

[glacial bay]

Cengage 3rd edition in 2 color (trigonometry)

[left knoll]

beautiful

[left knoll]

Can sm1 explain the formula of this question

[soft lintel]

how can we use the term grouping technique to find the nature of a serie ?

calculus 3

[spark warren]

Hey guys can u help me?

[limber patrol]

Just started with trigonometry, im not sure if i should use cos or sin

[peak prairie]

you should use sin as CB is opposite from angle A, and sin is opposite/hypotenuse

[scenic silo]

hi~ could somebody help me with this question and how to do it?

[simple bough]

Wtf

[left knoll]

Lhopital’s rule

[spark warren]

Thanks man

[clever lodge]

use sin, sinA=sin58=bc/ac

[limber patrol]

ty

[strong jewel]

v23=5-2 ÷ 9

please help me solve

i found 43/9

[soft lintel]

Hey everyone, I have a question about vector matrix X=(x,y,z) I have to find a variable that is related to at least another variable by resolving a system for example if x=y then, X=(x,x,z). But I had A bit of a problem in a exercise. I found x=-y & x=(5/10)y & x=(-2/5)y

does this mean y=0 and x=0 ? pls I need an answer so I can finish this exercise 🆘

[elfin crest]

If you send the problem here, you may get a better help (well, not from me. Not yet...)

[left knoll]

Split the denominator

[left knoll]

Yes

[obsidian oracle]

hihi everyone, could help me to solve this question? i confused with the left hand side🥲

[topaz pier]

If I have a test of 16 questions and I have 39 minutes, how much time do I have per question?

[modest compass]

39/16 mins = 2 mins 26 secs

[peak prairie]

yo

what do you mean by long division

as in polynomial long division?

[sage osprey]

can someone help me with basic math? i feel so dumb :)

i work out of a book with a lot of mistakes but i dont know if i am in the wrong or the book

[grizzled lotus]

Can I get help with 14 b and c

[left knoll]

Does anyone know how to handle limits with 2 parameters?

[grave elbow]

can someone explain to me why the distance is 2.2

[left knoll]

It's not 2.2 it's 22. You get that by adding the distance between player A and player B to the distance between player B and player C.

[grave elbow]

i thought so too

my teacher did it wrong then

tysm!

[left knoll]

But it's says 22

No?

[grave elbow]

OH LOL

i thought it was 2.2 💀

[sage osprey]

can someone help me with this basic math :) i feel so dumb

i get it that root32 = 4 root2

but than the answer says this, i dont understand how they get that answer

2/3 root 3

[sage osprey]

√32= 4 √2 turns in to 2/3 √3

[left knoll]

I want to learn logarithms

[left knoll]

Bruh sorry i misread your question. No way in hell is\sqrt{32}=4\sqrt2=2/3.\sqrt3, either the answer you have is wrong or the question is asking for smth else

[sage osprey]

thats why i dont get it, i have a lot more

[obsidian oracle]

thank you so much 😆

[vocal flax]

Plzz solve question 60 anyone

Its urgent

😭😭😭😭😭🙏🏿

[strange adder]

can someone help me with some basic trig i completely forgot how to do it its been a while

[left knoll]

https://dontasktoask.com

[restive wedge]

lol

[left knoll]

im new to matrices i wonder if anyone can briefly talk about what is a 3d vector and if so where i can find any matrix notes or tutorials for beginners? sincerely thanks🐸

[vocal flax]

What to do after this!?

[wintry fulcrum]

You can keep this two triangles in mind

It will help you alot

I am not good at English.
I hope you can understand what I want to tell you. 🥺

[vocal flax]

Thx ✨✨

[sharp delta]

hello, when you solve polynomials by comparing coefficients is the remainder 1 degree less than the DIVISOR or QUOTIENT?

[spiral citrus]

Hey

Do we only chill in this room ? Question

Allowed to study also?

[vocal flax]

Didn't understand Plzz elaborate again

[potent crag]

1+2=

32/2 =
@candid moth

[peak prairie]

if you divide the max degree the remainder can be is 1 degree less than the divisor

[haughty palm]

"Calculate the work done by the gas in the cycle below."
someone can help me? i'm confused about this question, by the way, sorry if this is the wrong chat

[restive wedge]

how to do this?

[rigid solstice]

Guys can we change the position of this?is it gonna affect anything? Thanks in advance

[restive wedge]

@rigid solstice no affect, but write the signs correctly

it should be -2n^2-n+6

[rigid solstice]

Thanks man 🙏

[restive wedge]

np

[quasi vale]

Does anyone know how to solve this?

