Question

Combinari de 5 luate cate 5 ?????

Answer 1

Salut,

Știm formula (o știai ?):

$C_n^k=\dfrac{n!}{k!\cdot (n-k)!}.\\\\C_5^5=\dfrac{5!}{5!\cdot (5-5)!}=\dfrac{5!}{5!\cdot 0!}=1,\ am\ folosit\ c\breve{a}\ 0!=1.$

Green eyes.