Question

Questão sobe fatorial, alguém?

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

Answer 1

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

Espero ter ajudado.