[scenic fog]

Hii would like to ask if anyone knows how to solve this? Much appreciated 😣🙏🏽

[dense stump]

i’ll pm u in a bit

[shadow oak]

if anyone knows shell method

much appreciated

nevermind I got it, I did a silly mistake with my integral bounds 🤦‍♂️ 🤦‍♂️ 🤦‍♂️

[median grotto]

do you think that's fundamentally contradicted?

cuz ~r and r cannot be thruth at the same time

[slim pier]

finding n of dishes sold of each dish

5n + n = 132
n = 132/6
n = 22

5(22)(128) + (22)(78) = ∑

[rigid solstice]

Is this solvable?

[woeful sluice]

No

[vagrant sonnet]

how do you solve for this?

i get lost at dy/dx (2y-2y)= -2x

[vagrant sonnet]

nvm

[lucid cairn]

I find e^3x-3 not the same result. Can someone help please?

[soft lintel]

just subtract (6x-4)-(3x+1)

[stone raft]

first you take dydx of both sides

[lucid cairn]

I found it thank you very much

[stone raft]

so it becomes

2*(dy/dx(xy)) - 2ydy/dx =0

[soft lintel]

Hey eveyone .Can someone pls help me prove this 🆘

[stone raft]

do you understand how i got here

its using something called the chain rule

wait oop i didnt read..

sorry

[soft lintel]

I get after simpification lim 1/[√nx(-1)^n] but how can I find the limit of (-1)^n ?

[lucid cairn]

Can someone explain how this works?

Like how did they arrive to this result

[celest laurel]

1/2x & exp(2x) become 0

So you just end up with 2/4 which is 1/2

[stone raft]

1/2x as x goes to infinitely small would be 1/a super large number which in the limiting case is just 0. e^2x when x goes to negative infinity would be 1/e^super large power which is also 0, so the entire thing simplifies to 2/4 which is 1/2. Zeytek is also correct 👍 👍

[lucid cairn]

Omg thank y'all so much!

[stone raft]

np!

[dark tendon]

W=pV

[dark tendon]

i can't do it, not enough information with this problem

[dark tendon]

oh work net

[cyan pine]

anyone, please help me ;-;

[solemn vessel]

x is 0

[soft lintel]

Hey, does anyone here knows of a channel that explains Pointwise and uniform convergence ? I need that ASAP pls :/

[flat bolt]

help

[flat bolt]

nvm

[spark warren]

Guys can u help me

[left knoll]

-1

[lapis furnace]

anybody know why it’s 0 =< k rather than 0 < k ?

[rich pelican]

I have to solve this linear system using matrices for when a is any number but 0

[left knoll]

work done by the gas is the area under the graph, so, the area of the rectangle+area of the triangle= 6+3/2 = 7.5joules

[mild pier]

can any1 help

[quiet vessel]

2a + 6b

[timber night]

Find area of the figure

[mild pier]

idk both

[stone raft]

So what would you put in the blank after 2x such that -3 is a solution

@mild pier

So if you plug in -3 it will become 0

And since it is a quadratic it has 2 solutio s

So 4x would have to be another solution so 4x = 0

Which means x = 0 is a solution

I will leave it up to you to find the other solution

Feel free to message if you are stuck

😄

[plain flicker]

hello! I'm a bit stuck here for C,, what would the workings look like??

[left knoll]

Hi guys, I need help with this task

[barren ferry]

find a common denominator

[solemn vessel]

406-x must be divisible by 1056

i.e., x will be negative in this case

you can also think about how modular arithmetic relates to the division algorithm

1056 goes into 406 0 times

so whats the "remainder""

[rigid solstice]

Can someone show me the solution of this question, please? I’d really appreciate it!

[grand wigeon]

😄

[grand wigeon]

hope this helps!

[plain flicker]

Thank you!

[left knoll]

Thank you sooo muchhh

[small osprey]

not sure what to make the upper and lower limits to find C, I know it's gotta be bigger than -1<x<1 but idk what

[hexed sluice]

can someone help ?

[ebon dune]

@hexed sluice i gabbled something but im sure its wrong

[hexed sluice]

Hmm thx

[ebon dune]

ohhh i made a huge mistake at the beginning

@hexed sluice

or x=6

[hexed sluice]

Ahhh

[ebon dune]

do you have the solution

[hexed sluice]

answer shows 1

[ebon dune]

😭

[hexed sluice]

my english is not very good so i can't explain myself very well sorry

[formal forge]

does anyone know how to do that

[ember steppe]

Hi, can you give some tips to learn math? PLEASEEEEEEEEE

[formal forge]

is anyone good with trig sohcahtoa stuff

[stone raft]

in general practice will make your math skills better

if you are not familiar with the content, then you should seek some online resources to learn the necessary material and then you can improve yourself even further by doing practice problems

[stone raft]

yes

well it has been a long time so i might be kind of rusty but i am happy to try to help

[formal forge]

can u help me find the hyp

[stone raft]

if you know the angle

then

you can simply do sin(35.91) = 1.15/x

and then you can find the hypotenuse

which is x

[formal forge]

dont u have to do

pythagorean theorem?

