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Let A=(2,3,5) and U={1,2,3,4,5,6,7,9} th...

Let A=(2,3,5) and U={1,2,3,4,5,6,7,9} then A'=U-A
i.e. A'={1,2,3,4,5,7,9}-{2,3,5}
={1,47,9}
For any set A and universal set U, by the law of double complemention, (A')'=A

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