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

Feb2313 09:23 AM
micromass

1 
38,821 
given that a=(6.0+/0.1) and b=(17.5+/0.3)
what is 2a^2 + b^2
i'm having so much trouble with this
i think we...

Sep2007 12:14 PM
Diffy

6 
3,005 
Sorry, i have problem in this question which comes from my textbook. I couldn't solve it and i would like someone to...

Sep2007 02:43 AM
danong

3 
1,787 
I've been thinking about this for a bit and I was wondering how one would go proving the irrationality of an...

Sep2007 01:18 AM
Curious3141

6 
1,549 
Laydies and Gents
can anyone help me here? suppose there are well known formulas for this.
That is, contact...

Sep1907 07:03 PM
AlephZero

6 
5,924 
I'm reading the wikipedia article on them and I can't really get an understanding of what they are.
I'm writing a...

Sep1907 05:14 PM
saharmonfared

3 
2,249 
Hopefully this isn't a foolish question but, I am up to CalcII and am anxious to apply what I've learned but have...

Sep1907 03:56 PM
ice109

5 
1,424 
i know theres a science book review subforum but i figured this wouldn't get much attention there as it's a math book....

Sep1907 02:27 PM
ice109

0 
1,112 
Im In a 1st Year University math class and its been a while since i did this stuff and cant remember if im doing this...

Sep1907 11:38 AM
Diffy

2 
1,319 
In Munkres' Topology he defines a Cartesian product AxB to be all (a,b) such that a is in A and b is in B. He says...

Sep1907 11:12 AM
Hurkyl

3 
2,233 
I was just wondering if you could write a functions domain and range with a set?
Would it be something like
D:...

Sep1907 07:38 AM
JonF

5 
11,281 
Since the positive reals aren't denumerable (or so do I read) and the positive rationals are, then that must mean the...

Sep1907 06:40 AM
mathwonk

19 
2,967 
A surveyor stands on flat ground at an unknown distance from a tall building. She measures the angle from the...

Sep1907 06:31 AM
HallsofIvy

1 
1,784 
my teacher told me to think about this and i don't seem to get it. given vectors X,Y,& Z; is there geometric...

Sep1907 05:57 AM
HallsofIvy

15 
2,120 
is there a fuzzy number theory, u know on the lines of the normal number theory??? could someone pls tell me abt any...

Sep1907 01:09 AM
bob1182006

1 
2,024 
I am trying to derive this identity but cant seem to get anywhere:
...

Sep1907 12:05 AM
DavidSmith

0 
2,604 
Hello. As some of you know I'm a chemistry student, but I plan to take some math for the hell of it next summer. ...

Sep1807 10:30 PM
Howers

2 
1,596 
I have a question that says: prepare a table of values and plot the graph for the domain (pie,pie) for the function...

Sep1807 07:56 PM
Math Jeans

2 
3,146 
In Rudin's Principles of Mathematical Analysis, 3rd ed., I encountered the following on p. 10, and I'm not really sure...

Sep1807 07:30 PM
michaelxavier

2 
1,152 
There are in fact many "information theories".
Broadly speaking all of these actually define a notion of...

Sep1807 03:13 PM
Chris Hillman

13 
6,228 
well i am having trouble understanding why we need the axiom of choice. So could anybody post here some problems, and...

Sep1807 02:14 PM
mathwonk

9 
3,160 
Hi all,
Can I know if there's an algorithm to find overlapping area(shadded red) of two triangles?(Please see...

Sep1807 09:44 AM
thian_seng

0 
2,716 
I'm trying to create a formula from unit circle to square centered at origin with side length 2.
The formula I have...

Sep1707 09:40 PM
ky2168

0 
4,035 
Hi all
Just wondering if someone could help me out this...
I have two loans of differing amounts and interest...

Sep1707 03:52 PM
phoenixthoth

2 
1,096 
How do I find the sup of rationals (p/q, where q is even) that is less than sqrt(10)?
gcd(p,q)=1

Sep1707 09:45 AM
HallsofIvy

13 
2,052 
I have a solution for a PDE
U(x,t)=y^2e^{3x} + h(x)
Where h(x) is any function such that h(0) = 1
What...

Sep1607 10:22 AM
axeae

11 
3,586 
suppose a curve is not uniformly curved and i would like to describe how "curvy" a segment of this curve is? how would...

Sep1607 06:37 AM
arildno

7 
2,629 
I'm having trouble relating the cross product form absin(theta) to its component form (a1b2  a2b1) ... and so...

Sep1507 01:18 PM
robphy

8 
2,124 
I wrote my own graphing software, and I thought it had a bug in it, because when I graphed x^x, the curve starts out...

Sep1507 11:08 AM
HallsofIvy

17 
2,951 
one of my cousins asked me what the mathematical logic/mathematical explanation are behind the definitions of scalar...

Sep1507 10:31 AM
CompuChip

9 
1,242 
hey, i'm a newbie in this field.....just know how to add, subtract, multiply, and divide fuzzy numbers.... but want to...

Sep1507 12:57 AM
bob1182006

3 
2,890 
http://www.cynicalc.com/archives/bloggraphics/_42842559_maths_diagram_416.gif
Looking at the figure makes me...

Sep1507 12:42 AM
Werg22

10 
1,751 
Hello everyone im' stuck on this problem.
It says:
Each symbol in braille code is represened by a rectangular...

Sep1407 06:40 PM
roadrunner

2 
1,589 
\frac 1{3x^2x2}<0
I understand that in algebra inequalities, one side has to be made zero but in the equation...

Sep1407 04:03 PM
symbolipoint

9 
1,451 
I'm having a little difficulty understanding Epsilon in the definition of convergence. From what the book says it is...

Sep1307 10:18 PM
Scousergirl

4 
3,190 
if the polynomial x^3+3x^2+9x+3 is a factor of x^4+4x^3+6Px^2+4Qx + R, what is R(P+Q)?

Sep1307 11:55 AM
uart

10 
1,737 
if two rational numbers added together is still rational then wouldn't an infinite sume of rational numbers that...

Sep1307 09:43 AM
HallsofIvy

7 
7,390 
Well I came across this when someone asked me this question:
(2)^n = 16
I can clearly see n=4. However, he did...

Sep1307 04:57 AM
prasannapakkiam

5 
20,665 
x^{5}=5y^{3}4z
y^{5}=5z^{3}4x
z^{5}=5x^{3}4y
We get five solutions (0,1,1,2,2) for x=y=z. But it's hard to...

Sep1207 05:35 PM
AlephZero

8 
2,495 
I am looking for any textbooks that closely resemble "Elements of Modern Algebra" by Gilbert & Gilbert both in its...

Sep1207 05:30 PM
shaftencoder

0 
893 
Hi I have some questions. If you're doing a MacLaurin expansion on a function say sinx or whatever, if you take an...

Sep1207 08:41 AM
genneth

1 
1,875 