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- Elementary functions. Calculating limits, derivatives and integrals. Optimization problems
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Jan16-12 Greg Bernhardt
Please post any and all homework or other textbook-style problems in one of the Homework & Coursework Questions...
Feb23-13 09:24 AM
1 46,270
I understand that if you have a system that is linear and time invariant, that you can perform a Fourier transform on...
Nov21-12 07:34 PM
10 2,941
Hello, This limit \lim_{x \to 0} \frac{ \sin x}{x} is often cited as being an example where L'Hopital's rule...
Dec9-12 10:56 AM
8 1,684
Hi Guys~ I was wondering if anyone had any suggestions for applications of the Kelvin-Stokes Theorem. Recall that...
Nov21-12 10:18 PM
1 1,085
How we get relation \lim_{t\to 0}f(t)=\lim_{p\to \infty}pF(p)? Where ##\mathcal{L}\{f\}=F##.
Nov23-12 02:05 AM
4 1,067
I don't have a ton of experience in numerical methods, so I'm hoping someone can help me out. Suppose I have a...
Nov25-12 08:21 PM
Stephen Tashi
6 1,199
\Gamma(n) = int(0 to infinity)dx Show that it can also be written as: \Gamma(n) = 2int(0 to infinity)dx I...
Nov21-12 05:18 PM
2 786
Suppose I have a function of x and t such that f(x,t) \leq x^{1/2} \sqrt{1+t^2}. How should I express this...
Nov22-12 04:41 PM
1 769
Hi, I have a question concerning solid of revolution. The bowl-shaped volume formed by rotating the area...
Nov24-12 08:05 AM
4 684
Hi I often see the following in books but I do not understand how they are equal. So can someone please tell me for...
Nov23-12 01:00 PM
7 1,449
Could someone please explain how the formula at the bottom of the page is derived i.e. how is the Taylor theorem used...
Nov24-12 07:48 AM
9 1,364
My textbook states J_v(x) J'_{-v}(x) - J'_v(x) J_{-v}(x) = -\frac{2 \sin v \pi}{\pi x} My textbook derives...
Dec3-12 08:47 PM
4 2,365
It's not hard to show that the function: g = \frac{1}{2} (c \times r) is a "vector potential" function for the...
Nov24-12 01:12 PM
3 909
Are these assertions true? I am referring to polynomials with real coefficients. 1. There exists of polynomial of...
Nov25-12 09:34 AM
6 1,319 What are the mathematical steps and assumptions to reach the conclusion that length(ab) ≈ dx...
Nov24-12 10:43 PM
1 753
Reading through Spivak's Calculus on Manifolds and some basic books in Analysis I notice that the divergence theorem...
Nov28-12 09:54 PM
5 1,271
Hello: I have been trying to solve the following equation on MathCad or Excel, however its been quite a struggle :(...
Nov26-12 06:53 AM
7 949
So I've been practicing several series that can be solved using the alternating series test, but I've came to a...
Nov30-12 07:19 AM
4 1,150
In many of my physics classes we have been using Taylor Expansions, and sometimes I get a bit confused. For example,...
Nov28-12 10:44 PM
3 878
After doing my homework on testing for convergence/divergence in infinite series, I noticed that if you are testing...
Dec1-12 10:22 AM
4 858
Is there any way to solve Fredholm integral equation without using Fourier transform....
Nov30-12 03:40 PM
1 688
Hi y'all. Here is exactly what is stated on the theory page of my book: Example: Area of a Region The area of a...
Dec3-12 09:01 PM
2 841
I'm having a conceptual problem with integrating a function and thought someone might enlighten me. Say you have a...
Dec2-12 03:23 AM
5 888
hello, Please see attached excerpt of a solution to a problem. I do not understand why the result obtained is to...
Dec3-12 01:18 PM
4 829
I've been working my way through Intro to Electrodynamics (Griffiths), and in Chapter 3, one of the derivations comes...
Dec2-12 06:18 PM
4 879
i facing a maths problem in integrating ∫ cos^2(∏/2cosθ) with limit from 0 to ∏/2,i was panic and struggled a long...
Dec3-12 04:32 PM
8 1,204
Hello there, I have the function $$f(t) = \int_0 ^{t} \frac{1}{\sqrt{t-\tau}} \mathrm{d}\tau$$ The integral...
Dec4-12 01:53 PM
3 852
As the title obviously states, how can I evaluate this integral by hand ? I know the result of it, I need to learn how...
Dec6-12 02:13 PM
8 1,106
If i have a point at (0,0,5) in x,y,z system, then i make 2 rotation on the point with center at origin. i)the first...
Dec7-12 01:37 AM
6 1,364
Is it possible to do integrals like this with eulers formula \int e^{-x^2}cos(-x^2) and this integral is over...
Dec5-12 07:42 AM
1 477
guys, we know ∇q=qi,j and ∇ ∇.q=qi,ij but what will happen if we have qi,jqm,mj ? (sum on j) I know...
Dec5-12 03:18 PM
0 737
hi, Reading a book on thermodynamics and the guy often uses something like this : ∫1/T dQ = ΔS and then he...
Dec7-12 05:37 PM
7 870
When I attempt to use the method of integration by parts on the below integral, I don't get anywhere since I only...
Dec6-12 07:10 PM
6 861
Today we learnt tabular integration as a shortcut method for integration by parts. Is there a proof that legitimizes...
Dec6-12 06:04 PM
1 1,192
I have a question to ask, is dx = δx, can they cancel each other like \frac{dx}{δx}=1 and is it mean that: ...
Dec7-12 04:29 PM
5 1,230
I was trying to do 2d Fourier transform of 1/k^2 in 2d. I know that answer is log r. I am not able to derive it. ...
Dec6-12 11:22 PM
0 737
I have got this integration: \int_{-1}^{1}\frac{x^n}{(1+w^2-P^2-2wx+p^2x^2)^2}dx And at the same time, I can provide...
Dec7-12 01:28 AM
Wu Xiaobin
0 529
Recently I have been working on classical Gaussian electrical field and I come through this joint moments...
Dec7-12 01:58 AM
Wu Xiaobin
0 770
I need to take the integral of the following function over one cycle. y(t) = sin(wt)cos(wt-p) p is a phase...
Dec7-12 03:11 PM
1 650
Why Poisson kernel is significant in mathematics? Poisson kernel is ##P_r(\theta)=\frac{1-r^2}{1-2rcos\theta+r^2}##....
Dec7-12 12:44 PM
2 619
I've been wanting to learn physics for a while, and bought an intro book and read through it. Now I want to move onto...
Dec8-12 03:39 PM
2 753

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