(2011•津南区一模)若x=3,则x(x−1)2−1(x−1)2的值为[1/2][1/2].
1个回答
原式=[x−1
(x−1)2=
1/x−1],
当x=3时,原式=[1/3−1]=[1/2].
故答案为:[1/2].
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