Question

Qual é a resposta do fatorial (n -1)/(n +1) ?

Answer 1

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

Answer 2

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