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Question: b a a b e c aa b e...

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(b) A = {a, {b), e). (c) A=(a, {b, e), ø}. (4) Decide whether the following statements are true of false. (a) If [a) P(A), then (a # A. (b) If X and Y are finite sets with IY-지 +1, then IP(Y)I (c) If W, X, Y, and Z are subsets of {x, y, z } with IWI [P(X) +2: =凹= zi = 2, then at least two of the four sets are equal. (5) Give examples of sets X, Y, and Z such that X * Y but X-Z = Y-Z.

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