Question

Rezolvati ecuatia n!=720
Rezolvati inecuatia n!≤720

Answer 1

n!=6!=1*2*3*4*5*6=24*5*6=120*6=720
n=6
inecuatia, pt n ∈N, 0! avand sens si fiind 1, are solutiile
n∈{0;1;2;3;4;5;6}