Question

Simplifique as Expressões Abaixo:
A) (n + 2)! + (n + 1)!
(n + 1)!

B) n!
(n - 2)!

Answer 1

A)
[(n + 2)! + (n + 1)!]/(n + 1)!
(n + 2)!/(n + 1)! + (n + 1)!/(n + 1)!
(n + 2).(n + 1)!/(n + 1) + 1
(n + 2) + 1
n + 3

B)
n!/(n - 2)!
n.(n-1).(n-2)!/(n - 2)!
n.(n-1)
n² - n



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