If U is universal set, then which of the following is not true ?

(A^c)^c= A

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U^c= ф

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A^c = ф

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(A U B)^c = A^cU B^c

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Solution

The correct option is D
(A U B)^c = A^cU B^c

The complement of the union of two sets is the intersection of their complements.

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