6. Zaznacz na osi liczbowej zbiory A i B. Wyznacz zbiory: A\BiB\A. a) A = (-5; 2), B = {1,2} c) A = (-∞0; 4), B = {0} U (4; ∞0) d) A = {1,2,3}, B = {1} U (2;00) b) A = (3; ∞), B = {2,3,4}​