Question

calcule:

a) 4! . 9!/10! . 7! =

b) 15!/12! =​

Answer 1

Resposta:

$4i \times \frac{9i}{10i} \times 7i = 4i \times \frac{9i}{10 \times 9i} \times 7i = 4i \times \frac{1}{10} \times 7i = 12096$

b)

$\frac{15 \times 14 \times 13 \times 12i}{12i} = 15 \times 14 \times 13 = 2730$