Question

Aranjamente de 4luate cate 1????

Answer 1

Salut,

Formula o știi ?

$A_n^k=\dfrac{n!}{(n-k)!},\ unde\ n=4,\ k=1,\ deci\ A_4^1=\dfrac{4!}{(4-1)!}=\dfrac{4!}{3!}=\dfrac{4\cdot 3\cdot 2\cdot 1}{3\cdot 2\cdot 1}=4.$

Green eyes.