Question

(к+1)! /( к+2)! помогите пожалуйста

Answer 1

(k+1)!/(k+1)!(k+2)= 1/(k+2)

Answer 2

$cfrac{(k+1)!}{(k+2)!} = cfrac{(k+1)!}{(k+2)(k+1)!}= cfrac{1}{k+2}$