[stone raft]

yes thats also a possible application here

but since the topic is supposedly trig? you can use trigonometry to find as well

😄

[formal forge]

it said i got it wrong

lol

[stone raft]

?

which one

[formal forge]

the hyp

cause the angle is

39

[stone raft]

are you sure the angle is right

[formal forge]

its 39

[stone raft]

let me check that one

ok yes the angle is 39 degrees

can you tell me what you put

in as your answer

[formal forge]

39/1.15

33.91

[stone raft]

ok hold on that would not be right

do you know sine

?

ok

so

because the angle is 39

right

and the sine of 39 degrees would be opposite side over hypotenuse

so do you know how sine is defined

?

ok

so from your sohcahtoa

definition

sine would be opposite / hypotenuse

soh

like the equation would be

1.15/x=sin(39)

because 1.15 is the opposite side

x is hyp

and sin(39) is by definition 1.15/x

well

cos

would be

sohcahtoa

so adjacent over hypotenuse

so cos(39) would have to be equal to the adjacent side

which is 1.42

/ x

1.42/x=cos(39)

[stone raft]

hi

@formal forge

sorry

for late repsonse

that looks right to me

np

👍

[plain flicker]

Hey so what do I do for question E? The right answer's supposed to be 1564.5 but I could only get 179 using the same method as the previous questions D:

• what do they mean about including the arithmetic progression?

[bleak beacon]

the question says, how many rectangles are there that don't include the painted area?

[warped panther]

do you consider a square as a rectangle ?

[bleak beacon]

yes

[grizzled lotus]

How do they get the 11

[left knoll]

Help I joined class late

I don't know shit

[late root]

help

https://media.discordapp.net/attachments/582634203565260820/1029609202294984745/IMG_5209.jpg?width=929&height=167

idk what to do

[lime yarrow]

A

The answer is -x^2+9

Tell your teacher is it correct or not

[modern panther]

the power is the number of times its compounded

so in ex 3.3 (b) its compounded semi annually for 5 years and 6 months so that will be 10 times in 5 years and once in 6months so thats 10+1 = 11

[latent adder]

does anyone know how to solve part b?

[lime yarrow]

1\7 tell me if it correct or not

[lime yarrow]

adadwf

[left knoll]

secˆ2 x = 1 + tanˆ2 x
secˆ2 x - tanˆ2 x = 1
(sec x +tan x)(sec x -tan x) =1
sec x -tan x =1/7

[left knoll]

including the 10th term

sum of 30 terms - sum of 9 terms (9 terms bc we gotta include the 10th term)

30/2 [2(8)+(30-1)3.5] - 9/2 [2(8)+(9-1)3.5]

hope this helps :))

[twin ferry]

hi, im having a hard time understanding this u-substitution for my calc II class. where did the x in (-1/2x)dx go after substituting?

[left knoll]

It’s in the initial expression

[twin ferry]

yeah ik, but why isn't it in the substituted expression?

why not -1/2∫(x*sqrtu) du

[left knoll]

The first x in the numerator cancels with the x in the denominator

You even highlighted it

[twin ferry]

ohh so it's like ∫(-1/2x)(x* sqrtu) du, then both x cancel and it becomes -1/2 ∫(sqrtu) du

i didnt realize that, thx

[left knoll]

Yep that’s it

[latent adder]

the probability distrubution for this q is putting me off

would A still be 1/6?

and b = 0.2?

[plain flicker]

AH I wrote 13 instead of 30 😭 totally misread the question, thank you so much!

[left knoll]

no problem :))

[grizzled lotus]

How to do number 4.

4. 41,411.98

[plain flicker]

Any tips on finding formulas? I've been stuck in h) and i)

[quasi nova]

How to be good at math

Any solutions please

[jaunty monolith]

Can someone tell me what to do or how to to Q10

Any advice would be helpful thanks.

