Question

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

Me ajudem

Answer 1

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

Espero ter ajudado.

Answer 2

 (n+1).n.(n-1)! / (n-1)! = (n+1).n = n2 + n  {simplifica (n-1) sobra (n+1).n}