Explanation of De-Morgan's law using an example?

Answers (1)
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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