4. compliment of a set : if a be a set then its compliment set is denoted by a or a' or a and a° or a' or {xx a but x e u} a/a'/Ā example, a = {2, 3, 6} b {1, 3

4. Compliment of a Set : If A be a set then its compliment set is denoted by A or A' or A and A° or A' or {xX A but x e U} A/A'/Ā Example, A = {2, 3, 6} B {1, 3, 4) U = {1, 2, 3, 4, 5, 6} then A= {1, 4, 5} B' (2, 5, 6}