
Please post any and all homework or other textbookstyle problems in one of the Homework & Coursework Questions...

Feb2313 09:24 AM
micromass

1 
46,194 
This is a general question, I guess. If I am given an infinite series, how do I go about finding its sum using Fourier...

Apr708 10:44 PM
quasar987

1 
1,138 
Could anyone please explain how to solve the improper integral below?
I have no idea of how to do it.
If f is a...

Apr808 02:44 AM
davedave

21 
3,747 
I'm working on this problem
x^5/6+1/(10x^3)
and I got the equation:
sqrt(1+(5x^4/63/10^4)^2) or...

Apr808 07:49 AM
dexteronline

5 
9,263 
f(x) is a continuous function of x, whose domain is . Revolve the graph around the x axis. In doing so you will...

Apr808 07:51 AM
dexteronline

7 
6,227 
Why does this work? http://functions.wolfram.com/ComplexComponents/Abs/21/02/02/0001/MainEq1.L.gif
Or maybe a...

Apr808 02:36 PM
Feldoh

5 
1,357 
given the series
g(x)= \sum_{n=0}^{\infty}\frac{a_{n}}{\sqrt {xn}}
where the coefficients a_n are real...

Apr808 03:31 PM
mathman

1 
1,153 
Suppose a surface in R3 is continuous on a certain interval and two points are selected within that interval, how...

Apr808 07:44 PM
math20

0 
1,918 
I am trying to find the first and second derivative using the chain rule of the following:
u sin(x^2)
This is...

Apr808 07:50 PM
math20

1 
1,670 
Ok.
So I need two questions answered so i can check answers with what u guys got.
1. a. On Earth, you could...

Apr908 09:35 AM
HallsofIvy

3 
5,756 
if you put the differential dx, dy, and dz in the front of the integrand how do you order it so that it matches the...

Apr908 09:48 AM
HallsofIvy

3 
2,860 
Hello all,
I've got an exam tomorrow so any quick responses would be appreciated. I'm following the Boas section on...

Apr908 08:25 PM
FiberOptix

1 
4,817 
What exactly is the difference between "increasing/decreasing" and "strictly increasing/decreasing" ? is it similar to...

Apr908 10:06 PM
seroth

6 
2,124 
i'm stuck on this relatively simply integral for a differential equation problem ...
 du / cos(pi/4  u )...

Apr1008 05:19 AM
Gib Z

2 
886 
Hi all,
I need help.
What is the difference between
\int_{0}^b x^2 dx

Apr1008 01:20 PM
sutupidmath

2 
1,179 
Hi,
I feel really silly for asking this question... but can anyone give me any advice on how to evaluate the...

Apr1008 01:49 PM
vertices

1 
1,404 
I'm looking for help with my conceptual understanding of part of the following:
1) If a series is convergent it's...

Apr1008 08:46 PM
ircdan

3 
8,595 
I'm trying to figure out what is meant by parametrizing a path, and how it would be done for a function of multiple...

Apr1108 07:05 AM
HallsofIvy

3 
2,487 
Considering the composition of two functions ƒ · g
If g is even then does this mean that ƒ · g is even? why?
Or...

Apr1108 09:29 AM
HallsofIvy

9 
12,319 
Important stuff:
\sum i^2 = \frac{n(n+1)(2n+1)}{6}
\sum i = \frac{n(n+1)}{2}
And the solution: (Where I write...

Apr1108 11:51 AM
paralian

2 
1,878 
My question is simple :
Suppose that f is in C^\infty(U, ) where U is an open of R^n .
Is there g in...

Apr1108 05:00 PM
mathwonk

3 
1,220 
Hi
I have a question about rearranging the following equation (I saw this in a finance book):
If we rearrange...

Apr1108 06:56 PM
exk

6 
4,172 
I am confused about the right formula for this. Is it
R_{n} \leq T_{n} \leq\int_{n+1}_{\infty} or R_{n} \leq...

Apr1108 09:13 PM
motornoob101

0 
5,357 
we have f(0)=1, f '(x)>=f(x)
we shall prove f(x)>e^x for every x>=0
thanx to the solvers

Apr1208 06:32 PM
ice109

8 
1,362 
I'm doing some work with vectors, and essentially, I have two vectors: a large vector and a unit vector pointing in a...

Apr1208 09:21 PM
_Nate_

6 
8,904 
Is Martingale difference sequence strictly stationary and ergodic?
It seems to me that Martingale Difference Sequence...

Apr1308 02:20 AM
sandhammaren

1 
6,240 
The theorem of pappus seems too simple that i do not get it.
ok
suppose I have the 1. (x cm., y c.m) meaning i...

Apr1308 10:06 PM
blumfeld0

6 
5,485 
I'm doing a calc BC practice exam and I found this question that stumps me to the max:
The function y=x^4+bx^2+8x+1...

Apr1308 11:10 PM
lurflurf

1 
1,481 
I have some problems with Intergration. Hope can get help in here. If I posted on wrong board, please forgive me.
...

Apr1408 01:50 AM
zhentil

1 
969 
When doing complex contour integration one can use the CR formula or the Laurent series and find the first...

Apr1408 02:02 AM
zhentil

4 
2,013 
Here is the problem:
Suppose that g is a diffeomorphism on R^n. Then we know that its jacobian matrix is everywhere...

Apr1408 07:57 AM
ObsessiveMathsFreak

4 
1,923 
I'm having trouble trying to setup this double integral. The question asks to find the volume of a solid enclosed by...

Apr1408 06:45 PM
Pere Callahan

2 
5,785 
I need help identifying if it converges or diverges or conditionally converges.
...

Apr1408 06:55 PM
Pere Callahan

4 
1,277 
I've been having a problem finding the intersection points of the following polar equations.
r=1+3sin(theta)
and...

Apr1408 07:55 PM
epenguin

4 
9,915 
How would you compute the derivative of cos(t^3)? Would you use the chain rule? Does anyone have a good way of...

Apr1508 12:11 AM
ice109

2 
3,016 
Use Taylor's theorem to determine the degree of the Maclaurin polynomial required for the error in the approximation...

Apr1508 12:54 PM
lurflurf

4 
6,730 
the Residue theorem states that :
\oint {f(z)dz} = 2\pi i\sum Res f(z)
and the summation is taken for all the...

Apr1508 03:24 PM
mmzaj

4 
2,667 
Let be the integral
g(x)= \int_{\infty}^{\infty}dy \frac{f(y)}{ xy^{1/2}}
for given values of 'x' does it...

Apr1508 03:30 PM
Pere Callahan

1 
1,448 
Um I don't know if this is the right forum to post this but w/e:
I'm taking calc BC right now as a junior and my...

Apr1508 07:11 PM
TheMonster

7 
1,556 
Hi, the AP test is approaching and I'm struggling with these two Calculus questions and need some guidance. If you can...

Apr1608 12:06 AM
ice109

1 
4,590 
I'm trying to figure out a formula for this sequence problem, rather than doing this over and over 1,000 times. Does...

Apr1608 03:22 AM
ae4jm

11 
6,291 