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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 46,226
It seems that the only applicable use I've seen is in finding intercepts on various axes. Are there any other...
Jun2-14 05:13 PM
5 353
Can anybody help in in finding the Fourier transform of f(x) = xe^-x where -1<x<0 and f(x)= 0 otherwise?
Jun1-14 09:10 PM
5 361
I've made mistakes where scaling was used but I just assumed that I didn't need it. e.g. a bug walking towards <1,1,1>...
Jun1-14 07:29 PM
10 321
I learned in my calc 1 class that to calculate the arc length of a curve, we are to compute the integral of the...
Jun1-14 04:13 PM
8 474
I am quite confused between displacement and distance . Suppose a particle travels along a semi circular path or...
Jun1-14 12:49 PM
1 304
If the critical points corresponding to the global min/max of a function ##f:\mathbb{R}^2\rightarrow\mathbb{R}## lie...
May31-14 08:06 AM
1 452
If the tangent is horizontal, it is where the tangent is zero. In single var. calc. that would be at max. or min. for...
May31-14 06:03 AM
3 304
∫sin(x^3) dx I have absolutely no clue on what to deal with the x^3 part. All I can think of is this: ∫sin(ax) dx...
May30-14 11:39 PM
9 561
I know its easier to use the substitution method, by I'm trying to see how it'll work for integration by parts. I...
May30-14 11:25 PM
3 358
\int_{0}^{a}\frac{x}{(x^2+z^2)^\frac{3}{2}}dx Hi all, I'm stuck on this one. Sure theres an easier way to do it....
May30-14 07:21 PM
6 312 NOTE: this is not homework problems. I am trying to...
May29-14 04:55 PM
1 391
I would like to know whether there exists a solution to the following integral, \frac{1}{\pi}...
May29-14 03:17 PM
1 312
So I am pretty bad at u substitution. I don't really get how to replace values with du or u. Can you please give...
May29-14 06:51 AM
7 514
Please, hurry. It's driving me nuts
May28-14 11:02 PM
Nick O
2 394
in this video , the prof had to integrate x/(a^2+x^2)^3/2 , i know we usually do this using substitution , but in the...
May28-14 06:07 AM
9 394
So I was reviewing my random process notes. In it there is an integral that they have that I can't seem to get the...
May27-14 01:33 PM
2 397
This is not a homework question but something that has come up during work and I just need some guidance on what is...
May27-14 09:42 AM
0 317
Hi guys, I am confused from what I know the max. value of directional derivative at a point is the length of the...
May27-14 07:22 AM
2 366
Hi, The two terms should vanish at infinity according to the Quantum textbook of...
May26-14 01:58 PM
7 489
I have a function: f(x) = Asin2(x) + Bcos2(x) + Csin(2x) and I want to find the minimum turning point(s). To...
May26-14 03:17 AM
4 394
A point has no dimension and a line, which has dimension, is made from points together. How does something without...
May25-14 06:28 AM
Simon Bridge
3 303
Hi, I'm stumbled on the following integral, \int d\vec{q} e^{i\vec{q}\vec{r}} \cos(2\theta), where \theta...
May24-14 11:49 PM
5 525
If the discrete summation is symbolized by ##\sum## and the continous by ##\int##, so, by analogoy, the discrete...
May23-14 09:24 PM
Simon Bridge
1 401
I've come across a question which as really stumped me because I thought I knew how to do this but apparently not. ...
May23-14 09:11 PM
Simon Bridge
1 347
Hi Ive got some calculations to do on amount of charge on a capacitor with respect to t. Formula for amount of...
May23-14 03:03 PM
3 356
Hi, My text book is giving me 3 rules that must be met to be continuous: I don't understand what my text book is...
May22-14 12:09 PM
4 425
hey pf! suppose i have a function ##f( x , y)##. i make a change of variables such that ##z(x,y)## in such a way...
May21-14 05:36 PM
3 442
I would like to know how do we solve d2x/dt2 = k' where k' is a constant i.e the task is to find x as a function of...
May20-14 04:45 PM
4 568
I'm quite interested in the history behind vector analysis especially Curl and Divergence and gradient operators etc....
May20-14 03:58 PM
6 586
I have a polar arc length problem that comes down to integrating √(sinθ + 1). Through double u-sub and trig sub I got...
May19-14 11:07 PM
3 516
I usually see that Laplace transform is used a lot in circuit analysis. I am wondering why can we know for sure that...
May19-14 12:28 PM
8 451
Is this possible.. Say, a∫b f(x)dx = G(x)|x=b - G(x)|x=a = S, where S, a and b are known. Can we find G(x) ?
May19-14 12:13 PM
3 736
Am trying to get a solution to the definite integral below. Looking for some direction. I = 0∫1 xf(x)dx where ...
May19-14 06:48 AM
9 773
When you have a fraction, how do you know when to use iteration by parts, or use substituion, pick a u, solve for a...
May19-14 02:04 AM
5 478
Given V=xf(u) and u = \frac{y}{x} How do you show that: x^2 \frac{\partial^2V}{\partial x^2} +...
May18-14 03:17 PM
6 431
I've seen it written two different ways: $$\frac{\partial f}{\partial x} = \lim\limits_{h \rightarrow 0} \frac{f(x...
May18-14 01:15 AM
Simon Bridge
1 327
Hi, this is not a homework and my problem is much bigger for me to give full details here. I came across this...
May17-14 04:42 AM
4 394
I guess I have several definitions of df flying at me, and I am having trouble getting a continuous definition. So in...
May16-14 07:55 PM
3 664
For example the surface (x,y,x+y), can for example surfaces be considered as one abstract 'vector' in some abstract...
May15-14 01:55 PM
2 335
Hi there! How can I prove that the space of matrices (2x2) nonzero determinant is dense in the space of matrices...
May14-14 09:46 AM
7 442

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