Nuuuuuuuuuuu1 Nuuuuuuuuuuu1 05-01-2017 Matematică a fost răspuns 1.Calculati A = {1,2,3,7,9} , B = {2,3,4,7} A ∪ B , A ∩ B, A \ B , A / B. Va rog am nevoie.