[light night]

Maybe this help you
https://youtu.be/TpBn9kO9JnA

[daring mauve]

X cant not 0

I think cái phân thức mẫu phải dương

[dusk gorge]

Its really asking you to break the h(x) function into 2 parts, for example. Imagine h(x)=4x²+4x+1. You could think about breaking it into g(x) = 2x and f(x) = (x+1)², since when you plug 2x into f(x) you'll get 4x²+4x+1. Now you have to think the same kind of stuff but for the function provided by the question

[dark tendon]

break the h(x) to f(x) = 2^x and g(x)=x-x^2,

ok so you can solve the fog easily

f of g

[lime yarrow]

@vestal ravine lets go

@vestal ravine abdul where r u dont hide

[solar pilot]

How can i factor everything in the parentheses more to remove the square of x

[surreal cypress]

Oh

[stone raft]

which 2 numbers multiply to 6

but add to -5

[hollow mulch]

I will give you a short trick you can solve any quadratic equation with help of it.
For ax²+bx+c
Use this formula to find it's factors.
[{-b+(b²-4ac)½}/2a] , [{-b-(b²-4ac)½}/2a]

[plain flicker]

I can't figure out how num 11 is supposed to go! Just the solution for 11. a) would be wonderful 😭

[dusk gorge]

I actually don't know much about modular arithmetic but I suppose this is asking for the multiplicative inverses mod 7, that is, for some number a, a^-1 is the number that a * a^-1 = 1 (mod 7). So taking (a) for example I believe it should be 4, since 2 * 4 = 8, which mod 7 is 1. Then you can do the same for the others(note that it may not exist)

[soft lintel]

Qu'est qu'on appelle le reste d'une série numérique convergente (Rn=S-Sn) en anglais svp ?

[dusk gorge]

No hablo Deustch

[shadow wasp]

can someone help with this problem
What is the equation of the line for the given point and slope:
m=2 Given point (1,0)

[light lagoon]

help on the first question? still struggling on this topic on physics

[left knoll]

write v(t), it will contains a(t) in it, substitute the a(t) given by the questions and solve for v

does it work? i didnt try but hopefully it did so we dont have to do calculus

[light lagoon]

I’m struggling w finding the v(t) equation with a(t) in it

Would v(t) be 0.65t^2 + 2.7t?

[left knoll]

v(t)=a(t).t+v_0
a(t)=1.3t+2.7
v(t)=1.3t^2+2.7t+v_0

[light lagoon]

got it thanks! it’s 24m/s

[plain flicker]

I'll try it out! Thank you so much!

[left knoll]

th

[fiery swallow]

can someone help me with this?

[left knoll]

Split the sum on the numerator, divide both the numerator and the denominator by the corresponding “letter”, substitute the ratio and you’ll have it

[vagrant marsh]

I need help from a British student, can you help me please

[lime yarrow]

ITs only half.its the answer

[lime yarrow]

U can find the method

[restive wedge]

someone help plsss

how to prove?

[left knoll]

yeah thnks

[warped bolt]

just take a=2b/5 and sub

[kindred peak]

Help

Prove that :

a,b € R+

[kindred peak]

?

[plain flicker]

quick question can someone do 12KG(base 20) + 1DH9

Isnt value of K = 20? I'm lost somewhere

[restive wedge]

part 2 is bugging me

one solution is cos2x=1 for 0<=x<=pi

and cos2x=1 is giving 3 solutions which are 0,pi, and 2pi

but they didn't include pi in the mark scheme

[drowsy lion]

Can someone help me with this, first term is 217 and ratio is 2/3

[restive wedge]

n is 15

just input values of a and n into sum till n terms formula and then apply inequality

of less than 650

[kindred peak]

a,b € R+
Prove that :

[grizzled lotus]

How to do 2a)? The answer is 11.39%

[hollow mulch]

This is 81. I had send the solution of 82 , Your doubt was in 82

[hollow mulch]

This is one more solution. I discovered it just now.

[hollow mulch]

One silly mistake is their
It will be 3t²+t-4

[tiny scarab]

21/7 so 3 is your final answer

[tiny scarab]

any precalc chads have any idea what im supposed to do here? Im totally confused

[fierce lake]

@tiny scarab

I'll assume this is a right angled triangle. This means you can apply Pythagorus Theorem to find x. Don't forget to sub it back into the x+1 and x-1 formula

[restive wedge]

its supposed to give numerical values

nvm I did it

my teacher explained it today

[hollow mulch]

Solve the quadratic put it into the assumed expression you'll get the answer.

I thought that you'll solve ahead by yourself that's why I didn't put the whole solution.

[sullen nexus]

I am not sure how much context I need to give, but theta is the function of a laser that is positioned 500cm away from a wall, pointing at the wall and moving. The first picture illustrates this and followed with the assignment. I have calculated the function for how the laser moves with time(t) t=(seconds) and derivated it to find the angle in degrees it moves also. Now the solution for the second picture the lim, is zero, but my question is how would you interpret it. given the laser moves for an infinite long time the speed at which the laser moves is zero... now I want to say something silly like the laser would stop working after a while, but what do you think?

[unkempt sleet]

Suppose a box contains 7 purple balls, 9 red balls, and 13 green balls. If three balls are selected at random from the box without replacement, calculate the probability that all three selected balls are of different colors.

need some help

[left knoll]

wait have u learnt permutations and stuff?

