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  3. problem 4 20 points prove the follow statements 1 the...

Question: problem 4 20 points prove the follow statements 1 the...

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Problem 4: (20 points) Prove the follow statements: (1) The distributive law An (BUC)-(AnB)U(AnC): (Hint: Use the definition of set equality) (2) PA UB] = PABI t PABI + PlBA1; (Hint: Use the distributive law in Part (1)) 3) If AC B, then PA PB].

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