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化简x-1分之x的平方+1-x分之1
同上,
人气:172 ℃ 时间:2019-12-21 18:19:02
解答

x²/(x-1)+1/(1-x)
=x²/(x-1)-1/(x-1)
=(x²-1)/(x-1)
=(x-1)(x+1)/(x-1)
=x+1
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