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x²/x-1+x/1-x怎么化简
人气:238 ℃ 时间:2020-05-22 01:49:23
解答
x²/x-1+x/1-x
=x²/x-1-x/x-1
=(x²-x)/(x-1)
=x(x-1)/(x-1)
=x
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