Question: 4. a) Prove that ((p q)^(q + r)) ( pr) is a tautology using a truth table. b) Prove that p^(-p vg) ^ is a

4. a) Prove that ((p q)^(q + r)) ( pr) is

4. a) Prove that ((p q)^(q + r)) ( pr) is a tautology using a truth table. b) Prove that p^(-p vg) ^ is a contradiction using a truth table

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