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

Feb2313 09:23 AM
micromass

1 
39,255 
For example;
Please tell me which are false and true.
If false explain why, don't just say because so and so...

Y 09:13 PM
FactChecker

7 
210 

 
 
 
In the classic proof of irrationality of SQRT(2) we assume that it can be represented by a rational number,a/b where...

Y 07:27 PM
CKH

6 
221 
Hey!
I was wondering, is it a bad idea to solve a math problem mentally instead of writing it down? I recently got...

Y 12:21 AM
homeomorphic

9 
270 

 
 
 
3 + 7i < 5
Is that a valid statement?
Would that be taking the magnitude of 3 + 7i and comparing that to the...

Sep1514 09:02 PM
Curious3141

10 
242 
Is there an intuitive reason or proof demonstrating that in general dimensions, there is no direct analogue of the...

Sep1514 04:17 PM
pwsnafu

5 
210 
So look at what Ive done:
{n+1 \choose k} = \frac {(n+1)!} {(n+1k)! \cdot k!} = \frac {(n+1)\cdot...

Sep1414 08:35 PM
Mentallic

3 
179 
Somebody can give me some tips? I'm really bad at this.

Sep1414 07:53 PM
Dnomyar

4 
230 
Hello everyone!
I am a new member of this forum and this is my first post. At the moment, I am looking for the...

Sep1414 08:00 AM
Mentallic

4 
216 
I've just noticed that i have a fundamental lack of understanding in a specific aspect of math, and I can't find where...

Sep1414 07:54 AM
HallsofIvy

3 
193 
I know that by definition, a/(b/c)= a x 1(b/c)....but from there I am lost. Help please!

Sep1314 09:57 PM
CKH

4 
234 
From the Intermediate Value Theorem, is it guaranteed that there is a root of the given equation in the given...

Sep1314 01:27 PM
gopher_p

3 
158 
I've been thinking about this for some time. Now I'm coming on here in the hope of getting some help;
Prove that...

Sep1314 09:48 AM
Sheepwall

6 
240 
I have a simple question that probably has a complicated answer. How do I prove theorems? Like, prove that the square...

Sep1314 05:40 AM
disregardthat

4 
225 
Hi everyone,
I recently began a grad program and we have started taking a course in stochastic methods. However I...

Sep1214 07:56 PM
caveman1917

13 
472 
The general equation of a parabola is:
(y  y1) = A(x  x1)^2
A is the scaling factor
y1 is the y coordinate of a...

Sep1214 03:32 PM
kevinshen18

5 
268 
The reason I have that in quotes is because by definition, elements in a set must be unique, and there is no concept...

Sep1214 02:26 PM
WWGD

3 
214 
Dear All
My water tank fixed on roof top 5M from the ground
Height of tank 1m
width of tank .75m ( Cylinder...

Sep1114 03:43 PM
SSWheels

11 
1,658 
Guys,
I have a problem I'm trying to solve for work (we're trying to inspect a hole, and I'm trying to determine...

Sep1114 10:11 AM
SSWheels

6 
1,348 
x + 0 = x
x  0 = x
x(0) = 0
x(0) = undefined ...is this how you call it or is it no solution?
x^0 = ??? ...

Sep1114 09:24 AM
HallsofIvy

10 
403 
Without any rough work

Sep1114 01:20 AM
willem2

15 
419 
How to solve this:
log(base16)x + log(base4)x + log(base2)x = 7
If I have log(base16)x for example and i make ...

Sep1014 06:53 PM
Integral

2 
263 
Hi,
can't solve following prob:
Let a, b and c be real numbers.
Given that a^2, b^2 and c^2 are in arithmetic...

Sep1014 12:48 PM
willem2

2 
245 
Ok so for the problem i'm mainly having trouble with setting up one of the equations.
The solutions manual jumped...

Sep914 07:30 PM
gopher_p

3 
339 
Hi, Mathematica is telling me the value of this series, but I can't figure out how to do it on paper. Can someone...

Sep914 07:07 PM
WWGD

3 
262 
Is the tangents function tan(x) continuous when x = 90 degrees or x = pi/2?

Sep914 03:01 PM
caveman1917

16 
434 
Hi all,
I should start by saying I'm an amateur at mathematics so please excuse me if the question seems a bit...

Sep914 12:13 PM
jedishrfu

7 
441 
Full title: Relationship between the constructibility of regular polygons and the reducability of trigonometric...

Sep914 08:35 AM
...

0 
248 
I show that the assoc. property applies to addition and multiplication in my book:
(a+b)+c = a+(b+c)
(ab)c = a(bc)...

Sep914 07:44 AM
HallsofIvy

4 
238 
For proving this equation:
\delta (g(x)) = \sum _{ a,\\ g(a)=0,\\ { g }^{ ' }(a)\neq 0 }^{ }{ \frac { \delta...

Sep914 07:07 AM
PaulDirac

1 
210 
Hi, I'm not the best with algebra and I've been wrestling with a formula this afternoon. It is a formula to calculate...

Sep814 11:54 PM
wallybanger

9 
364 
(e^{1+i*2*pi})^{1+i*2*pi}=e^{(1+i*2*pi)(1+i*2*pi)}
why is this false (according to Wolfram Alpha) ?

Sep814 07:32 PM
WWGD

3 
293 
Can anyone help me set this problem up?
I am trying to figure out how to Prove the Sander's Parallelogram.
See...

Sep814 02:56 PM
MrAnchovy

2 
248 
I only see positive factors in my book. Example: 2 and 2 are factors of 4. But aren't 2 and 2?
Is there some...

Sep814 08:15 AM
PeroK

1 
272 
A=12^(1/5)
Log(A)=(1/5)Log(12)
The next part in the book says:
Log(A)=0.2158
A=1.644
I don't know how to do...

Sep714 01:47 PM
Zaent

3 
240 
I'm trying to check my understanding of rotations in the complex plane. Do I have any of this wrong? If so, can you...

Sep714 01:43 PM
DiracPool

2 
223 
This is frustrating me.
The formula for division of fractions in my PreCalculus book is a/b = a x 1/b.
...

Sep714 01:28 PM
DiracPool

2 
283 
Any ideas?

Sep714 12:02 PM
mizen

17 
428 
I've noticed that the vast majority of named or important mathematical constants, are what you might call small...

Sep714 11:14 AM
Boorglar

7 
286 