Question

Calcular A7,3?????????

Answer 1

Resposta:

Arranjo simples:

$\boxed{\sf A_{n,p}=\dfrac{n!}{(n-p)!}}$

Seja n = 7 e p = 3:

$\sf A_{7,3}=\dfrac{7!}{(7-3)!}$

$\sf A_{7,3}=\dfrac{7!}{4!}$

$\sf A_{7,3}=\dfrac{7\cdot6\cdot5\cdot4!}{4!}$

$\sf A_{7,3}=7\cdot6\cdot5$

$\red{\sf A_{7,3}=210}$