Question

Simplifique esses fatoriais: a) n!/(n-1)! b) (n-1)! / (n-3)!

Answer 1

$a) \frac{n!}{(n-1)!} = \frac{n!}{(n-1).n!} = \frac{1}{(n-1)} \\ \\ b) \frac{(n-1)!}{(n-3)!} = \frac{(n-1)!}{(n-3)(n-2)(n-1)!} = \frac{1}{(n-3)(n-2)}$

Espero ter ajudado.