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Mathematics, 25.04.2021 14:00 kookycookiefanx

9. Let P = {1,3,5,7) Q = {3, 7, 9, 11} R = {1, 5, 8, 11}, then verify the following.
(a) PUQ = QUP
(b) (P UQ) UR = PU (QUR)
(c) PnQ = QnP

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9. Let P = {1,3,5,7) Q = {3, 7, 9, 11} R = {1, 5, 8, 11}, then verify the following.
(a) PUQ...
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