[restive wedge]

I got one answer as -1/4 and one answer as -3/4

but -1/4 is being ignored by Mark scheme

idk why they discarded that solution since fg(x) would have a domain of <0 so what am I missing?

[restive wedge]

nvm

[light lagoon]

Can anyone help me with setting up a sigma notation problem with 6 left endpoint rectangles for this problem?

[merry crag]

=tex \int_{95x²}^{34x} x^2 dx

integral:
=tex \int_{95x²}^{34x} x^2 dx

[muted zodiac]

Could someone lead me in the right direction on this? I must be having a brain fart because isn't this not a constant rate of change or am i doing the math wrong somewhere?

Okay actually I got it right but I'm still confused because if I do the change in f(x) / change in x shouldn't they all be the same after simplifying?

Nope I definitely just mental boomed and wrote down the wrong change in f(x) i'm dumb lmao

Thanks Tai

Yw

[quasi vale]

anyone can help me with c?

[dusty raven]

Is anyone good with differential transformations such as lorenz transformation?

[left knoll]

https://dontasktoask.com

Please still post the problem you have, I’ll see if I can do anything

[vast cove]

Its late but you just need to find 5/the range of f to find the answer of c

[grizzled lotus]

How does a get 7427? There is the solution but I don’t understand

[muted epoch]

F = P(1 +i)^n
.06/12 = .005 = i
8888 = P(1.005)^36
P = 8888/((1.005)^36)
P = 7427.21

[muted epoch]

The yearly interest rate must be divided by the period within the year it compounds. Always assume an interest rate is for the year unless it says "X% per month." This problem doesn't say that. "6% compounding monthly" is short for "6% per year compounding monthly." Hope that is clear. The math follows easily after that realization.

[potent moon]

please someone help sorry for rotation.

like i feel like i solved it but can’t be sure and it’s killing me

[muted epoch]

Can you show your work?

h'(x) = 1/3 * d/dx [x*f(x)*g(x)]

Do you know how the product rule works for three differentiable functions?

d/dx[x*f(x)*g(x)] = x'f(x)g(x) + xf'(x)g(x) + xf(x)g'(x) = f(x)g(x) + xf'(x)g(x) + xf(x)g'(x)

So h'(x) = 1/3[f(x)g(x) + xf'(x)g(x) + xf(x)g'(x)]

[halcyon tide]

anyone familiar with stochastic volatility models (in combination with ornstein-uhlenbeck process)? if so, please dm me, i have some questions ^^

[restive wedge]

can we not use cross product for finding P and Q position vectors?

[raw imp]

3. translation
   Solve 2nd type of curved integral …. Where G - ellipse arc …. In positive direction(dunno how to translate but going against clock path)

I don’t understand why you can’t use green theorem here could someone help me? I’m trying to figure it out for the second day.

[junior egret]

Can anyone explain why the 1000 needs to be square rooted in the answer to a to find variance?

[lost breach]

Hm

A bit late

However :

Hope it helps.

[glossy sentinel]

I need help with this could anyone help me

[fast otter]

anyone know how to graph this

[drifting siren]

can someone check my answers?

[twin ember]

Is anyone online here

#math-help

[edgy flame]

looks good

[patent mason]

If someone is willing to give me the rundown on how to solve one of these problems step by step w/o a calculator that would be nice!

[lofty arch]

Var = SD^2

[viscid marsh]

can anyone explain ?

[tulip bison]

tan2 (5x)'= 2tan 5x .5 (1+tan 2 5x )

is that right?

[idle heron]

does anyone know what kind of graph this would be

[ruby birch]

hiya does anyone know why

it isnt a?

this was my thought process

[left knoll]

yes

[ruby birch]

so the computer is wrong, no?

[left knoll]

yep

[ruby birch]

or the system

yeahhhh

okay thankss

[finite ember]

yes

[surreal cypress]

The answer is yep yes yep yeah

LMAO

[hardy kite]

hello! I've been stuck on this math question for a while and have no idea how to solve it:

Here's my attempt:

[hardy kite]

nvm I just got it :')

[grave elbow]

this is the answer and the question was: tan^2(theta) - 2tan(theta) - 10 = 0 but i don't understand how they're finding the solutions in the quadrants

can someone explain this please?

[meager sleet]

whats a parabola called that looks like this

[past sand]

I believe this is a negative sine graph

[past sand]

(2 - √44)/2 gives you a negative number and tan is negative in the 2nd and 4th quadrants. (2 + √44)/2 gives you a positive number and tan is positive in the 1st and 3rd quadrants

[nova sun]

It could also be a polynomial to the third power

So I’m doing optimization and I’m used to setting up an extra formula with a known variable (like if I know perimeter and need to find area) to get everything in a formula in the same variable so I can take the derivative. But idk what to do for this problem, is there some kind of trig fact or formula I should know?

