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1-(x-3)/(x-1)怎样变成2/(x-3)?
人气:136 ℃ 时间:2020-10-02 03:43:29
解答
不可能啊
1-(x-3)/(x-1)=[(x-1)/(x-1)]-[(x-3)/(x-1)]
=[(x-1))-(x-3)]/(x-1)
=2/(x-1)
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