Question: O DISCRETE MATHEMATICS 2. Define a relation R on R by R = {(x, y) E R x R : there exists k E Z

O DISCRETE MATHEMATICS 2. Define a relation R on R by R = {(x, y) E R x R : there exists k E Z such that x - y = 2KTt} a. Prove that R is an equivalence relation. b. Find [0], [rt], [27t], [ pi/2]

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