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战巡 发表于 2022-5-31 16:40 啥极值定理? $\frac{1}{x-3}$哪有极值啊?
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baxiannv 发表于 2022-5-31 05:46 1/(x-3)在[-2,2]能使用极值定理吗?在这个区间不连续,但是为什么好像可以用?!
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2025-7-15 14:43 GMT+8
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