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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 46,268
How do I perform this integration: \int \left (\frac{dy}{dx}\right)^{2} dx Thanks!
T 04:58 PM
12 964
For this function y=\sqrt{2ln(x)+1} if I use the chain rule properly, should I be getting this answer? ...
T 12:52 PM
6 246
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So, a while back i read about this idea, but i cant find it anymore, so i was wondering if anybody else knows about...
Y 11:47 PM
Simon Bridge
1 140
Let a,b are constants. a=\int_{-∏}^∏ f(x)\,dx and b=\int_{-∏}^∏ {g(x)f(x)}\,dx, Then by integration...
Y 03:55 PM
5 232
Given: cos(x)\frac{1}{x} Find \frac{dy}{dx}: Now I know... \frac{dy}{dx} of cos(x) = -sin(x) and...
Y 12:18 PM
10 143
Hey. I'm new to the forum and I was hoping you could help me solve this integral. I was searching for a clue on...
Y 09:28 AM
7 315
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You know that the problem of calculus of variations is finding a y(x) for which \int_a^b L(x,y,y') dx is stationary....
Y 02:45 AM
9 271
Hi members, see attached Pdf file. For a<0,write b=-a and let x=bt.Then My question: how becomes the...
Aug30-14 07:41 PM
1 122
I was playing around with some simple differential equations earlier and I discovered something cool (at least for...
Aug30-14 07:20 PM
4 306
So, as i understand, the geometrical meaning of this type of integral should still be the area under the curve,...
Aug30-14 03:39 PM
6 243
My textbook says the extreme value theorem is true for constants but I don't buy it. I mean I suppose that every...
Aug29-14 12:22 AM
9 226
Hi! I am taking a second look on fourier transforms. While I am specifically asking about the shape of the fourier...
Aug28-14 03:27 PM
2 145
Hi, I am struggling for some time to solve the following integral: $$ \int_{-n}^{N-n} \left(...
Aug27-14 09:14 AM
Greg Bernhardt
1 314
Can someone explain to me why in this equation (attached) where ρ(t)=\sumδ(t-ti) , dirac funtion. in the left...
Aug26-14 10:03 PM
3 226
First off: I think I understand the chain rule and how it derives from \lim_{h \to 0} \frac{ f(x+h)-f(x)}{h} ...
Aug26-14 07:55 PM
8 246
Hi The question is the following: is it possible for a (say) real function to be continuous at a certain point...
Aug26-14 08:42 AM
4 202
Hi :) I'm doing my A-Levels and have a maths investigation project for which I decided to model the working of a...
Aug25-14 07:58 PM
Simon Bridge
10 500
Hi, Is the following integral well defined? If it is, then what does it evaluate to? \int_{-1}^{1} \delta(x)...
Aug25-14 03:55 AM
10 316
I am looking at a solution to an question and I don't understand how the value of the following definite integral...
Aug24-14 05:29 PM
7 306
Hi. Is using the Levi-Civita symbol to calculate cross-product combos like A x (B x C) allot faster than just using...
Aug24-14 10:50 AM
2 211
I'm doing an undergraduate course in engineering 1st sem. I have physics which contains cumbersome amount of vector...
Aug23-14 06:59 AM
2 236
Firstly, the set E is defined: "Let E be the set of all positive real numbers t such that tn<x." Later on the...
Aug22-14 12:51 PM
3 1,683
many books only tell the operation of total derivative and partial derivative, so i now confuse the application of...
Aug21-14 08:11 AM
3 384
Differentiation by first principles is as followed: $$y'=\lim_{h\rightarrow 0}\dfrac {f\left( x+h\right) -f\left(...
Aug20-14 10:23 PM
15 2,431
Apparently, f \nabla^2 f = \nabla \cdot f \nabla f - \nabla f \cdot \nabla f where f is a scalar function. ...
Aug20-14 12:12 PM
2 242
Let a\in\mathbb{R}, a>0 be fixed. We define a mapping \mathbb{Q}\to\mathbb{R},\quad q\mapsto a^q by setting...
Aug19-14 06:20 PM
2 236
Hey guys, Not claiming to be an expert on numerical methods here but I am doing some digital integration using...
Aug19-14 01:46 PM
1 225
I'm an undergrad who has just completed the standard calculus sequence (1, 2, and multivariable). I've done well in...
Aug18-14 02:04 PM
3 353
You can prove if f(x) is an odd function and f(x+ t) is an even function then f(x) is periodic with period at most 4t....
Aug17-14 02:10 AM
2 280
I think this is a theorem, and I'm telling myself that I've proved it. Just a shout out for any possible...
Aug16-14 11:39 PM
3 289
1. What if absolute convergence test gives the result of 'inconclusive' for a given power series? We need to...
Aug16-14 03:26 PM
5 411
Simply put, can you find the function which extremizes the integral J=\iint L\left(x,y,f(x),f(y),f'(x),f'(y)\right)...
Aug16-14 03:36 AM
4 464
Can you suggest a general analytical solution to the following equation \ln(x^{3/2})-bx-c=0 where x is real...
Aug15-14 02:54 PM
6 359
Hello everyone, I brushing up on integration techniques and I came across this problem in a book. Does anyone here...
Aug15-14 01:43 PM
2 454
Could someone walk me through how to maximize this 2-variable function wrt z? ...
Aug15-14 01:20 PM
3 392
Hi, Let y= |sin(x) + cos(x) + tan(x) + sec(x) + csc(x) + cot(x)| Find the minimum value of "y" for all real...
Aug15-14 10:09 AM
27 874
Our integral \int\limits_0^{\pi/2} \sin^{2a+1}(x)\,dx Has a Factorial Form: {(2^a a!)}^2 \over (2a+1)! What...
Aug13-14 07:46 PM
3 297

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