Question

Simplifique a expressão e marque a resposta correta
(n + 1)! − (n − 2)! / n !

Answer 1

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

$\frac{(n + 1) \times n \times (n - 1) \times (n - 2) ! - (n - 2) ! }{n \times (n - 1) \times (n - 2) !}$

$\frac{((n + 1) \times n \times (n - 1) - 1) \times (n - 2) ! }{n \times (n - 1) \times (n - 2) ! }$

$\frac{( {n}^{2} - 1)n - 1 }{n \times (n - 1)}$

$\frac{ {n}^{3} - n - 1}{ {n}^{2} - n }$

$letra \: a)$