If U={1,2,3,4,5,6,7,8,9} is a universal set, A={1,2,3,4,}and B={3,4,5,6,7} are two sets then,
(A ∪ B)={1,2,3,4,5,6,7}
(A ∪ B)’={8,9}
A’={5,6,7,8,9}
B'={1,2,8,9}
(A’ ∩ B’)={8,9}
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