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P1.8.7 Prove that the compound propositions p^(q + r) and -(p + (q^-r)) are equivalent by using the Equivalence and Implication Rule and constructing two

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P1.8.7 Prove that the compound propositions p^(q + r) and -(p + (q^-r)) are equivalent by using the Equivalence and Implication Rule and constructing two deductive sequence proofs

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