Evaluate the proposed proof of the following result.Result For every three sets A, B and
Chapter 4, Problem 4.88(choose chapter or problem)
Evaluate the proposed proof of the following result.Result For every three sets A, B and C, (A C) (B C) (A B) C.Proof Let (x, y) (A C) (B C). Then (x, y) A C and (x, y) / B C. Since (x, y) A C,it follows that x A and y C. Since (x, y) / B C, we have x / B. Thus x A B. Hence(x, y) (A B) C.
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