Let R, and R2 be the "congruent modulo 3" and the
Chapter 8, Problem 8.1.39(choose chapter or problem)
Let R, and R2 be the "congruent modulo 3" and the "congruent modulo 4" relations, respectively, on the set of integers. That is, R, = {(a, b) I a == b (mod 3)} and R2 = {(a, b) I a == b (mod 4)}. Find a) R, U R2. b) R, n R2. c) R, - R2. d) R2 - R,. e) R, E9 R2.
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