2. Wyznacz zbiory: AUB, AnB, A\B, B\A,
gdy:
a) A = {-2,-1, 0, 1, 2}, B = {-3,-1, 1,3},
b) A = {2, 1, 2,4}, B = {0, 1, √2, √4},
c) A = N. B = Z.
