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一道七年级分式加减题
(x+1-1/1-x)÷(x-x2/x-1)
人气:145 ℃ 时间:2020-06-20 12:14:39
解答
原式=[(x+1)+1/(x-1)]÷[-(x²-x)/(x-1)]
=[(x²-1+1)/(x-1)]÷[-x(x-1)/(x-1)]
=[x²/(x-1)]÷(-x)
=-x/(x-1)
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