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2. Prove each of propositions are tautology. a) p(pVq) b) (pq)q are tautology. 2. Prove each of propositions a) p (p Vq) b) (p =

2. Prove each of propositions are tautology. a) p(pVq)

b) (pq)q

are tautology. 2. Prove each of propositions a) p (p Vq) b) (p = q) 9

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