Que: For a, b ∈ R define a = b to mean that |x| = |y|. If [x] is an equivalence relation in R. Find the equivalence relation for [17]. a. {,…,-11, -7, 0, 7, 11,…} b. {2, 4, 9, 11, 15,…} c. {-17, 17} d. {5, 25, 125,…} Answer: {-17, 17}