Let A, B U. Prove that (a) (A B) (B A) = (A
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(a) (A × B) ∩ (B × A) = (A ∩ B) × (A ∩ B); and
(b) (A × B) ∪ (B ∪ A) ⊂ (A ∪ B) × (A ∪ B).
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Related Book For
Discrete and Combinatorial Mathematics An Applied Introduction
ISBN: 978-0201726343
5th edition
Authors: Ralph P. Grimaldi
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