Question

Desenvolver a conta, por favor ​

Answer 1

$\left( \begin{array}{c} n \\ m \end{array}\right)=\displaystyle\frac{n!}{m!(n-m)!}$

$\left( \begin{array}{c} 5 \\ 4 \end{array}\right)=\displaystyle\frac{5!}{4!(5-4)!} = \frac{5!}{4!1!} = \frac{5.4!}{4!}=5$

$\left( \begin{array}{c} 10 \\ 7 \end{array}\right)=\displaystyle\frac{10!}{7!(10-7)!} = \frac{10.9.8.7!}{7!3!} = \frac{10.9.8}{6}=\frac{720}{6}=120$

Answer 2

Resposta: Olá bom dia!

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