名校
解题方法
1 . 已知函数
,其中
.
(1)设
是
的导函数,求函数
的极值;
(2)是否存在常数
,使得
时,
恒成立,且
有唯一解,若存在,求出
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75418c83cd240e76a4ae30937b5cf730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae018fde08edf0539089f98c17e11ff7.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd330acca8e17f5ff9aca1f0f312df50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd330acca8e17f5ff9aca1f0f312df50.png)
(2)是否存在常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11b481c660bea0673fdd7b31679cab53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d64b4bc6b36bcb879824031ba4902c5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7add49a49ed66fa00cbb2f73622a6a39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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