题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022047-82632.png)
(1)试求
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022047-98164.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022047-14214.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022047-11870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022048-21165.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022048-21165.png)
解析
试题分析:(1)由已知x=1处有极小值-1,点(1,-1)在函数f(x)上,得方程组解之可得a、b.(2)由(1)得到f(x)=x3-x2-x,
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022048-70219.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022048-21165.png)
(1)对函数求导得
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022048-90566.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022048-98348.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022048-20419.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022047-11870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022048-70219.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022048-21165.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022048-70219.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022048-21165.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022048-70219.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022048-21165.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022048-21165.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022048-21165.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022040-56875.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022041-75159.png)
(1)是否存在实数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022041-82343.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022041-15164.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022041-72785.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022041-82343.png)
(2)若a<0,且函数y=f(x)的极小值为
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022042-11217.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022025-10092.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022025-20580.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018022026-45690.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018021956-72731.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018021957-20290.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018021957-42389.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018021941-67502.png)
(1)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018021941-95908.png)
(2)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018021942-93314.png)
(3)若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018021942-98653.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018021942-57727.png)
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