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计算(分式):(x^2-1)(1/1+x-1/x-1-1)
人气:195 ℃ 时间:2020-05-13 13:56:31
解答
(x^2-1)(1/1+x-1/x-1-1)
=(x-1)(x+1)(1/1+x-1/x-1-1)
=(x-1)-(x+1)-(x-1)(x+1)
=-2-(x平方-1)
=-x平方-1
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