Question

Calcule : a) 11! b) 12!+4 c) 6!3! d) 18!
13!

Answer 1

a)

11! = 11 . 10 . 9 . 8 . 7 . 6 . 5 . 4 .3 . 2 . 1 = 39916800

b)

12! + 4 = 12 . 11 . 10 . 9 . 8 . 7 . 6 . 5 . 4 . 3 . 2 . 1 + 4 = 479001600 + 4 = 479001604

c)

6!.3! = 6 . 5 . 4 . 3 . 2 . 1 . 3 . 2 . 1 = 4320

d)

$\frac{18!}{13!}=\frac{18.17.16.15.14.13!}{13!}$

Corta o que é igual nas duas partes

$18.17.16.15.14 =1028160$