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

Feb2313 09:24 AM
micromass

1 
46,618 
(Let me start by saying this: I am not good at math, nor have I ever been. What I want to do is simply an experiment...

Sep610 01:45 PM
deluks917

7 
2,140 
I was considering taking linear algebra alongside multivar. calc this fall term. I really enjoy calculus, but I was...

Sep610 10:55 AM
HallsofIvy

1 
1,230 
Hey all:
I know the best way to learn mathematics is by practicing questions and just do them over and over again. ...

Sep610 12:47 AM
paulfr

3 
1,039 
how could we calculate the follwing integral ??
\int_{0}^{\infty} \frac{ K(x)}{Q(x)}dx
here K(x) and Q(x) are...

Sep510 07:39 PM
paulfr

3 
872 
I am trying to understand the derivation of the divergence formula in cylindrical coordinates. This paper does a good...

Sep510 03:23 PM
raj2check

3 
23,224 
I'm trying to sort out the integral:
\int x^{2}e^{ikx}dx.
At first, I thought I would have to solve it...

Sep510 06:36 AM
Morberticus

26 
3,049 
I am not an expert in math, but as an electronics tech we use sinewaves all the time. I understand how it is derived...

Sep410 04:22 PM
tomelex

2 
1,039 
If you're given a sequence \{x_n\}, do you have
\sup_n x_n = \lim_{n\to \infty} \left( \max\limits_{1 \leq k \leq...

Sep410 01:27 PM
Landau

5 
1,565 
Hi,
Is there a function holomorphic on the open unit disk and continuoes on the closed disk such that f(z)= 1/z on...

Sep310 11:15 PM
mathwonk

3 
1,100 
I have to solve an ODE with variation of coefficient technique. It's pretty easy but I have no clue what is the first...

Sep310 11:12 PM
mathwonk

10 
9,033 
Hi All
I'm in the process of developing a phase control circuit. I need to know the specific time that corresponds...

Sep310 05:18 PM
klondike

1 
2,964 
i've got the following problem
let be the integral \int_{R^{3}} dxdydz \frac{R(x,y,z)}{Q(x,y,z)}
here R(x,y,z)...

Sep210 02:18 PM
zetafunction

4 
1,133 
Hi,
I am trying to prove that t goes to zero in the limit that a goes to infinite in this equation:
1/a \, \, ...

Sep210 01:46 PM
starthaus

24 
2,993 
I am trying to find the centre of mass of a projectile nose. I profoundly suck at integration, but I have managed to...

Sep210 11:56 AM
tuoni

12 
2,796 
Say I have a curve is called C: y=1287*x^1.5
Find a tangent line to the C, and the tangent line has to have a...

Sep210 08:05 AM
Mentallic

7 
957 
Suppose f(n,p)=integral(n!/(x! (n  x)!dx, for x from 1/2 to p)
where n>1, p<n+1/2
Are approximate formulas known...

Sep210 02:36 AM
JJacquelin

3 
1,118 
find x for y=5
y = (((e^x)/(e^x))/2) + ((e^x)/(e^(3x))
all i did was a^m / a^n = a^mn
i get here y =...

Sep110 09:08 PM
Mentallic

1 
1,803 
I am reading the definition in wiki ( nothing better at the moment)
http://en.wikipedia.org/wiki/Lorentz_space
It...

Sep110 05:34 PM
zeebek

0 
716 
\oint_{\Delta S}\vec{E}\cdot \vec{dS}=const \int_{\Delta_V}\rho dV
\Delta S surface which surround domain \Delta V....

Sep110 10:57 AM
Petar Mali

2 
847 
It is well known that limit of function can be converted to limit of sequence. I wonder if it still holds for limit...

Sep110 10:02 AM
Office_Shredder

5 
2,903 
Hi, I'm stuck on this problem:
\int{\frac{1}{z^4+1}}
Writing it as a product of its roots, we get:
...

Sep110 08:58 AM
HallsofIvy

3 
1,936 
We were discussing them in my math methods class today however I'm not really sure how the idea works.
Does anyone...

Aug3110 06:50 PM
Office_Shredder

1 
1,979 
Hi all, perhaps someone can shed some light on the following sum:
...

Aug3110 06:33 PM
Hurkyl

1 
815 
Find the equation of the normal line to y = 2cos ( 4x) at x = \pi / 3
I dont even know where to start with this...

Aug3110 04:29 PM
adriank

5 
3,570 
What is a good textbook on real analysis that has either a solution manual or solutions in the back. I have Rudin's...

Aug3110 07:59 AM
sachinism

7 
12,701 
Why the serie \sum\frac{1}{n} diverges and the serie \sum\frac{1}{n^{2}} converges? I'd appreciate an explanation...

Aug3010 03:59 PM
atomqwerty

4 
1,328 
A sequence \{x_n\} in a metric space (X,d) converges iff
(\exists x\in X)(\forall \epsilon > 0)(\exists N \in...

Aug3010 12:46 PM
JCVD

5 
1,482 
In the prove of \vec{r}(t) \;&\; \vec{r}'(t) \; is perpendicular:
\vec{r}(t) \;\cdot\; \vec{r}(t) \;=\;...

Aug3010 12:50 AM
yungman

3 
2,861 
Assume the situation in which I have a slope, a component of a function dependent on x and y, which is at an angle to...

Aug2910 09:14 PM
LukeD

8 
1,885 
Goal: to show yn=x
This particular part of the proof supposes that yn>x. So we want
an h>0 such that (yh)n>x
...

Aug2910 08:24 PM
epenguin

3 
2,439 
Hello all,
I am wondering the implication between almost everywhere bounded function and Lebesgue integrable.
...

Aug2910 06:02 PM
wayneckm

3 
1,733 
Is the space of all absolutely continuous functions complete?
I've never learned about absolutely continuous...

Aug2910 03:03 PM
Landau

7 
2,259 
I just jumped into a finite element methods course, and we are finding minimization problems and variational problems...

Aug2910 02:36 PM
Somefantastik

0 
829 
Hi,
I've been skimming through Knopp's book "Theory and Applications of Inifnite Series", mostly to get some...

Aug2910 12:51 PM
Petr Mugver

4 
790 
For a tangent plane to a surface, why is the normal vector for this plane equal to the gradient vector? Or is it not?

Aug2910 09:55 AM
StalkerM

2 
768 
OK, this is really confusing me. Mostly because i suck at spatial stuff.
If the gradient vector at a given point...

Aug2910 02:42 AM
richardlhp

3 
8,085 
hi, i just started freshman year, and i am taking the standard intro physics classes for physics majors', but i am...

Aug2810 11:15 AM
sponsoredwalk

3 
1,499 
The Airy function is defined as follows:
\textrm{Ai}(x) = \frac{1}{\pi}\int\limits_0^{\infty}...

Aug2710 02:39 PM
jostpuur

4 
3,267 
I have some nasty Integrals involving a couple of Hankel Functions. I've been trying for some time to do them but I...

Aug2710 04:47 AM
betel

0 
1,037 
First I need to post some pages of a book that I'm reading...
http://img824.imageshack.us/img824/5153/42785753.png...

Aug2510 01:48 PM
HallsofIvy

4 
1,051 