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

Feb2313 09:24 AM
micromass

1 
46,556 
Hey folks,
I've been stuck on this for two days now so I'm hoping for some hints from anyone...
I'm trying to...

Aug2308 09:11 AM
mhill

1 
2,404 
I'd like to map the open unit circle to the open ellipse x/A^2 + y/B^2 = 1. How would I go about doing this? I...

Jun3008 02:57 AM
urisan

1 
12,453 
in the .pdf article http://repository.dl.itc.utokyo.ac.jp/dspace/bitstream/2261/6027/1/jfs080104.pdf
i have ...

Jun408 02:10 PM
CompuChip

1 
2,598 
i need a full explanation on finite element method or better still a material i can read to help me understand better

Jun908 03:17 PM
maze

1 
2,761 
Hi, I'm currently trying to decipher an equation in a paper I'm reading for research of my own. However, I am running...

Jun1108 04:33 PM
Mute

1 
1,569 
Lagarias’ equivalence to the Riemann hypothesis should be discussed, i.e., if
hn := nth harmonic number := 1/1 + 1/2...

Jun1108 05:31 AM
mhill

1 
2,924 
should every whole number that curve x crosses be taken into consideration when
constructing a polar graph? For...

Jun1208 08:13 AM
HallsofIvy

1 
1,503 
Evaluate the limit and indicate appropriate limit laws.
lim square root of u^4+3u+6
u>2
Evaluate the limit
...

Jun1708 03:00 PM
arildno

1 
1,467 
\int \, dt
The above are all vectors. How would one go about integrating this, the answer is apparently
a...

Jun2108 06:50 AM
tinytim

1 
1,306 
Discussion: This is a proposed solution to problem 213 in Apostol's "Mathematical Analysis". The method came to me...

Jun2308 10:58 PM
uman

1 
836 
Change the Cartesian integral to the equivalent polar integral and evaluate:
Integral of (x dx dy), limits of...

Jun2508 11:40 PM
nicksauce

1 
8,151 
Hi folks,
I have a function f(t), and I want to find 2nd order polynomials that lower/upper bound f(t) in a fixed...

Jun3008 04:34 AM
aantam

1 
3,094 
I'm trying to find the regular parallelepiped with sides parallel to the coordinate axis inscribed in the ellipsoid...

Jul208 09:38 AM
HallsofIvy

1 
1,259 
We have y=f(x), and get the inverse by uing the first function and solving it for x and get x=g(y). (F and g are...

Jul408 03:19 PM
HallsofIvy

1 
1,057 
hi guys just a quick proof i need help with please:
if a = pi / (2b)
prove the integral from 0 to pi/2 of d(b)...

Jul908 03:52 AM
CompuChip

1 
1,080 
Is it possible to write the triangle inequality in 2 ways:
1. d(x,z) <= d(x,y) + d(y,z)
2. d(x,y) <= d(x,z)...

Jul908 09:53 AM
HallsofIvy

1 
1,200 
How do I show that A={r in Q: r^3<2} is a Dedekind cut.
Here is the definition I am working with.
A subset A...

Jul1308 02:59 PM
HallsofIvy

1 
1,508 
When a problem with a number of equations is given, asking to find its volume, a student has a choice between the...

Jul1508 12:12 AM
Defennder

1 
2,482 
Hello!
I have the following formula 
a*k1 + b*k2 + c*k3 = P
This is a formula i'm trying to build. It will be used...

Jul1608 01:35 AM
atqamar

1 
951 
I have an EPW that I don't quite know how to get started.
Below is the EPW question and then after that is what I am...

Jul2208 12:33 AM
Evales

1 
976 
I'm not sure whether to post this in the Mathematics or Physics forums, but I figure this problem is easily reduced to...

Jul2508 01:53 PM
roam

1 
1,290 
I get the impression that unlike solving derivatives and integrals, sequences and series do not have a lot of...should...

Jul2608 10:48 AM
quasar987

1 
2,107 
Hey ppl....
Is x/x differentiable at x = 0
Now i know that it is not defined at x=0 but the function does...

Jul2808 07:00 AM
HallsofIvy

1 
1,175 
Is it mathematically possible for a series to be first declared "possibly not divergent" via the Test For Divergence,...

Jul2808 01:54 PM
sour_kremlin

1 
1,345 
See http://camoo.freeshell.org/cohomquest.pdf
thanks
Laura

Jul2908 02:39 PM
lark

1 
1,117 
Just a really quick sanity check. This equation...
\nablasU = \nablaU  n*(n \bullet \nablaU)
...the correct...

Aug108 06:19 PM
Hootenanny

1 
2,442 
im just curious. it has been bugging me about the beginning of the movie where the professor asks Ben a question and...

Aug808 12:50 AM
nicksauce

1 
2,024 
Just got some strange equation from relativistic travel problem :
{\it PA} \left( t \right) =\lim _{{\it...

Aug908 01:00 PM
rhz_prog

1 
1,389 
I am going to provide my answer to a complex integral and i was just seeking a few pointers as to weather i was on the...

Aug1008 05:12 PM
Count Iblis

1 
1,112 
My question is :
when z=f(x,y) is written down ...
it's assume that we're working in the cartesian plane with...

Aug1408 12:34 AM
Defennder

1 
1,157 
Hi.
In this solution(page 2) to Jackson 1.5 it is stated that
\nabla^2...

Aug1408 09:29 AM
Anthony

1 
1,265 
On my post titled double integrals you explained why limits go from x^2 to x when integrating wrt y (i.e. the "bottom"...

Aug1408 01:40 PM
NoMoreExams

1 
1,036 
I need help with the following integrals

Aug1808 07:52 AM
statdad

1 
993 
iv egot 1/2ln(1z)/(z+3)=Lnv+c
does this go to ln (1z)/(z+3)1/2=Lnv+c
which goes to...

Aug1908 11:34 AM
nicksauce

1 
1,018 
Hi everyone.
I'm a brazilian mathmatician that didn't studied complex analysis. I study finance and now I'm needing...

Aug2108 02:29 PM
Feanor

1 
2,127 
given z is complex, sketch the following locus on the Argand diagram:
{(z3+j)/(zj) }= square roots of 5
{ }=...

Aug2108 06:47 AM
HallsofIvy

1 
1,048 
cos pi= 1
using the 360 circle ir those quadrants
i forgot what it was, link

Aug2308 05:23 AM
HallsofIvy

1 
8,924 
I try to find the solution of the integrals below for more than a week.
\int_{p>0}^{\infty}\frac{\exp}{p}dp
can...

Aug2308 09:05 AM
CompuChip

1 
968 
http://en.wikipedia.org/wiki/Vector_potential
The Wikipedia article is mentioning an interesting formula for...

Aug2408 06:25 AM
jostpuur

1 
1,886 
f(x)=x/x^2+1
f'(x)= 1x^2/(x^2+1)^2
But then I can't seem to work through taking the 2nd derivative, perhaps I am...

Aug2508 09:33 AM
CompuChip

1 
1,235 