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3. Give formal proofs for each of the following tautologies by using the IP rule a. (A B)^(A v B) B b. (A B) (CVAC

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3. Give formal proofs for each of the following tautologies by using the IP rule a. (A B)^(A v B) B b. (A B) (CVAC v B) C. (A + B)^(B+C) ( AB C ) d. (C A)^(-C B) (A v B)

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