[sharp night]

Try factoring n^2 - 5n + 6 as (n-2)(n-3), then you know that (n-a)! / (n-b)! has to be equal to (n-2)(n-3)

so then you need to find a way to rewrite (n-a)! in such a way, so that you can simplify the fraction to get rid of the factorials

(n-a)! = (n-a)(n-a-1)(n-a-2)!

[meager patio]

a = 2, b = 4

[late root]

hello

can someone help me with this question?

y derivated and replaced x with 0

but it is saying that the answer is incorrect :(

[rigid solstice]

Can someone please help me explaining how to do this question, .?

[tight kernel]

you must do it by part and then do the study of the sign

(x-1)² <0 and x+2<0

after finding the roots of the equation, you will plot the graph and check, based on the intersections, in which parts the result is negative

[grizzled island]

anyone understands maths in french please?

[muted zodiac]

What am I supposed to do to get the aroc with only one point?

[vast cove]

What do you mean?

[left knoll]

I think he means average rate of change or the gradient or the slope of the equation at [-5, 1]

[muted zodiac]

Yeah I thought it was a point and didn’t realize it was an interval lol

[raw moss]

anyone knows the b part

[vast cove]

Its 21 months i think

[silk tulip]

does anyone know graph theory? like dijkstra's algorithm demos?

[left knoll]

anybody here you is doing high level maths, what is your technique for not forgetting the basic things? (this question might sound stupid)

[warped panther]

u always use the basic things that why u never fogetting

[warped panther]

wdym demo ?

[left knoll]

not always per say

[warped panther]

I mean high level math is for me some basics things somed up to create a complex one

not always but most time

and yeah sometimes u need to come back to the basics to fully understand a thing

[swift geyser]

anyone know how to do this? pls dm 🙏🙏🙏

[steep spade]

can anybody help me with my math problem? im literally crying rn

[warped panther]

check ur dm

[vast cove]

You can use Geogebra it helps graphing stuff.

[vast cove]

Send dm

[swift geyser]

i didn’t get anything

[warped panther]

or dm me u ll see

[patent mason]

I’m having trouble on finding the vertex of this equation when there’s decimals… could some someone show me the step by step process? 🙏

[warped panther]

What is the -2,875 ?

ho nvm its just y coordinate

[warped panther]

here you go

2 methods

and after u just have to replace x=3/4 in your function to find y coordinate

and so u have both

[patent mason]

I got it now, thanks for the help!

[night kindle]

Hey guys

How to find the Inverse of this one?

(x+1)/(x+2)

It's kinda special one

[sick cave]

QUICK QUESTION IN LINEAR ALGEBRA is the column space or span equal to a matrix?

[warped panther]

its ((x+1)/(x+2))^-1 --> (x+2)/(x+1) isnt it ??

[warped panther]

or u mean function inverse like f(x) = y --> f^-1(y)=x ?

if u are talking about inverse function I find that
I tried to be clear tell me if u dont understand

[night kindle]

Wait

Lemme try this

Wait am i wrong?

Oh it's misunderstanding i sorry

[warped panther]

Ho wait yeah I calculated x+1/x+2

[night kindle]

But can u tell me if this one is true?

[night kindle]

Yeah sorry it's x+2/x+1

But i'll try the inverse :]

Btw thank u so much

[warped panther]

and I even make a mistake if u try this one u end up with +2y

[warped panther]

yeah Its correct I find

x = (-2+y)/(1-y)

its the same

[odd wave]

Can someone help me solve this equation that is in the complex numbers system? I can't reach the result given by wolfram alpha in any way.

[vast cove]

I would try each one of them after the z(z+3)=10i part

I dont think this is what you are looking for though

[clever mountain]

Hello everyone

Can someone explain to me why this limit gives me 1?

I used symbolab

[warped panther]

Search for Sotta method

[warped panther]

Hmm maybe

lim x->0 ln (x) --> −oo

So we consider −oo/−oo = 1 ??

but its rly weird, Idk

[clever mountain]

I know... it doesn't have any sense

https://es.symbolab.com/solver/step-by-step/\lim_{x\to a}\left(\frac{ln\left(\sqrt{x}-\sqrt{a}\right)}{ln\left(e^{\sqrt{x}}-e^{\sqrt{a}}\right)}\right)?or=input

And the worst thing is that when I graph it in Geogebra it tends to something like 1.04

I made a mistake with that last one

[delicate patio]

{ [ (−𝑞 → −𝑝) → (−𝑝 → −𝑞)] ∧ −(𝑝 → 𝑞)} ∨ −𝑞 ≡ −𝑞

Help:'(

[floral surge]

I got stuck on this, can anyone help me?

