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

Feb2313 09:23 AM
micromass

1 
39,288 
Hi everybody!
i am trying to find out the right command to get the domain and the range of a specified function in...

Mar1312 05:11 AM
IngBay

0 
1,912 
Hello,
I have a polynomial having the form:
\beta x^5 + \beta^2 x^7 + \beta^3 x^9 + \ldots =...

Mar1312 07:59 AM
rasmhop

3 
1,298 
what is the precise definition of "parent functions" ?
I know that : f(x)=x ,f(x)=x^2 , f(x)=sqr(x) , f(x)=1/x ,...

Mar1312 06:24 PM
Hobin

4 
2,271 
This question started out as a thought experiment on a flight home from Japan a couple years ago. I've toyed with it...

Mar1312 09:07 PM
scurty

1 
1,071 
Given the expression:
e^{\sqrt{y}}
What numerical operator must this expression undergo to make it so that there...

Mar1412 10:11 AM
andydude

1 
1,152 
i know that if i am finding the order of rotations of certain element like rot(n), the order will be (2 (pi) ) / n....

Mar1412 05:14 PM
vinzz

0 
891 
If you laugh when reading this, you lose. :grumpy:
So, I was solving a bunch of extremely easy equations, and...

Mar1412 07:42 PM
Mark44

10 
1,399 
Im having issues with my weak algebraic skills trying to correctly rearrange the following equation for "d"
...

Mar1512 02:49 AM
tinytim

1 
890 
In the game of bridge, four players are dealt 13 cards each from a wellshuffled deck of 52 playing cards.
(a)What...

Mar1512 05:28 AM
tinytim

1 
935 
So here's a question for you, if on a line we chose one point, then what is the fraction of this point compared to the...

Mar1512 09:16 AM
A. Bahat

3 
922 
Here is a sum from MATHCOUNTS:
What are the last two digits in the sum of the factorials of the first 100 positive...

Mar1512 01:00 PM
piyushon2411

20 
40,478 
Hi, I am writing up a project based on an algorithm for factoring large numbers, I have reached seemingly simple point...

Mar1512 05:16 PM
bert2612

2 
1,185 
Hi everyone,
I'm currently looking to solve an equation of the general form: \sqrt{x^2y^2}+\sqrt{\epsilon...

Mar1612 01:14 AM
williams99

4 
892 
Hi, I have been working on some Mandelbrot wallpapers for some time but have so far only visualized the whole set i.e....

Mar1612 07:06 AM
kweierstrass

2 
1,020 
find the area of the triangle with vertices (1 2 1 2) (1 2 1 1) and (2 1 2 2)
its 4 d
Im confused
thanks in...

Mar1612 12:20 PM
dodo

10 
2,688 
A good book on Abstract Algebra that covers major undergraduate and graduate topics?
Something rigorous professional...

Mar1612 05:16 PM
dijkarte

5 
1,110 
I am trying to calculate Max CFM in a given pipe size(ranging from 1/2" 2") at a given pressure for an ongoing...

Mar1612 06:08 PM
AntnyC

0 
2,308 
what is the sum of the following series? I know it's convergent (using ratio test) but I'm not able to work it out :(...

Mar1712 03:23 AM
ZARman

2 
1,457 
I am trying to calculate the standard deviation of a group of data based on a 20 period sliding window. I have run...

Mar1712 09:47 AM
MrAnchovy

1 
1,216 
So I have this statement that I'm supposed to prove and I cannot for the life of me figure out what parts I'm allowed...

Mar1712 02:28 PM
Poopsilon

2 
857 
Hi,
Concerning only the upper right quadrant of an ellipse...
I know the distance from the center of the ellipse...

Mar1712 06:08 PM
JimEd

27 
2,551 
need hint/help or perhaps a solution :smile:
Equations are from Propeller Blade Theory. I´m trying to figure out how...

Mar1712 06:24 PM
D H

2 
1,185 
x*log(x)=0.1*x^2

Mar1712 10:37 PM
HallsofIvy

3 
1,107 
Hi,
I need a geometric explanation for this algorithm: Suppose we have the system Ax=b, where A is and MbyN...

Mar1812 04:33 AM
S_David

0 
894 
Hi,
I need to find the singular value decomposition (SVD) of a matrix H=H1+H2. Is this equivalent to sum the SVD...

Mar1812 08:14 AM
S_David

2 
727 
Suppose I have a regular histogram, I can normalize it by dividing the frequency counts by the total number of counts...

Mar1812 03:37 PM
mathman

1 
1,905 
So, I was working on computer science homework, and I decided that I would make a sequence, where there would be a...

Mar1812 09:54 PM
greggory

10 
1,799 
Given a function, it is easy enough to plot its curve, just by substituting numerical values.
But is the reverse...

Mar1812 10:41 PM
NascentOxygen

1 
885 
With the number i, its possible to create a wave function with just one variable.
example:
f(x)=i^x
or..
...

Mar1912 06:08 AM
johann1301

7 
1,029 
Hi All,
So here's my question:
Suppose we have two sets A and B, then A \setminus B denotes their...

Mar1912 01:13 PM
azal

3 
1,482 
I've been meddling with prime numbers a bit with my programming studies and managed to make an ulam spiral using...

Mar1912 03:52 PM
Russelluke

0 
1,173 
On pg 6 of http://www.scribd.com/doc/3914281/CrystalStructure, it quotes this result without proof. My notes from uni...

Mar1912 05:37 PM
RK7

3 
1,265 
A firm has the following totalcost and demand functions:
C = aQ^3  bQ^2 + cQ + d
Q = e  P
(d) Find...

Mar2012 07:44 AM
NascentOxygen

1 
1,338 
Is this correct?
A function ψ:A > B is the set:
ψ = { (x, y)  \forallx\inA\existsy\inB\ni(((x, y) \in ψ)...

Mar2012 12:22 PM
SteveL27

30 
2,182 
I want to prove x^3 + a^2x + b^2 = 0 has one negative and two imaginary roots if b \not= 0.
I know that it cannot...

Mar2012 03:35 PM
emailanmol

2 
1,215 
A quick question... what is the resultant expression if you multiply the cubic formula by 3a, add +b and then cube the...

Mar2012 03:37 PM
Frogeyedpeas

4 
1,036 
Here's a very interesting question:
Suppose you are given a cube and 6 different colours. You are asked to colour...

Mar2012 07:57 PM
bwood01

9 
1,083 
I'm trying to prove something in modular arithmetic that I came upon across my studies in comp sci. Consider a set of...

Mar2112 12:17 AM
chiro

4 
1,183 
$I\subset \reals$
$$\gamma_i:I_i\rightarrow M,\quad I_i\subset\reals,\quad i=1,2$$
$\sigma_{\alpha\beta}$ , let...

Mar2112 02:49 AM
slider142

3 
1,288 
What mathematics did Perelman use to prove Poicare's conjecture? Do you know any guide or any book?

Mar2112 06:47 AM
A. Bahat

2 
1,339 