Question: solve *25. (a) Prove that for any sets A and B, A C B if and only if P(A) C P(B). (b) Prove that for

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*25. (a) Prove that for any sets A and B, A C B if and only if P(A) C P(B). (b) Prove that for any sets A and B, P( An B) = P(A) nP(B)

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