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3. (15 pts) Let P be the proposition Today is Friday and let Q be the proposition We have an exam today. Write in words

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3. (15 pts) Let P be the proposition Today is Friday" and let Q be the proposition We have an exam today. Write in words the meaning of the following propositions: (a) P-Q (b) PAQ ()(Q)-(P) Express the following statements using symbols from propositional logic: (d) Today is Friday or we do not have an exam today. (e) "If today is not Friday then we do not have an exam today

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