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数学
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化简 (1/2)a+(1-a)+(a^2 -1)/(a-1)
人气:426 ℃ 时间:2020-04-07 22:13:34
解答
(1/2)a+(1-a)+(a^2 -1)/(a-1)
=1/2a+1-a+a+1
=1/2a+2
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