________________________________________________________
Rezolvarea la 1)
Conditiile de existenta x ≥ 3 si x ≥ 2 => D = [3 , +∞)
> restul atasat in imagini.
2)
A = {1,2,3,6}
Numarul total de submultimi egal cu combinari:
[tex]C_4^0 + C_4^1 +C_4^2 +C_4^3 + C_4^4 = 2^4 = 16[/tex]
