Question

Сократите дробь пожалуйста с факториалом 
(n+1)! / (n+3)!

Answer 1

(n+1)! / (n+3)! = (n+1)! / (n+1)! (n+2)(n+3) = 1/ (n+2)(n+3)

Answer 2

спасибо

Answer 3

n!=1*2*3*****n
(n+1)! / (n+3)!=(n+1)!/(n+1)!(n+2)(n+3)=1/(n+2)(n+3)