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

Feb2313 09:24 AM
micromass

1 
44,448 
So, in integrals that lead to inverse hyperbolics and can be solved with trigonometric substitution i just get lost. I...

May1811 04:37 PM
coelho

2 
946 
let f: X\rightarrow be a positive, measurable function on a sigmafinite measure space (X,A,u). If p>0, show that
...

May1811 04:31 PM
justin_huang

0 
671 
can a function in ONE dimension have NO inverse ?? i mean
if given the inverse function f^{1} (x) = g(x) +...

May1811 12:48 PM
lavinia

4 
1,033 
A book I'm reading now says the graph of f(x)=1/x is a closed set, how come??
Its range is . A set is closed iff...

May1811 12:29 PM
spamiam

4 
2,010 
I'm trying to take the derivative of a min function.
I have some function that depends on the variable x and a...

May1811 07:26 AM
chanttd

3 
6,464 
1. a sequence in R having no convergence subsequence
2. nonconvergent sequence in R such that the set of limit...

May1811 01:10 AM
JG89

3 
797 
Hi, I'm trying to find the book Differential and Integral Calculus by Gregor M. Fikhtenholz, however I've only found...

May1711 08:43 PM
fgyamauti

0 
652 
Can someone help me prove the identity
\ u \times (\nabla \times u) = \nabla(u^2 /2)  (u.\nabla)u
without...

May1711 07:05 PM
henry_m

7 
2,290 
I'm currently reviewing calculus that I learned 10 years ago, because I will be resuming an electrical engineering...

May1711 05:13 PM
Nebuchadnezza

4 
970 
I came across this problem + solution:
http://imageshack.us/m/715/2962/inteyk.png
but I don't understand the...

May1711 03:33 PM
HallsofIvy

12 
1,678 
Hi, I am working on a project for my research and am need of some advice.
My background is in computer engineering /...

May1611 11:01 PM
Stephen Tashi

1 
2,317 
Recently I have been self teaching myself complex analysis.
I am interested in the conformal mapping property of...

May1611 05:08 PM
henry_m

3 
1,231 
Lee 2003: Introduction to Smooth Manifolds (...

May1611 01:48 PM
Rasalhague

2 
1,125 
Show that the subsets of the plane are open:
1.) A= {(x,y)1<x<1,1<y<1}
2.) C= {(x,y)2<x2 + y 2<4}
I have no...

May1611 12:01 PM
dimitri151

7 
4,485 
If I'm lucky enough to pass Precalculus this semester, I'll be taking Calculus 1 next semester. Just out of curiosity,...

May1511 12:32 AM
Bogrune

17 
7,652 
for example int. (1+x^2)^0.5 dx
why do you use x= tan u
i mean obviously because it works, but if you didn't know...

May1411 03:35 PM
paulfr

7 
2,334 
Hello every one, now I'm dealing with a series
a(k) = k^(s)e^(tk), s,t > 0
I want to find a continuous function to...

May1411 04:35 AM
Char. Limit

8 
1,966 
Hi.
I've been studying for a test and have been scouring my text for methods of proving points in 3dimensional space...

May1411 02:26 AM
paulfr

10 
15,130 
Hello
The problem is
find the value of \lambda for \lim_{n \to \infty} \frac{a_{n+1}}{a_n} \nonumber\ < 1, where
...

May1311 10:26 PM
alejandrito29

2 
652 
Have I got the following definitions right. That's to say, do they express the idea behind "big oh" and "little oh"...

May1311 11:23 AM
Rasalhague

2 
1,151 
So I'd like to start out by asking why the interchanging of limits is phrased in terms of the property of uniform...

May1311 11:10 AM
micromass

1 
1,029 
I have difficulty in understanding why the differential d\varphi of a function \varphi: \eta \rightarrow F(\cdot,...

May1311 10:42 AM
yifli

0 
557 
Hello!
I am trying to transform a circle into a "quarter moon shape". This is that every point in the circle is...

May1311 09:37 AM
Carol_m

5 
1,076 
\documentclass{article}
\usepackage{amssymb,amsmath,amsbsy,amscd,fancyhdr}
\usepackage{eucal}
\usepackage{tikz}...

May1211 11:06 PM
rbwang1225

8 
1,260 
I feel like I have gone pretty far in math now, but I keep finding myself asking the same question.
Say I had a...

May1211 02:22 PM
HallsofIvy

6 
1,858 
I am assuming that the solution was arrived at through integration by parts, however I am not able to completely work...

May1211 08:36 AM
DiffusConfuse

4 
1,044 
Lee: Introduction to Smooth Manifolds, definition A.18:
He then shows, by the chain rule, that
D_vf(a_0)=...

May1211 07:15 AM
Rasalhague

3 
1,512 
I have a question about the (ε, δ)definition of limit
lim x>a x^5=a^5
I know that x^5a^5<ε
and xa<δ
I...

May1211 07:10 AM
HallsofIvy

4 
2,144 
Let's say I have a function that preservers ordering i.e if x<y then f(x)<f(y) for all x. Obviously it must follow...

May1211 12:44 AM
Mark44

2 
1,009 
i want to compute the integral
\iint_{D} f(x,y)dxdy here f(x,y) is a Rational function and the integral is...

May1111 05:18 PM
henry_m

4 
957 
Let \vec w(t) \;,\; \vec v (t) be 3 space vectors that is a function of time t. I want to verify that:
\frac...

May1111 03:15 PM
yungman

4 
873 
In a book I'm reading, it defines a bounded bilinear mapping \omega: X\times Y\rightarrow W, where X,Y and W are all...

May1111 08:45 AM
yifli

1 
942 
in general i'm trying to figure out a way to work with taylor series more efficiently. this means i want to be able to...

May1111 06:33 AM
mxbob468

1 
1,709 
Hello!
Please I need some help with this:
Is it possible to transform a circle into a rectangle? If so what...

May1111 06:30 AM
Carol_m

7 
1,089 
I'm having trouble with evaluating
xyz dx dy dz
over the region (x/a)^2 + (y/b)^2 + (z/c)^2 <= 1
Do I need...

May1011 06:00 PM
Ray Vickson

8 
4,802 
1) By applying the Mean Value Theorem to f(x)=sqrt x, show that 1/11 < (sqrt 102) 10 < 1/10.
This is a sample...

May1011 05:03 PM
awkward

5 
2,060 
*Bit of reading involved here, worth it if you have any interest in, or
knowledge of, differential forms*.
It...

May1011 03:55 PM
zetafunction

12 
2,085 
Which method do you use in integrating \int\((1\beta^{2})sin(\varphi)d\varphi/(1\beta^{2}(sin(\varphi)^{2})^{3/2}...

May1011 01:26 PM
LCKurtz

13 
1,876 
Hi guys,
how do a differentiation on a partial derivative e.g: d/dt (partial U / Partial X) ?
kinda confused about...

May1011 12:45 PM
Disconnected

1 
634 
LIMx\rightarrowinfinite (bn+an)1/n
it is given that 0<a<b
in this case why do we take bn or an common to make the...

May1011 11:28 AM
micromass

1 
659 