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[函数] 含参函数极值点范围

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力工 posted 2023-7-22 22:31 |Read mode
遇到一道题,大家帮忙瞅瞅,怎么解?
已知$x=0$是函数$f(x)=(sin\sqrt{a}x)^2-ax^2cosx$的极大值点,求$a$的范围。

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kuing posted 2023-7-22 22:43

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original poster 力工 posted 2023-7-23 16:08
感觉做起来太夶太变态,㹜好复杂。

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kuing posted 2023-7-23 16:54
力工 发表于 2023-7-23 16:08
感觉做起来太夶太变态,㹜好复杂。
夶?㹜?啥意思😅

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original poster 力工 posted 2023-7-23 20:16
kuing 发表于 2023-7-23 16:54
夶?㹜?啥意思😅
地方话,相当于程度副词,指比“很、十分、非常”还“很”等等吧》

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