3. Dla danych zbiorów A, B, C wyznacz zbiory A\B, A\C, C\A, C\B. (5, 6, 7, 9), B = {6,7,1}, C = {0,2} (5,6), B = {7,8), C = {5, 6, 7, 8) a) A b) A c) A = {1,2,3), B = {4,5,6), C = {7,8,9} d) A = {9, 8, 7, 6, 5, 4), B = {8, 7, 6,5), C = {7,6)​