已知1
问题描述：
已知1
数学人气：270 ℃时间：2020-06-28 06:13:56
优质解答
=-(2-x)/(x-2)+(x-1)/(x-1)x/x
=0=-(2-x)/(x-2)+(x-1)/(x-1)+x/x =-1+1+1＝1
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答
=-(2-x)/(x-2)+(x-1)/(x-1)x/x
=0=-(2-x)/(x-2)+(x-1)/(x-1)+x/x =-1+1+1＝1