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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 45,397
Supose a_n=f(n) What is the relationship between convergence or divergence of: \sum_{n=1}^\infty a_n and ...
Jun7-10 11:51 AM
7 2,358
An example of implicit differentation in Stewart, 6th ed, p 883, is given as follows: x^3 + y^3 + z^3 + 6xyz = 1 ...
Jun7-10 01:24 AM
1 2,856
If x_n\geq 0, y_n\geq 0 and \lim \limits_{n \to \infty }x_n exists, we have \limsup\limits_{n\to\infty}(x_n\cdot...
Jun7-10 12:12 AM
3 1,287
I'm studying the non-linearity effect of power amplifier on multicarrier signal. While modeling the behavior of power...
Jun6-10 11:26 PM
2 772
I have a little question that's bothering me : Suppose you have a metric space X with a dense subset A. Can we say...
Jun6-10 03:26 PM
5 1,359
Dear all, Someone could help me to understand how is mathermatically expressed the amplitude of the velocity...
Jun6-10 02:52 PM
8 1,738
Hi everyone, I have a graph here (not a homework related, just something i encountered in daily life) but it's in...
Jun6-10 11:08 AM
8 1,296
hello maths experts is the following true? graphically, this is...
Jun6-10 10:00 AM
6 22,841
I know how to calculate the divergence and curl of a vector field. What I am lacking is any intuition on what these...
Jun6-10 04:04 AM
3 1,745
Hi everybody :approve: I'm having a lot of trouble remembering all of the formulas for differentiating inverse...
Jun6-10 12:31 AM
15 1,470
Who has a pdf copy of the book A Companion to Thomas Korner?
Jun5-10 05:10 PM
2 1,413
Hi all, I need to evaluate the following equation : \mathbf{n} \cdot \cdot\mathbf{n} where \mathbf{n} is...
Jun5-10 11:21 AM
0 914
given any function (or maybe distribution) f(x) and g(x) so f(x+i\epsilon ) - f(x-i\epsilon ) = g(x) if we...
Jun4-10 03:50 PM
1 827
Hey all. I'm trying to convert a series which gives me the magic constant for a magic square into an equation. How...
Jun4-10 03:49 PM
5 2,516
Hi I have a question, if I have a function that is continuous on the interval where a <= b, why would integrating...
Jun3-10 04:17 PM
5 3,129
I was wondering if there's an example of a power series \sum_n^\infty c_n (z-a)^n with radius of convergence R so that...
Jun3-10 10:29 AM
4 2,252
Hi all, I was wondering if anyone could help me with a problem i've got at the moment: I need to calculate the...
Jun3-10 08:22 AM
0 961
Hi, I asked this question in the quantum physics forum but...
Jun3-10 03:32 AM
0 717
Hi This is a long story, I make it short: I am working in a project where I need to find a matrix defined by a third...
Jun2-10 04:51 PM
1 1,755
These identities might be considered as true: \begin{array}{rcl} 1 - 1 + 1 - 1 + \cdots & = & \frac{1}{2} \\ ...
Jun2-10 01:00 PM
20 2,303
For some reason, I can not seem to evaluate this integral. \int \frac{x}{ln(x)} dx When I plug it into maple it...
Jun2-10 09:04 AM
6 8,462
The unit normal vector N of a given curve is equal to the first derivative with respect to t of the unit tangent...
Jun1-10 09:34 PM
1 2,361
Hello, How can I find the limit of x^{k}\mathrm{e}^{-ax^n} for x\to +\infty. a,k,n are positive reals. I even have...
Jun1-10 08:57 AM
Char. Limit
9 1,888
My question revolves around the following derivative: for z(x,y) *sorry I can't seem to get the latex right. ...
Jun1-10 12:50 AM
5 1,118
How do you derive the hypervolume/hypersurface of the unit ball in n dimensions? I thought it'd be trivial but oh...
May31-10 02:24 PM
4 817
I've taken maths through calc 3. I understand the Maclaurin series represents a function f(x) as a power series: ...
May31-10 10:13 AM
3 1,686
So, I was reading the book "Riemann's Zeta Function", by H.M. Edwards, and on page 10 I see an integral I don't quite...
May31-10 03:51 AM
5 1,272
Let's find the Maclaurin Series of tanhx up to powers of x^5 Yeah! Good idea! I know Right, f(x) = tanh...
May31-10 02:50 AM
4 4,312
Dear All, Its my first post on this the physics forum. i have a question. Can we integrate double integrals...
May30-10 09:38 PM
0 3,182
quick question, I was watching an MITOCW physics lecture and I want to know where a principle breaks down. \int^t_0...
May30-10 08:27 PM
11 1,458
I have a function that is parametrized by a direction and returns a signal strength, F(\theta, \phi) \rightarrow R...
May30-10 06:14 PM
0 593
Hello, if I have a function f:\mathbb{R}\rightarrow \mathbb{C}, what are the conditions on f for which the derivative...
May30-10 04:55 PM
2 1,485
So i'm trying to find out what the procedure is to convert a cartesian unit vector to a cylindrical unit vector. Any...
May30-10 12:45 PM
2 2,955
My course notes state: f(x+s) = f(x) + \nabla f(x+ts)^{T}s for some t \in (0,1) If f is twice...
May30-10 10:23 AM
0 723
I know that the Taylor Series of f(x)= \frac{1}{1+x^2} around x0 =...
May30-10 01:12 AM
11 54,589 Just wondering if anyone could help me with finding the most...
May29-10 07:20 PM
0 1,180
How do I calculate \int_C dz/1-z when C is a line segment from 1/2 to \sqrt{3i}. I know that in the complement of...
May28-10 05:55 PM
7 1,006
I need to figure this integral out for a graduate research project, however I've been stuck on it for days now: int...
May28-10 01:03 PM
4 2,247
Hi, I'm doing calc-2, and I have hard time understanding and visualizing the idea of Taylor approximation in my head....
May28-10 07:40 AM
2 805
Hi All, I have a question about notation. Suppose I have an expression: f(x,g(x,y)) I would like to know...
May27-10 09:49 PM
2 756

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