if x and y be any two sets then show that (xy)'=(x'y) U (xy') U (x'y')
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Answer:
We have X∩(Y∪X)
′
=X∩(Y
′
∩X
′
)
= X∩Y
′
∩X
′
=X∩X
′
∩Y
′
= ϕ∩Y
′
=ϕ
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