Question

20- Simplifique

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

b) (n - 2)!
n!​

Answer 1

Resposta:

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

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