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x-1/x+2-(x-1)/(x平方-4)=1-3/2-x
人气:453 ℃ 时间:2020-01-28 00:06:28
解答
通分,(x-1)(x+2)/(x^-4)-(x-1)/(x^2-4)=2/(x-2)
3(x-1)/(x^2-4)-2(x+2)/(x^2-4)=0
(x+1)/(x^2-4)=0
x=-1
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