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Exercise 1: (10 points each; tolal Let p,q, and r be three propositions. Using trathentions, or neither. any) of the propositions below are tautologies, a)

Exercise 1: (10 points each; tolal Let p,q, and r be three propositions. Using trathentions, or neither. any) of the propositions below are tautologies, a) A=(pq)r(qr)(pr) b) [p(qr)](pqr)

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