Question

Calcule os numeros binominais (6 sobre 4)

Answer 1

Explicação passo-a-passo:

$\sf \dbinom{6}{4}=\dfrac{6!}{4!\cdot(6-4)!}$

$\sf \dbinom{6}{4}=\dfrac{6!}{4!\cdot2!}$

$\sf \dbinom{6}{4}=\dfrac{6\cdot5\cdot4!}{4!\cdot2!}$

$\sf \dbinom{6}{4}=\dfrac{6\cdot5}{2!}$

$\sf \dbinom{6}{4}=\dfrac{30}{2}$

$\sf \dbinom{6}{4}=15$