Hey, I was wondering if someone could help me with a specific type of question that I can't seem to understand without an answer key. Anyway, it's rewriting expressions with factorial notation so that they no longer have factorial symbols.(adsbygoogle = window.adsbygoogle || []).push({});

Example:

Simplify without using the factorial symbol:

(n-2)!(n+1)!/(n!)²

The answer is: n+1/n(n-1)

What I don't understand is how you come to that conclusion. Can someone explain this to me?

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# Homework Help: Factorial Notation

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