Question

Encontre o valor do Arranjo A (11; 4). *
a) 7210
b) 7120
c) 7920
d) 7930

Answer 1

Explicação passo-a-passo:

$\sf A_{11,4}=\dfrac{11!}{(11-4)!}$

$\sf A_{11,4}=\dfrac{11!}{7!}$

$\sf A_{11,4}=\dfrac{11\cdot10\cdot9\cdot8\cdot7!}{7!}$

$\sf A_{11,4}=11\cdot10\cdot9\cdot8$

$\sf A_{11,4}=7920$

Letra C