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x2-3x+2>0 (x-2)(x-1)>0 x<1或x>2 7-x/x-3 -1>0 通分 7-x-x+3/x-3>0 2x-10/x-3<o (2x-10)(x-3)<0 3<x<5 (x-13)方>0 x不等於13 x<13或x>13
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