Question

Alguém me ajuda

Calcule o fatorial

Answer 1

e)

$\frac{12!}{9!} \\\\\\frac{12.11.10.(9.8.7.6.5.4.3.2.1)}{9.8.7.6.5.4.3.2.1} \\\\12.11.10 = 1320$

f)

$\frac{5!}{4!} . \frac{9!}{7!} \\\\5 . 9 . 8 = 360$