Question

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

Answer 1

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

(n+2-0)(n+2-1)(n+2-2)(n+2-3)!/(n-1)!

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

Simplifique os semelhantes:

(n+2)(n+1)(n)
(n²+n+2n+2)n
(n²+3n+2)n
n³+3n²+2n

Qualquer dúvida ou erro, comenta!