Question

Simplifique a expressão
(2n)!/(2n-2)!

Answer 1

Resolução:

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

$2n(2n-1)= 4 n^{2}-2n$

bons estudos:

Answer 2

2n(2n-1) (2n-2)! /(2n-2)! conta o (2n-2)!
=4n^2-2n