SOLUTION: (n+1)! / 3!(n-2)!

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Question 443419: (n+1)! / 3!(n-2)!
Answer by swincher4391(1107) About Me  (Show Source):
You can put this solution on YOUR website!
Rewrite (n+1)! as (n+1) * n * (n-1) * (n-2)!
%28%28n%2B1%29+%2A+n+%2A+%28n-1%29+%2A+%28n-2%29%21%29%2F%283%21%28n-2%29%21%29

%28%28n%5E2%2Bn%29%28n-1%29%29+%2F+%283%2A2%2A1%29
highlight%28%28n%5E3+-+n%29+%2F+6%29