The answers to exercises marked IBB] can be found in the Back of the Book.
Let A = [1, 2, 3, 4, 5, 6} and let S = P{A), the power set of A.
(a) For a, b ∈ S, define a ~ b if a and b have the same number of elements. Prove that ~ defines an equivalence relation on S.
(b) How many equivalence classes are there? List one element from each equivalence class.
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