List questions from factorial

Published on 05 Nov 2015 - 14:00

460

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Show $\sum^\infty (2n-3)!!/(2n)!!$ converges

Published on 05 Nov 2015 - 21:29

532

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Divisibility of factorials

Published on 06 Nov 2015 - 12:15

74

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Combinatorics Question. Id like a thorough explanation. Especially the part about multiplying or dividing each side and when its OK to do so.

Published on 07 Nov 2015 - 0:19

2.5k

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How many "words" of any length can be made from the letters in TREATS?

Published on 07 Nov 2015 - 15:40

2.4k

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Does series with factorials converge/diverge: $\sum\limits_{n=1}^\infty \frac{4^n n!n!}{(2n)!}$?

Published on 01 Apr 2026 - 17:41

58

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Need help in following problems related to combinatorial analysis.

Published on 03 Apr 2026 - 9:23

78

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Dividing factorial of a number using another factorial

Published on 10 Nov 2015 - 21:39

117

Views

Using induction to prove the inequality $n!\ge 2^{n-1}$

Published on 11 Nov 2015 - 0:15

154

Views

Breaking apart factorials

Published on 11 Nov 2015 - 16:06

119

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Proof (cases & induction): Find the set of positive integers such that $n! \geq n^3$

Published on 11 Nov 2015 - 21:47

57.4k

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How many ways can I choose 5 items from 10?

Published on 12 Nov 2015 - 5:12

2.8k

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Factorials and their perfect squares

Published on 12 Nov 2015 - 16:14

101

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Asymptotic growth of products of powers of primes vs factorials

Published on 16 Nov 2015 - 17:12

3.9k

Views

Prove $n! < (n/2)^n$ by induction

Published on 17 Nov 2015 - 2:38

List Question

How to expand a factorial expression with $N$ and $m$

Show $\sum^\infty (2n-3)!!/(2n)!!$ converges

Divisibility of factorials

Combinatorics Question. Id like a thorough explanation. Especially the part about multiplying or dividing each side and when its OK to do so.

How many "words" of any length can be made from the letters in TREATS?

Does series with factorials converge/diverge: $\sum\limits_{n=1}^\infty \frac{4^n n!n!}{(2n)!}$?

Need help in following problems related to combinatorial analysis.

Dividing factorial of a number using another factorial

Using induction to prove the inequality $n!\ge 2^{n-1}$

Breaking apart factorials

Proof (cases & induction): Find the set of positive integers such that $n! \geq n^3$

How many ways can I choose 5 items from 10?

Factorials and their perfect squares

Asymptotic growth of products of powers of primes vs factorials

Prove $n! < (n/2)^n$ by induction

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