名校
1 . 已知函数
.
(1)当
,
取一切非负实数时,若
,求
的范围;
(2)若函数
存在极大值
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeef0a1fc29fdce3545535b56de8027c.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0ffecb03c47be920254c4ccffa5b222.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ccb87e515cc46e3086d48d9f5792836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b3ae7e5228fd1acb0d46f6941143a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b3ae7e5228fd1acb0d46f6941143a7.png)
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2017-05-02更新
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434次组卷
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4卷引用:第十四届高二试题(A卷)-“枫叶新希望杯”全国数学大赛真题解析(高中版)