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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 40,127
Hello all, I have been thinking of a way to prove divergence of a sequence that should work, but can't move past...
Sep20-09 02:56 AM
snipez90
1 1,045
There is a theorem in partial derivative If x= x(t) , y= y(t), z= z(t) are differentiable at t_{0}, and if w=...
Sep19-09 02:29 PM
bigwuying
2 1,442
Okay my book says that a collection H of open sets is an open covering of a set S if every point in S is contained...
Sep19-09 01:32 PM
HallsofIvy
4 3,534
Hi all, I need answers and EXPLANATION to the following problems: (Please Help!) (i) f : N --> N defined by f(x) =...
Sep19-09 02:59 AM
Hurkyl
1 623
I'm studying Integral Calculus on my own with the help of a book and videos around the net. I found this site...
Sep18-09 04:43 PM
lurflurf
5 1,141
iam reading analysis by terence tao 2 i can understand the book but cannot express the steps properly while writing...
Sep17-09 11:20 PM
╔(σ_σ)╝
6 2,460
Hi, I'm trying to use calculus of variations to solve for the probability distribution with highest entropy for a...
Sep17-09 06:29 PM
CuppoJava
0 959
The set \{1,2,3,4,5\ldots\}...is it closed as a subset of \mathbb{R}? I'm thinking "yes," but I'm unsure of myself for...
Sep17-09 06:23 PM
AxiomOfChoice
4 783
Greetings, I am a computer scientist revisiting integration after a long time. I am stuck with this simple-looking...
Sep17-09 05:57 PM
mathman
4 3,896
I'm having trouble understanding where this concept comes from: Step 1) If you start out with the following two...
Sep17-09 04:35 PM
John Creighto
5 1,709
If you have two measurable sets A and B (not necessarily disjoint), is there an easy formula for the measure of the...
Sep17-09 10:43 AM
jambaugh
5 983
http://bildr.no/thumb/489513.jpeg http://bildr.no/thumb/489514.jpeg http://bildr.no/thumb/489526.jpeg...
Sep17-09 06:28 AM
waterloo2005
1 834
Please show me how to integrate a natural log function. Both w and d are constant. This is not a homework. This is...
Sep16-09 11:34 PM
yungman
2 627
Here is the problem exactly how it is written on my paper... Consider the surfaces x^2+2y^2-z^2+3x=1 and...
Sep16-09 05:47 AM
HallsofIvy
5 1,637
If f is continuous at x = a, then is it continuous in some neighborhood of x = a as well?
Sep15-09 11:47 PM
Elucidus
2 912
Hi, I was playing around with Euler's Identity, and I found something (or at least I think I found something)...
Sep15-09 07:49 PM
Edwin
2 1,000
I'm trying to study by myself branch points, cuts, etc. Can someone suggest me a good tutorial on the web on these...
Sep15-09 02:53 PM
thefly
0 606
Hey there, I'm having trouble understanding this step: Could anyone explain or tell me what to read up on with...
Sep14-09 06:51 PM
JerBearr
0 644
I just want to see if I got this correct. From what all I've read it seems that I have most of it understood, but eh,...
Sep14-09 10:31 AM
rzaidan
3 1,710
I am reading through calc1 and reviewing Limits and Continuity/Discontinuity, I have so many questions! There is a...
Sep14-09 06:40 AM
HallsofIvy
3 2,102
Proposition: Let \{A_n\}_{n\in I} be a family of countable sets. Prove that \bigotimes_{i=1}^n A_i is a...
Sep14-09 06:29 AM
HallsofIvy
3 4,800
ok this is just an example so you can see where im having problems with these(it isnt hw) i need to find the...
Sep13-09 10:12 PM
LCKurtz
1 879
\oint what's the difference?
Sep13-09 08:48 PM
slider142
1 816
If you have a > b and c \geq d, do you have a + c > b + d?
Sep13-09 06:19 PM
Moo Of Doom
1 1,234
If you know \sqrt{(a^2+b^2)} < \epsilon, do you know a < \epsilon and b < \epsilon? If so, how?
Sep13-09 05:09 PM
AxiomOfChoice
2 730
...but I feel like I did something wrong. Also, this was a problem in my Analysis book, hence my posting it here,...
Sep13-09 06:53 AM
arildno
8 3,676
See diagram of hyperbolic sector confirmed with hyperbolic functions edit arcosh 1.73 should read arrccosh 2 =...
Sep13-09 05:47 AM
morrobay
0 3,544
The author of my calculus book defines an "almost upper bound" as follows: A number x is an almost upper bound for the...
Sep12-09 09:15 PM
HallsofIvy
5 876
Hi I know that the common explanation of derivatives is drawing a secant line through a graph and move one point...
Sep12-09 08:20 PM
slider142
3 1,059
Hi all, What happens when we take the product of the imaginary parts of all the n-roots of unity (excluding 1)? I...
Sep12-09 06:55 PM
acarchau
2 1,167
\int^{1}_{-1}f(x)dx = \sum^{n}_{j=-n}a_{j}f(x_{j}) Why does \sum_{j}a_{j} = 2 ? I know that the aj's are...
Sep12-09 01:16 PM
CFDFEAGURU
3 2,436
Hi I am trying to do this manually without excel, http://office.microsoft.com/en-us/help/HA100242441033.aspx I...
Sep12-09 12:09 PM
ojsimon
2 615
Let X be a normed vector space. If C is a closed subspace x is a point in X not in C, show that the set C+Fx is...
Sep12-09 08:17 AM
Marin
3 2,514
Why is the divergence operation called the 'divergence?' What is the significance of this operation on a vector-valued...
Sep12-09 02:50 AM
tiny-tim
2 923
Suppose we investigating the limit of a function on R^2 as (x,y) tend to (0,0). We convert the function into polar...
Sep11-09 07:04 PM
Legendre
3 911
Suppose we are given : PV = nRT, where n and R are constants. We are told to find the partial derivative dP/dV. ...
Sep11-09 07:03 PM
Legendre
3 1,865
Let (X,) be a measure space with (X) infinite. I'm trying to find an example of a pair (X,) and a sequence {f_n} of...
Sep11-09 05:13 PM
quasar987
7 1,624
Wikipedia gives an extensive amount of vector identities: http://en.wikipedia.org/wiki/Vector_calculus_identities...
Sep11-09 05:01 PM
lurflurf
4 7,380
I've seen this many times: someone will post a homework question asking them to prove something about an integral ...
Sep11-09 09:42 AM
Tac-Tics
2 1,517
-1-(under root)3 i here we find that r=2(hypotenuse) a=-1(base) b=-(under root)3 when i take sin theat=...
Sep10-09 02:29 PM
Elucidus
3 2,485

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