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Kalau yg Q adalah (1,3,5,7,9)
Q={1,3,5,7,9}
a) P-Q={1,2,3,4,5} - {1,3,5,7,9}
={1,2,4}
b)Q-P={1,3,5,7,9} - {1,2,3,4,5}
={7,9}