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13) (8 pts) Prove the second of De Morgan's Laws holds by showing that if A and B are sets, then A U B =

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13) (8 pts) Prove the second of De Morgan's Laws holds by showing that if A and B are sets, then A U B = A n B by showing that each side is a subset of the other. 14) (6 pts) without using a truth table, show that ~ ( p V (( ~p ) q) ) ("PJA (~q)

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