Question

Simplifique esse fatorial (n+2)!/(n-1)! ?

Answer 1

$\frac{(n+2)!}{(n-1)!}=\frac{(n+2)(n+1)n(n-1)!}{(n-1)!}=(n+2)(n+1)n=n^3+3 n^2+2 n$