Mathematics for IGCSE & O level - Sets (Section 2 - No. 31)

Which statement is an example of De Morgan's Law?

A ∩ B = B ∩ A

(A ∪ B)' = A' ∩ B'

A ∪ B = B ∪ A

(A ∩ B) ∪ C = A ∩ (B ∪ C)

解释

(A ∪ B)' = A' ∩ B'

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