Can anybody help me solving this?(adsbygoogle = window.adsbygoogle || []).push({});

Write in terms of factorials

n((n^2)-1)

The correct answer is

(n+1)!/(n-2)!

but I don't know how to get there, and since it's week- end I have no chance to ask anyone teachers, etc.

//Martin

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# Sequences - factorial r, !

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