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Calculus

- Elementary functions. Calculating limits, derivatives and integrals. Optimization problems
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Please post any and all homework or other textbook-style problems in one of the Homework & Coursework Questions...
Feb23-13 09:24 AM
micromass
1 40,028
d/dx (sin-1x) = \frac{1}{\sqrt{1-x2}} But using chain rule, I got: dy/dx = -sin-2xcosx Why???
Sep17-11 10:40 AM
HallsofIvy
2 736
Hi, the AP test is approaching and I'm struggling with these two Calculus questions and need some guidance. If you can...
Apr16-08 12:06 AM
ice109
1 4,496
I have a relation xy=c2 , if i apply implicit differentiation to both sides i get dy/dx =-y/x , but if i write the...
Oct1-09 10:39 PM
quasar987
2 2,446
I was wondering if anyone knows of an example where f and g are two functions that do not have limits at the real...
Nov1-09 08:06 PM
l'H˘pital
1 1,674
looking for 2 functions f,g:X --> X that are discontinuous but their composition gof continuous...
Nov17-04 07:30 AM
matt grime
1 794
Hi guys.. i was studying calculus and i found some problems in solving these two questions.. would you please help me...
Oct22-07 09:36 PM
keltix
8 2,273
I need help on these two integration questions: 1. (x^2 -16)/(2x + 8) dx 2. 1/(1+9x^2) dx
May2-07 01:55 PM
Joza
4 1,412
Hi all, I need help. What is the difference between \int_{0}^b x^2 dx
Apr10-08 01:20 PM
sutupidmath
2 1,130
Two basic limit problems just solve the limit if it exists. I know the answers but I don't understand why the answers...
Feb6-09 11:04 PM
Iron_Brute
2 690
Aloha! This is my first post, and I hope that I am posting in the correct area... I need help with a math...
Feb21-12 01:05 PM
T.A. Zenaide
6 1,354
Find the Limits 1. lim 312 x->11+ 2. lim (x^2...
Dec4-06 07:55 AM
dontdisturbmycircles
8 1,116
so x(1) := 8, and x(n + 1) = 1/2(X(n)) + 2. show that it is bounded and monotone, and find the limit. so I claim...
Feb15-05 06:46 AM
HallsofIvy
3 1,175
1. In the navier stokes equation we have the term (\vec{u} \bullet∇)\vec{u} If I have \vec{u} = f(r)(-y,x) with r=...
Feb13-13 06:18 PM
ericm1234
0 491
This was given as a problem... \frac{2x+y}{x-3y}=4 Now, if you just solve it as is, using implicit...
Apr12-04 10:40 AM
matt grime
6 856
I have few questions about extrema of fonctions of two variables. It is written in my textbook: "At a local maximum,...
Dec18-04 01:01 PM
Hurkyl
5 1,815
1. Write out the vector V=2i+3j at the point (x,y) = (1,2) in terms of the unit vectors in plane polar coordinates. Do...
Apr21-04 01:26 PM
vadik
3 1,159
I was playing around with euler's formula the other day and found this odd proof which says 2ipi=0. I know this is...
Jan9-09 02:38 PM
adriank
6 1,561
Hi All, I'm working on coding some 2-D interpolation techniques. With wikikepdia's help, I've managed blinear...
May31-12 08:30 AM
RH10
4 944
Hey everybody, \int_{B(0,\epsilon)} log \frac{1}{r} \ dxdy \ = \ \int^{2\pi}_{0} d\theta \ \int^{\epsilon}_{0} log...
Sep20-08 08:14 AM
HallsofIvy
4 4,332
Hi, can someone suggest me some reference (possibly available on the web) where to find some details on the...
Mar5-09 10:26 AM
thefly
0 4,397
Hi. I'm new to vector physics, and I'm trying to write a function to predict the rebound vectors of two circles...
Sep5-08 02:38 PM
realgreatbass
0 3,599
I'm studying for a re-examn in a physical measuring techniques course that includes some fourier analysis. On old...
Aug18-11 01:07 PM
hadoque
0 731
Hi there, I'm new to this community, but I think I need some help. Have been trying to analytically compute the 2D...
Apr6-11 01:50 AM
sooke
0 1,380
w = 1 + sigma(xy)*log(1-w); u = sqrt((1-w)*(1+w)); v = u*sin(phi); u = u*cos(phi); u, v and w...
May21-10 06:00 PM
ireland01
0 5,429
I am looking for help with the following integral A = \int dx \int dy \exp(-a (x+y)^2 +ib(x-y)) sinc(cx+dy)...
Sep6-05 10:08 PM
beautiful1
2 9,949
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
navaneethjnc
0 653
Does anybody out there know what the Laplacian is for two dimensions?
Jul19-05 11:32 PM
MalleusScientiarum
9 8,221
My function is; y(x,s)= 1-(cos*gamma(s-1))/(1+x^2)^(s-1)/2 varible x will have range from 0 to 10. At one time...
Jan31-12 12:19 PM
aredy29
0 1,366
:confused: hi, this will be my first post on the forum, although i in the past have looked over it! um, this is...
Oct24-09 11:51 PM
mbsl5
12 7,941
so to find when a graph is concave up or down you can use the 2nd derivative rule, but what happends if we have f"(x)...
Nov3-08 06:39 PM
Megz27
4 1,681
f(x)=x/x^2+1 f'(x)= 1-x^2/(x^2+1)^2 But then I can't seem to work through taking the 2nd derivative, perhaps I am...
Aug25-08 09:33 AM
CompuChip
1 1,188
Can some on pleases explain this too me. I have an AP book, and i am to do a few problems out of it for class, and but...
Sep23-04 02:14 PM
JasonRox
9 6,516
The formula given by my instructor for a Taylor Series approximation of the second order at point (a,b) is f(a,b) +...
Nov16-10 09:19 AM
HallsofIvy
1 3,511
Hi. I came across this page on Wikipedia regarding the 2nd derivative test. It says that if the determinant of the...
Jan11-09 05:28 PM
BackEMF
5 5,399
I want to calculate what body2 must have a mass. The body2 must zero trajectory and speed. Bodies m1 and m2 are...
Apr14-11 03:41 PM
asteorit1
2 834
How can I show that 1+\frac{n}{1!}+\frac{n(n-1)}{2!}+\frac{n(n-1)(n-2)}{3!}+...= 2^{n} This comes from proving...
Aug9-07 10:36 PM
theperthvan
2 1,357
3 + 2 log (base 2) X = log (base 2) y how can this show, that y = 8X squared??? Please help! :confused:
Feb5-05 09:55 AM
arildno
4 1,137
I'd like to delete it.
Apr20-04 02:41 PM
dapet
0 2,463
For a kinematic problem I obtained the following equations: p1=- r*sin(theta_c) - d*cos(psi_a)*sin(theta_a)+c1...
Feb23-11 02:49 PM
azizz
2 749
(1) \alpha(t-t_{0})=\int_{R_{0}}^{R(\Theta)}\frac{du}{u\sqrt{a^ 2-u^2}} (2)...
Oct7-04 07:21 AM
HallsofIvy
4 1,146

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