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Today,
07:42 PM
sinx
replied to a thread
Integration of gravitational force on a test particle in a uniform density disk
in
Calculus
can you write the expression you wish to integrate?
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1 replies | 17 view(s)
Today,
07:39 PM
sinx
replied to a thread
find s(x)=1/x+4/x^2+9/x^3+16/x^4+... (x>1).
in
Calculus
I just did it by observation. s(x)=1/x+4/x2+9/x3+16/x4+..... i.e. I 'observed' the numerator is the square of the power of x (in the denominator)....
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3 replies | 35 view(s)
Today,
07:34 PM
mmm4444bot
replied to a thread
Guidelines Summary
in
News
͏… t h r e a d ͏ ͏ ͏b͏ u͏ m͏ p ͏ ͏ ͏ o͏ n ͏l ͏y …
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1 replies | 1528 view(s)
Today,
07:16 PM
Subhotosh Khan
replied to a thread
Simple Trig Proof
in
Geometry and Trig
sin^2(θ) + cos^2(θ)=1 sin^2(θ) = 1 - cos^2(θ) ^2 = ^2 sin^4(θ) = 1 - 2*cos^2(θ) + cos^4(θ) continue...
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1 replies | 20 view(s)
Today,
06:56 PM
pka
replied to a thread
For any positive integer n, ....
in
Intermediate/Advanced Algebra
You should have used grouping symbols. In order for B to be the correct, the problem bust be: \dfrac{(n+1)!}{n!}-n=~?
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2 replies | 30 view(s)
Today,
06:36 PM
Subhotosh Khan
replied to a thread
For any positive integer n, ....
in
Intermediate/Advanced Algebra
That is factorial. Do you know what that is?
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2 replies | 30 view(s)
Today,
06:22 PM
topsquark
replied to a thread
Movie crypt
in
Math Odds & Ends
Oh I don't know if it's all that bad. I was once on a Forum talking about Alfred Hitchcock. The site changed it to Alfred Hitchrooster. -Dan
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5 replies | 56 view(s)
Today,
06:22 PM
TheAgileWarrior249
started a thread
Simple Trig Proof
in
Geometry and Trig
Use the Pythagorean Trig Identity, sin^2θ+cos^2θ=1, to prove that sin^4θ-cos^4θ=1-2cos^2θ. With the advice of my teacher, I started by making a...
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1 replies | 20 view(s)
Today,
06:18 PM
Alan Silverman
started a thread
Integration of gravitational force on a test particle in a uniform density disk
in
Calculus
So imagine a disk of radius "R" with a point "p" at arbitrary distance "r" from the center. I'm going to describe three regimes within this disk as...
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1 replies | 17 view(s)
Today,
05:53 PM
hdonley
started a thread
For any positive integer n, ....
in
Intermediate/Advanced Algebra
I am needing help to learn the process on how to answer this question. I learn best from seeing it worked out. For any positive intrger n,...
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2 replies | 30 view(s)
Today,
05:40 PM
mmm4444bot
replied to a thread
Movie crypt
in
Math Odds & Ends
see more
5 replies | 56 view(s)
Today,
05:29 PM
Denis
replied to a thread
exponential problem
in
Intermediate/Advanced Algebra
x = log(128)/log(5) y = log(32)/log(125) Are you allowed to use logs? If so, above will give -47
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1 replies | 22 view(s)
Today,
05:21 PM
mmm4444bot
replied to a thread
Movie crypt
in
Math Odds & Ends
Oh good! :D
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5 replies | 56 view(s)
Today,
05:17 PM
ketanco
started a thread
exponential problem
in
Intermediate/Advanced Algebra
5^x=128 125^y=32 then (2x+y)/(4y-x) = ? i tried writing in terms of each other but could not solve the answer is -47 , but dont know...
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1 replies | 22 view(s)
Today,
05:16 PM
aivirai
replied to a thread
free ebook I have written
in
Math Odds & Ends
:) just for fun. It does not exceede the amount you have written. The highest prize is 50 trillion dollars banknote that can be seen in this...
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4 replies | 145 view(s)
Today,
05:14 PM
Denis
replied to a thread
Beat Crypt?
in
Math Odds & Ends
aye, aye.... I'm going home with my football :razz:
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12 replies | 452 view(s)
Today,
05:12 PM
mmm4444bot
replied to a thread
Movie crypt
in
Math Odds & Ends
Have you assigned any "final referee" resource to this crypt? ;) Agree -- it's overkill.
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5 replies | 56 view(s)
Today,
05:10 PM
Denis
replied to a thread
Movie crypt
in
Math Odds & Ends
Not that important...we're playing around... I usually use dictionary/thesaurus.com
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5 replies | 56 view(s)
Today,
04:48 PM
mmm4444bot
replied to a thread
Beat Crypt?
in
Math Odds & Ends
I'm not sure what that has to do with cryptic clues posted at this site. (I cannot recall any competitions run by freemathhelp.) Are you trying to...
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12 replies | 452 view(s)
Today,
04:08 PM
yma16
replied to a thread
find s(x)=1/x+4/x^2+9/x^3+16/x^4+... (x>1).
in
Calculus
some one wrote the answer for me but no details.
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3 replies | 35 view(s)
Today,
03:59 PM
topsquark
replied to a thread
Wall of Shame
in
News
Yay! I'm going to have to look up my avatar at MHF. It's a ban button being hit repeatedly. :D -Dan
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23 replies | 2184 view(s)
Today,
03:53 PM
sinx
replied to a thread
find s(x)=1/x+4/x^2+9/x^3+16/x^4+... (x>1).
in
Calculus
the general expression is; s(x)=n2/xn where n goes from 1 up. is this what you are looking for?
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3 replies | 35 view(s)
Today,
03:41 PM
sinx
replied to a thread
Consumption rate: Let's say I make crisps. I have a bag of 1459 potatoes that....
in
Intermediate/Advanced Algebra
is this what you are asking for? 1459=100/mo (ridged) +25/mo (plain) + (9 mo)(25/mo) plain 1459-9(25)=125/mo (ridged and plain) /125=mos of both...
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3 replies | 209 view(s)
Today,
03:41 PM
yma16
started a thread
find s(x)=1/x+4/x^2+9/x^3+16/x^4+... (x>1).
in
Calculus
Someone told me to take derivative on both sides to get s(x) but I do not know how to do it. I figured out 1/x+2/x^2+3/x^3+4/x^4+...=x/(x-1)^2,...
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3 replies | 35 view(s)
Today,
03:31 PM
Denis
started a thread
Movie crypt
in
Math Odds & Ends
Undercover cop in **** movie treat. (7) sorry, no e's! **** = po rn (this site is too da mn catholic!!)
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5 replies | 56 view(s)
Today,
03:21 PM
Denis
replied to a thread
Beat Crypt?
in
Math Odds & Ends
Seriously, sites running crypt competitions always name a "dictionary/thesaurus" as "final referee"!!
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12 replies | 452 view(s)
Today,
03:00 PM
Denis
replied to a thread
Help with a Complex Equation
in
Pre-Algebra
Take a similar but easier case: 5 = 10/x x is clearly = 2, right?
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3 replies | 90 view(s)
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