SOLUTION: (n+2)!(n-2)!-(n+1)!(n-1)!/(n)!(n-3)!
Algebra.Com
Question 415088: (n+2)!(n-2)!-(n+1)!(n-1)!/(n)!(n-3)!
Answer by Tatiana_Stebko(1539) (Show Source): You can put this solution on YOUR website!
...........
...........
...........
...........
RELATED QUESTIONS
n!(n+2)=n!+(n+1)!
(answered by LinnW)
(n+1)! /... (answered by swincher4391)
n(n-1)(n-2)=210
(answered by Alan3354)
Prove by induction
n*1 + (n-1)*2 + (n-2)*3 + ... + 3*(n-2) + 2*(n-1) + 1*n =... (answered by ikleyn)
{{{2^n -... (answered by ichudov)
Show that... (answered by jim_thompson5910)
11+n=-2(1-n) (answered by RAY100)
Factor Completely:
[n(n+1)/2]^2 + (n+1)^3
(answered by Tatiana_Stebko)
prove that: 1+2+3+....+n =... (answered by ikleyn)