Question

analise combinatória
calcule o valor ou simplifique:

(n+3)! . (n-1)!
(n-2)! (n+2)!

Answer 1

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

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

(n + 3)(n - 1)

R.: (n + 3)(n - 1)