[vast cove]

Are you trying to find a number?

[grizzled quarry]

Hi!
How are you?)
I'm looking for help in math, so if you can help please dm me, thanks !!

[warped panther]

in which field ?

[grizzled quarry]

It's algebra

[noble trail]

help s’il vous plait

[regal hedge]

Take sin² and cos² as any algebra (say a , b ) ; solve by using a³+b³ property then

[regal hedge]

Range is maximum - minimum
So, 40-a= 14 , a= 26

[noble trail]

ok, thanks that has put me on the right lines @regal hedge

[regal hedge]

Median will be average of 2 middle terms i.e a,b
(a+b)/2 = 40 , a was 26
So now , b=54 @noble trail

[regal hedge]

😉🥰

[noble trail]

Wait a min, i thought that you’d just do (52+40+b) / 4 = 30 and then solve for b which equals 28

[ember garnet]

that would be the average, not the median

[noble trail]

oh shit

Didn’t read the question properly haha

[regal hedge]

[noble trail]

swear that has cost me so many marks lmao

[left knoll]

Heloooo anyone got an idea how to prove the first question a)

It seems that a) cant be proven idk... so maybe a disprove

[vast cove]

Does it give any info for a and b?

If it does not i will go with false because you can't prove that B=(AnB)

[sharp night]

Something like this i guess

[fierce light]

Anyone has any idea on how to do this? Ive been stuck for quite a while haha

[left knoll]

Nope,,

[left knoll]

Ayoo thank you very much so the second is made wrong by me ?

So We always try to take an element from the left set and try to show that it is also existing in the right

[left knoll]

Then this wouldn’t be a real prove I guess

[sharp night]

well thats one way of doing I suppose

It is way easier to prove that the statement is false (counterexample ❤️ ), but in this case both of them are true

[sharp night]

i think this could also work

but yes, most of the time when you try to solve X = Y, you have to solve X ⊆ Y and that Y ⊆ X

and you can do it this way, by assuming that there is an element that belongs to X, then finding out when it is true and proving that it also has to be an element of Y, so X ⊆ Y and then the other way around

at least thats how I usually do it

But for harder problems, I make a venn diagram of both sides at first and see if the statement is true, if it is not I try to find a counterexample

[fast otter]

someone pls help

[past sand]

(assuming u is in degrees)

You can just find u then use calculator to figure out tan(u/2)

sec(u) = 15.241, so u= cos^-1(1/15.241)

Therefore tan(u/2) = tan[(cos^-1(1/15.241))/2]

= 0.9364

[left knoll]

Thank you verrryyyy much you helped me a lot. Is a Venn diagram accepted as a prove if it’s true ?

[left knoll]

thank u so much i had a brainfade moment and took 4 as the number of clubs

[vast cove]

No probs i also had my moment when i forgot how many cards at there in the pack

[sharp night]

Hmm, not sure about that one, but I don't think it is that sufficient of a proof.. If I speak from my experience tho, we are always asked to provide a more thorough proof than just drawing Venn diagrams. But as I said, I mostly only use them to make things faster and so that I do not try to prove something is true if it is actually false, since finding a counterexample is often faster than writing the entire proof

[left knoll]

Ahh now I got it, so you don’t have to spend time on trying to prove smth❕❕

[fast otter]

thank u so much

u saved me

[random moat]

could anyone help me with this?

[half gate]

does anyone know what this symbol is? i'm doin' analysis homework and this is the first time seein it.

[rotund vessel]

it seems like an infinitesimal function, but it's not accurate

maybe f(x) = x + o(x)

[regal sentinel]

Uh i am stuck how do h solve this 🙃

[half gate]

i think that's it, tysm.

[ruby birch]

guys is my teacher wrong lol

it says mixed radical but they simplified it as an entire

[iron flare]

is wrong...

[rotund vessel]

lol, I didn't get it either. I tried to simplify it, but it only got harder

isn 't it possible to write in the ’arctan(2) or arccos(-3)’?

[magic flame]

if tan(63,43494882)=2, then tanx-2=0

[sick cave]

hi everyone, I really need help with calculus 1, the function continuity proof and lipschitz condition, I am really stuck, If you have anything that could help, please send it to me. 😓

[rotund vessel]

I have a textbook with proofs, but it's in Russian

[steep spade]

does anybody know how I can proof this?

[frosty fog]

Differentiate twice using lhospital rule

or you can do it intuitively the rate at which denominator is increasing is more than numerator

[frosty fog]

only 1 solution arctan(2)

cos can only have values from -1 to 1

so it cant take the vvalue -3

[steep spade]

so equals 0 is correct right? because it gets closer and closer to 0

[rotund vessel]

thank you for your attention, I didn't take this moment into account

[frosty fog]

Yess

[wanton river]

Use real analysis

To prove the statement.

