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数学
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3/(x-1)²-3x/(x-1)² 计算
人气:129 ℃ 时间:2020-03-27 01:51:27
解答
3/(x-1)²-3x/(x-1)²
=(3-3x)/(x-1)²
=3(1-x)/(1-x)²
=3/(1-x)
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