Question: Let A, B, C U. Prove that (A B) U C = A (B U C) if and only if C

Let A, B, C ⊂ U. Prove that
(A ∩ B) U C = A ∩ (B U C) if and only if C ⊂ A.

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Suppose that A B U C A B U C and that x C Then x C x A B U C x A B U C C A so x A and ... View full answer

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