Let A, B, and C be sets. Show that a) (A U B) (A U B U C).
Chapter 2, Problem 2.2.18(choose chapter or problem)
Let A, B, and C be sets. Show that a) (A U B) (A U B U C). b) (A n B n C) (A n B). c) (A - B) - C A-C. d) (A - C) n (C - B) = 0. e) (B - A) U (C - A) = (B U C) - A.
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