Please post any and all homework or other textbookstyle problems in one of the Homework & Coursework Questions...

Feb2313 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...

Sep2009 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=...

Sep1909 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...

Sep1909 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) =...

Sep1909 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...

Sep1809 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...

Sep1709 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...

Sep1709 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...

Sep1709 06:23 PM
AxiomOfChoice

4 
783 
Greetings,
I am a computer scientist revisiting integration after a long time. I am stuck with this simplelooking...

Sep1709 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...

Sep1709 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...

Sep1709 10:43 AM
jambaugh

5 
983 
http://bildr.no/thumb/489513.jpeg
http://bildr.no/thumb/489514.jpeg
http://bildr.no/thumb/489526.jpeg...

Sep1709 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...

Sep1609 11:34 PM
yungman

2 
627 
Here is the problem exactly how it is written on my paper...
Consider the surfaces x^2+2y^2z^2+3x=1 and...

Sep1609 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?

Sep1509 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)...

Sep1509 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...

Sep1509 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...

Sep1409 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,...

Sep1409 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...

Sep1409 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...

Sep1409 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...

Sep1309 10:12 PM
LCKurtz

1 
879 
\oint what's the difference?

Sep1309 08:48 PM
slider142

1 
816 
If you have a > b and c \geq d, do you have a + c > b + d?

Sep1309 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?

Sep1309 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,...

Sep1309 06:53 AM
arildno

8 
3,676 
See diagram of hyperbolic sector confirmed with hyperbolic functions edit arcosh 1.73 should read arrccosh 2 =...

Sep1309 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...

Sep1209 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...

Sep1209 08:20 PM
slider142

3 
1,059 
Hi all,
What happens when we take the product of the imaginary parts of all the nroots of unity (excluding 1)?
I...

Sep1209 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...

Sep1209 01:16 PM
CFDFEAGURU

3 
2,436 
Hi
I am trying to do this manually without excel, http://office.microsoft.com/enus/help/HA100242441033.aspx
I...

Sep1209 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...

Sep1209 08:17 AM
Marin

3 
2,514 
Why is the divergence operation called the 'divergence?' What is the significance of this operation on a vectorvalued...

Sep1209 02:50 AM
tinytim

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...

Sep1109 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.
...

Sep1109 07:03 PM
Legendre

3 
1,865 
Let (X,µ) be a measure space with µ(X) infinite. I'm trying to find an example of a pair (X,µ) and a sequence {f_n} of...

Sep1109 05:13 PM
quasar987

7 
1,624 
Wikipedia gives an extensive amount of vector identities:
http://en.wikipedia.org/wiki/Vector_calculus_identities...

Sep1109 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 ...

Sep1109 09:42 AM
TacTics

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=...

Sep1009 02:29 PM
Elucidus

3 
2,485 