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

Feb2313 09:24 AM
micromass

1 
46,261 
I tried to find the length of a sine curve using calculus.I got stuck in the integral of integral(sqrt(cos(x)^2+1), x,...

Apr1612 07:20 AM
1994Bhaskar

4 
2,216 
So kind of like this thread, I'm looking to convert a discrete sum to an integral. My idea thus far has been to arrive...

Apr1512 04:21 PM
mathman

10 
2,646 
Hi, I was wondering about how to determine the residue of a pole that is written in the form:
f(z) = \frac{1}{(1 +...

Apr1512 06:21 AM
jackmell

3 
952 
I'm confused regarding the limits required for the following question:
Find the area in the plane between the...

Apr1512 05:01 AM
DonAntonio

3 
1,133 
Could somone tell me how is it that the double integral could be used for both calculating the area as well as the...

Apr1412 07:26 PM
HallsofIvy

2 
850 
Does anyone have any tips for solving the system of equations formed while trying to find Lagrange Multipliers? I have...

Apr1412 01:39 PM
HallsofIvy

1 
1,161 
The first fundamental theorem of calculus begins by defining a function like this:
http://i.imgur.com/aWXql.png
...

Apr1412 09:38 AM
sachav

7 
1,695 
Hi,
I need help with this problem;
minimize x^3, subject to K= xΩπ
so would the solution be
KΩπ=x

Apr1412 07:58 AM
HallsofIvy

1 
1,002 
I am looking for an explanation and derivation of a total differential of a 2nd order function, i.e. a function that...

Apr1312 02:24 PM
birulami

0 
741 
Say we want to find ∫(cosx)sinx dx
set u = cosx
so du/dx = sinx
∫u \frac{du}{dx}dx
And then the dx's...

Apr1312 01:16 PM
micromass

31 
3,430 
I came accross the question
The following equation represents two straight lines. Determine the equation of each of...

Apr1312 08:39 AM
HallsofIvy

1 
1,144 
The first order KKT condition for constrained optimization requires that the gradient for the Lagrangian is equal to...

Apr1212 02:56 PM
brydustin

4 
1,003 
I am reading a recent (2003) paper, "Fatou and Julia Sets of Quadratic Polynomials" by Jerelyn T. Watanabe. A...

Apr1212 01:27 PM
Unit

4 
1,137 
How do I find the local minimum of z=sqrt(x^2+y^2)
I know its simple, but I'm stuck on it. I've tried using the...

Apr1112 07:12 AM
AlephZero

3 
1,111 
\int^{\infty}_{1}\frac{1}{e^{t}1}dt
= ln(e  1) + 1
Not sure how to get the +1 part from infinity, seems like...

Apr1012 08:49 PM
scurty

3 
1,107 
Please see the attachment. Under the given range of parameters the integral converges, but I can't find a closed form...

Apr1012 07:31 PM
semigroups

2 
1,051 
Hi,
I have a probability density function defined by
1 / D x E . eABC/2
D is a single number
E is a...

Apr1012 05:47 PM
mathman

1 
776 
Hi folks,
I need to evaluate (numerically) a multidimensional integral of the form
\int_A f(x) dx.
Now in my...

Apr1012 08:51 AM
Derivator

12 
2,640 
greetings . any ideas on how to evaluate this integral
\lim_{T\rightarrow...

Apr912 02:29 AM
JJacquelin

4 
1,250 
Hi,
I am wondering how to express the domain of a twovariable function f(x,y) as below.
For any given y, f(x,y)...

Apr812 09:22 PM
loveinla

2 
1,015 
Alright. I completely confused about determining the area between regions of polar curves. However, I do feel that I...

Apr812 08:34 PM
chiro

3 
2,050 
Is there a general inversion formula or procedure for an integral of the form (where f is the function being...

Apr812 07:10 PM
KarmonEuloid

0 
1,535 
Can someone determine what this iteration works out to, where x' becomes x again each time, starting with x=1 and a...

Apr812 01:35 PM
HallsofIvy

8 
1,027 
I need a quick reminder that this is (hopefully) true:
Let \sum a_n be an infinite series of complex terms which...

Apr812 01:26 PM
Poopsilon

2 
1,147 
Hello!
I tried to develop equations of motion of system of wheels, where the first one with radius of r is rotated...

Apr812 08:31 AM
dodo

1 
682 
When constructing the vector equation for the position vector r (finishing at point P) in the drawing below. Why is it...

Apr712 11:38 PM
Stephen Tashi

6 
1,312 
ok let transmission = t(x)=I(0)exp(a(x)) =I(0)
then let s(x)=t(xomcos(wt))
taking the fourier transform...

Apr712 06:58 PM
zak8000

0 
850 
Some time ago I saw a thread in which was mentioned a rootfinding algorithm that converges twice as fast as the...

Apr712 06:25 PM
Office_Shredder

3 
1,253 
Forgive the basic question but my Google Fu isn't strong enough in math.
I understand that for constant velocity...

Apr712 04:24 PM
dag45hol

7 
1,021 
I have been reading some material about the relationship between Kepler's Equation for Elliptical Motion and Bessel...

Apr712 01:39 PM
DuncanM

0 
1,144 
Hi there. I need to find some iteration functions for x  2\frac{sin(x)}{cos(x)}=0, as g(x)=2\frac{sin(x)}{cos(x)}...

Apr712 08:04 AM
mfb

1 
1,172 
Hi I am having trouble getting my head around the definition of a gradient. I know a gradient tells us the direction...

Apr712 07:40 AM
HallsofIvy

22 
2,683 
I am trying to differentiate the functions xn, eax and ln(ax) from first principles. I have successful in all three,...

Apr612 01:13 PM
Office_Shredder

10 
2,504 
I'm confused about the DFT of the data, fn = cos(3\pin/N) for n=0,1,...,N. It is definitely an even function, and I...

Apr512 10:30 PM
rmp251

8 
2,263 
I had questions on 2 Problems in the Text:
1. The total cost C of producing x units of some item is a function of...

Apr512 08:49 PM
ghostskwid

7 
1,800 
I am doing my research in probability. I have found some probability distribution of a random variable X on the n...

Apr512 08:13 PM
chiro

7 
1,120 
I'm programming a camera for a game, and to achieve some effect I think the best solution would be some kind of...

Apr512 08:05 PM
Xcrypt

13 
1,586 
Hello all!
I have been reviewing my vector calculus coursework as of late, and this time around, I've been really...

Apr512 01:43 PM
arildno

4 
4,309 
I am trying to derive the divergence in cylindrical coordinates using the Jacobian. I have already found the Jacobian...

Apr412 09:39 PM
thealyosha

0 
1,899 
How you get Fourier transform from Fourier series? Do Fourier series becomes Fourier transform as L > infinity?
...

Apr412 10:52 AM
Ahmed Abdullah

1 
1,476 