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Mar
9
awarded  Popular Question
Feb
22
comment Let X be a random variable with $E(X^m) = (m+1)!2^m$,m = 1,2,3,… Find the density of X.
how to compute the the moment generating function of x?
Feb
22
asked Let X be a random variable with $E(X^m) = (m+1)!2^m$,m = 1,2,3,… Find the density of X.
Feb
13
comment To prove $\sum_{n=0}^\infty \binom{r}{x}\binom{N-r}{n-x}=\binom{N}{n}.$
soory my bad the limits are from 0 to n and x is varying
Feb
13
revised To prove $\sum_{n=0}^\infty \binom{r}{x}\binom{N-r}{n-x}=\binom{N}{n}.$
edited body
Feb
13
asked To prove $\sum_{n=0}^\infty \binom{r}{x}\binom{N-r}{n-x}=\binom{N}{n}.$
Dec
9
awarded  Famous Question
Dec
5
awarded  Popular Question
Nov
3
awarded  Popular Question
Jun
15
awarded  Yearling
Jun
1
awarded  Popular Question
Apr
8
revised The maximum value of expression $ \sqrt{\sin^2x+ 2a^2} - \sqrt{-1 -\cos^2x+ 2a^2} $
edited body; edited title
Apr
8
comment The maximum value of expression $ \sqrt{\sin^2x+ 2a^2} - \sqrt{-1 -\cos^2x+ 2a^2} $
yes that square root
Apr
8
asked The maximum value of expression $ \sqrt{\sin^2x+ 2a^2} - \sqrt{-1 -\cos^2x+ 2a^2} $
Apr
8
asked Find the last three digits of $17^{256}$
Apr
7
accepted How to calculate the coordinates of orthocentre.!!
Jan
27
awarded  Popular Question
Nov
19
accepted Find the possible values of |A + B + C |
Nov
18
comment Find the possible values of |A + B + C |
anyone????????????
Nov
18
asked Find the possible values of |A + B + C |