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Propositional Logic 4) Let U = {A1, A2, , An} be a set of formulas. Prove that U A if and only if (AA )A

Propositional Logic

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4) Let U = {A1, A2, , An} be a set of formulas. Prove that U A if and only if (AA )A (that is the big wedge symbol, and means (Al . . . An))

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