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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 46,523
Hello. Let us say that we have a graph f(x)=2x when x does not equal 3, and f(x)=undefined when x=3 The limit of...
T 04:33 PM
9 139
I would like to ask for help solving this problem. I've been at this problem for a few hours without making any...
T 02:34 PM
2 103
So, a while back i read about this idea, but i cant find it anymore, so i was wondering if anybody else knows about...
T 11:14 AM
4 357
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...
T 04:09 AM
9 495
Today was our first lesson in our high school's accelerated calculus class. The class is our school's most second...
Y 11:48 AM
5 339
So my question is regarding the gradient of a function. Suppose we have a function expressed In cylindrical...
Sep12-14 04:43 PM
3 242
What is taylor formula and how it is used in calculators?
Sep12-14 06:12 AM
4 326
Hello! I'm having some trouble determining, when trying to find the area between two curves, when to integrate with...
Sep9-14 10:32 PM
1 185
What wrong with my calculation.the problem is from the attachment. It keeps saying: NMinimize::nnum: "The function...
Sep9-14 04:52 PM
3 142
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....
Sep9-14 12:28 AM
10 489
Hello, To measure the atomic force with an AFM. One can use the frequency shift of a cantilever. This change of...
Sep8-14 09:14 PM
2 184
Several questions I have been thinking about... let me know if you have thoughts on any of them I added numbers to for...
Sep7-14 12:24 PM
2 303
Hello everybody, I'm currently reading the book Special Relativity in General Frames by Gourgoulhon. There,...
Sep6-14 05:02 AM
Incnis Mrsi
10 346
I'm interested to find out how many people would agree on several quick solutions: 10X = 4X 1) X = 0 2) 10 =...
Sep5-14 09:57 AM
2 199
For this function y=\sqrt{2ln(x)+1} if I use the chain rule properly, should I be getting this answer? ...
Sep5-14 01:07 AM
10 496
I have a small confusion about functions and variables. So, on doing a bit of reading, a linear transformation is a...
Sep4-14 11:19 AM
9 360
Hi, Is the following integral well defined? If it is, then what does it evaluate to? \int_{-1}^{1} \delta(x)...
Sep4-14 08:32 AM
Incnis Mrsi
11 483
Hi, I am struggling for some time to solve the following integral: $$ \int_{-n}^{N-n} \left(...
Sep4-14 08:12 AM
Incnis Mrsi
2 472
Hi! I am taking a second look on fourier transforms. While I am specifically asking about the shape of the fourier...
Sep4-14 07:50 AM
Incnis Mrsi
3 321
Hi. Is using the Levi-Civita symbol to calculate cross-product combos like A x (B x C) allot faster than just using...
Sep4-14 04:55 AM
Incnis Mrsi
3 393
I asked to differentiate the given function using exponential function with sin(√3t + 1) I turned it into Im ...
Sep4-14 01:42 AM
2 298
when differentiating e^(at) * (cos(bt) + isin(bt)) are you able to use product rule to find the derivative...
Sep2-14 07:03 AM
2 260
How do I perform this integration: \int \left (\frac{dy}{dx}\right)^{2} dx Thanks!
Sep1-14 04:58 PM
12 1,166
Let a,b are constants. a=\int_{-∏}^∏ f(x)\,dx and b=\int_{-∏}^∏ {g(x)f(x)}\,dx, Then by integration...
Aug31-14 03:55 PM
5 391
Given: cos(x)\frac{1}{x} Find \frac{dy}{dx}: Now I know... \frac{dy}{dx} of cos(x) = -sin(x) and...
Aug31-14 12:18 PM
10 291
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
1 264
I was playing around with some simple differential equations earlier and I discovered something cool (at least for...
Aug30-14 07:20 PM
4 472
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
6 401
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
9 370
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
3 363
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
8 397
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
4 342
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
10 640
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
7 454
I'm doing an undergraduate course in engineering 1st sem. I have physics which contains cumbersome amount of vector...
Aug23-14 06:59 AM
2 374
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 1,820
many books only tell the operation of total derivative and partial derivative, so i now confuse the application of...
Aug21-14 08:11 AM
3 522
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 2,593
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
2 365
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
2 363

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