Prove that if AI , A2, ... , An and BI , B2 , ... , Bn are
Chapter 4, Problem 4.1.38(choose chapter or problem)
Prove that if AI , A2, ... , An and BI , B2 , ... , Bn are sets such that Aj Bj for j = 1 , 2, ... , n, then n n U Aj U Bj. j = 1 j = 1
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