名校
解题方法
1 . 给出定义:设
是函数
的导函数,
是函数
的导函数,若方程
有实数解
,则称
)为函数
的“拐点”.
(1)经研究发现所有的三次函数
都有“拐点”,且该“拐点”也是函数
的图象的对称中心.已知函数
的图象的对称中心为
,讨论函数
的单调性并求极值.
(2)已知函数
,其中
.
(i)求
的拐点;
(ii)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b04824a308519a61318a82aa97a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aac282e92da3691942a6ba8511de2303.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b04824a308519a61318a82aa97a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc581690f1d82133bb5fed3d7f365f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11abb76da45ffa52b47c3a6b9a03ac7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/408b5fe83aaebc38dad12ce4078e92e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
(1)经研究发现所有的三次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75044e0301ef9def5c1a1c8e6f2cba77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc8cd0533cd510418a9e367d2045ed2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da77290fb789fc7addf96dcc72a3f851.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52f18b54d3f22c0f4cf5d5ce0a968c1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
(i)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(ii)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd9ce9991b7db23119c4edac0dc42afa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a8695cb53f51d16e2c0adbdfe029a2.png)
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2024-02-21更新
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616次组卷
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3卷引用:云南师范大学附属中学2023-2024学年高二下学期开学考试数学试卷