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Tesla35 发表于 2022-5-28 23:20 $(x-1)^2(x-4)$在$x=1$两侧不变号,在$x=4$两侧变号
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baxiannv 发表于 2022-5-28 15:25 两侧趋近于一个数,那个值一定重复?
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