Question

Fatorial simplifique (n-4)!/(n-3)!

Answer 1

(n-4)! / (n-3)!=

(n-4)! / (n-3).(n-4)!=

1 /n-3.

Answer 2

$\sf\dfrac{(n-4)!}{(n-3)!}=\dfrac{(n-4).(n-5).(n-6)...3.2.1}{(n-3).(n-4).(n-5)...3.2.1}=\dfrac{1}{n-3}$