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Apr
26
revised Finding out a limit using Taylor series.
edited tags
Apr
26
revised Finding out a limit using Taylor series.
added 3 characters in body
Apr
24
revised Why $\displaystyle\sum_{n=1}^\infty {\ln(n^2) \over (n^2) }$ converges?
added 12 characters in body
Apr
24
revised probability that you get one ace and the rest are face cards if you are dealt with 5 cards from a Standard Deck
added 1 character in body
Apr
6
revised Probability of at least one triangle in Erdos-Renyi graph
added 5 characters in body
Mar
26
revised How to solve $\lim_{x\to\infty}(x+2)e^{-\frac{1}{x}}-x$?
added 205 characters in body
Mar
15
revised How to Solve a Stars and Bars Discrete Math Problem
edited body
Mar
9
revised Solve the linear recurrence with initial conditions $a_n=a_{n-1}+2^n+1$ and $ a_0 =0$
edited title
Mar
9
revised Rearrangement of Students (flaw in my solution)
added 2 characters in body
Mar
9
revised Rearrangement of Students (flaw in my solution)
added 149 characters in body
Mar
3
revised Naive probability: Counting number of favorable outcomes
deleted 40 characters in body
Feb
15
revised Closed form of $\sum_{k=1}^{2015}(-1)^{k(k+1)/2}k$
added 6 characters in body
Feb
11
revised How to calculate $ \sum_{n=1}^{15}n(n!) = ? $
edited body
Feb
10
revised Finding closed form expression for a multiple sum.
deleted 2 characters in body
Feb
4
revised Combinatorial argument for $\sum\limits_{k=i}^{n}\binom{n}{k}\binom{k}{i} = \binom{n}{i}2^{n-i}$
edited tags; edited title
Feb
4
revised Possible closed form or approximation?
deleted 3 characters in body; edited tags
Feb
1
revised why is the limit as n goes to infinity of $(1+\frac{1}{n}+\frac{200}{n^2})^n = e$?
added 14 characters in body
Feb
1
revised What is sample variance of sample variance, and what is theoretical sampling distribution?
added 1 character in body; deleted 1 character in body; edited body; added 1 character in body
Jan
25
revised Prove $\sum\limits_{i=1}^{n-k} (-1)^{i+1} \cdot \tfrac{(k-1+i)!}{k! \cdot(i-1)!} \cdot \tfrac{n!}{(k+i)! \cdot (n-k-i)!}=1$
edited body
Jan
24
revised Show that $\lim_{n\to\infty}n+n^2 \log\left(\frac{n}{n+1}\right)= 1/2$
edited body