[jade maple]

would ths count as engineering help?

[versed orchid]

Hi, can somebody help me with this problem? Been stuck with this for hours. Tried Trapezoidal, Simpson's method and series expansion.

[vapid hill]

7

[versed orchid]

?

[rich pelican]

anyone knows abt vectors in space??

It's in spanish but basically they give u 2 vectors modules and the module of u-v and ask what's the angle that the vectors u and v make

[rich pelican]

thank u sm

[rich pelican]

what formula did you use??

[vast cove]

Cos theorem

[rich pelican]

whyd you do -1/2?

[vast cove]

Bc its part of the theorem

a^2 + b^2 - 1/2 * cosx * a * b

then square root it

Thats your theorem

[rich pelican]

oh thank u

[vast cove]

No probs mate

[left knoll]

yo might be a dumb question but can someone explain surjective, bijjective relations

[vast cove]

Every bijective is also injective

But bijective is plus surjective which injective does not

[left knoll]

yo thanks

[vast cove]

Yes

You want to ask me a question?

I see

I am also half German tho

Well it is kinda help chat so

You can dm me if you wanna talk

[left knoll]

yoyo i got one more thing in my shcool book itsays that the relation less than equal on the set R of real no that is Reflexice, Antisymmetric and transitive. I wanted to ask, what the hell does that mean

[vast cove]

Can take a picture and dm me?

That would be better

[left knoll]

k

bro its cool i understood reflexive

its just the language give in my school book that is annoyin me

tru tru i basically learnt all of relations cus of yt

[vast cove]

I mean probs i know what is this but

[left knoll]

i sent a pic in dms

[vast cove]

Thats lots of terms man

[left knoll]

ik that is why my brain frying

[vast cove]

Well that pic just fried my one too

[left knoll]

gret ill just ask my maths prof. thanks for trying

[vast cove]

Let me try a sec

[left knoll]

dude if one of u can tell me the reason for the answer of this question i will die

Q. The relation > is

Ans. Transitive

Reason?

[solemn vessel]

Do you still want an explanation

[solemn vessel]

if a>b and b>c, then a>c

now to write the proof, I suggest at first thinking of some concrete examples that you know are true so that you can understand it well before you try and prove the general case

For example, 5>3, 3>2, so 5>2

[sick cave]

epsillon delta proof

[sick cave]

oh wait just epsilon since it goes to infinity

[sick cave]

let me solve it for you

[orchid relic]

i can explain it to you if you still want too, got the same material two weeks ago and my prof explained it very good

[left knoll]

no im good thanks

[cloud night]

Hi can someone help me with q14?

[heavy meteor]

@cloud night do you think the angle is important to find the value of the expression?

[vast cove]

(14-10√2)i , (-6)j

[left knoll]

Hello, I tried almost everything but I’ve got no clue now:/

Maybe smone can help me

[solemn vessel]

take an element of M, call it m, and its image f(m)

Now, use the fact that M\subset N to relate these facts to N and f(N), respectively

this proof follows closely from the definitions

hint:
M\subet N implies that \forall m\in M, m\in N.

[sullen verge]

hii
can someone explain to me why
abs(e ^z) = e^Re(z)
z being a complex number

ohhh nvm got it

[cloud night]

I have no idea

[solid yew]

Hello. Do you guys know how to solve this sum in order to find a general formula? If not, can you help me solve this limit instead?

[patent mason]

If I was dividing by something like (x-1) it would make sense but I'm a little confused on how to divide it with (2x^2+5).

[quasi tapir]

on ex. 3 , its ok?

[quasi tapir]

nu imi vine sa cred coaie

[loud tusk]

ur airpods seem dead

[solid yew]

Huh?

[exotic cobalt]

mathematics

[left knoll]

Im still don’t know what to do ngl 😭

Got it now 💀

[solemn vessel]

great

[gritty cloud]

help please

how this happend i dont understamd

[ember garnet]

You multiply the numerator and the denominator by e^y

[iron flare]

Help please

I already did polynomial decomposition ,i’ve got 11a=99-9b

[coarse stratus]

Q is written incorrect

[royal marsh]

helloo o/ i have a quadratic function and all the info i'm given is that it has a point that intersects with the x-Axis at (-2,0) with the tangent line y=9x+18, and another point at (8,-10) with the tangent line y=-11x+78. How am i supposed to use this to find the derivative of the function?

[royal marsh]

nvm i got some help with it now

[boreal bridge]

Evening. Could someone from economy, nutrition, or mathematics please help me with a economy question about marginal cost function?