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根据 f’(x)=$(x-c)^2h(x)$, 则 f''(x) = $(x-c)^2h'(x)+2(x-c)h(x)$ ,这个f''(c)不肯定是0啊 nttz 发表于 2022-5-2 03:54
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2025-6-4 21:19 GMT+8
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