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1.1-46 (15 points) Prove that AB (A B), is a tautology. Explain why this make sense. 1.1-48 (15 points) Show that every compound wff is

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1.1-46 (15 points) Prove that AB (A B), is a tautology. Explain why this make sense. 1.1-48 (15 points) Show that every compound wff is equivalent to a wff using only the connectives of V and . (Hint: See Exercise 47)

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