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A中,(1)若x=0,則xy=0,不符合元素互异性(2)若xy=0,則x=0,或y=0,x=0(1)已說明,不可取;若y=0,則x-y=x,不符合元素互异性所以,只有x-y=0合適,得x=y,囙此A={x,x^2,0} B={0,|x|,x}由B可以看出除0外,另外兩元素必…
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