题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013935-46240.png)
(1)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013935-64780.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013936-32126.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013935-64780.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013936-35589.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013936-86628.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013936-56186.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013937-17012.png)
解析
(1)由已知可以求得
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013937-25789.png)
![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
![]() | ↘ | 极小值 | ↗ | 极大值 | ↘ | 极小值 | ↗ |
故
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013935-64780.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013936-56186.png)
(2)存在
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013935-64780.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013936-35589.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013939-30401.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013940-36127.png)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013940-82593.png)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013940-72262.png)
令
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013940-23728.png)
因为
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013940-38156.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013941-92860.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013941-98139.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013941-19963.png)
故
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013941-34356.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013942-87951.png)
故实数
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013936-86628.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013937-17012.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013931-49360.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013931-11596.png)
(1)求a的值;
(2)求曲线y=f(x)在点(1,f(1))处的切线方程
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013925-48685.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013925-55602.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013925-32091.png)
A.-2或2 | B.-9或3 | C.-1或1 | D.-3或1 |
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013913-70438.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013913-33981.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013913-96237.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013914-57545.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013914-33247.png)
(2)设函数
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013914-62129.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013914-52046.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013914-76269.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013915-63191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013915-60764.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013905-76488.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013857-17128.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019013857-70992.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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