Question

simplifique a expressao, n!/n-2!

Answer 1

$\boxed{\frac{n!}{(n-2)!}=\frac{n(n-1)(n-2)!}{(n-2)!}=n.(n-1)=n^2-n}$

Answer 2

N!(n-1).(n-2)!/(n-2)!

N(n-1)

N^2-n