SOLUTION: Show that (n + 1)^2 is a divisor of (n + 1)! + n! + (n - 1)!.

SOLUTION: Show that (n + 1)^2 is a divisor of (n + 1)! + n! + (n - 1)!.

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Question 747168: Show that (n + 1)^2 is a divisor of (n + 1)! + n! + (n - 1)!.
Answer by tommyt3rd(5050) (Show Source): You can put this solution on YOUR website!
the key is to rewrite the factorials so that they are in terms of (n-1)!

and then...

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