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[函数] 请教大家:2018浙江高考22题第二问是否有问题?

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走走看看 posted 2018-9-10 10:24 |Read mode
见附件。
请大家指教!
$type 2018浙江高考数学第22题.gsp (3.6 KB, Downloads: 3286)

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kuing posted 2018-9-10 14:15
零点在很远的地方。
要知道 `f` 是先下凸后上凸的。
see also: forum.php?mod=viewthread&tid=5398
分析问题不能只看图,不能只看眼前,要对函数进行分析,看看各项的增减、阶、凹凸等等来认识它。

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original poster 走走看看 posted 2018-9-18 11:04
谢谢指点!

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