题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030208-15065.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030209-99872.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030208-15065.png)
(1)求函数y=f(x)的表达式;
(2)若x∈[-1,1]时,不等式
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030209-24696.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030209-41163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030209-41163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030209-41163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030209-40478.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030210-27949.png)
(2)m≤-1或m≥
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030210-78163.png)
解析
则
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030210-78782.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030210-79634.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030210-25845.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030210-27949.png)
(2)原不等式可化为ln(x
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030209-41163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030209-24696.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030209-41163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030209-41163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030209-40478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030210-78163.png)
函数y=ln(x
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030209-41163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030209-24696.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030209-41163.png)
所以当x=0时函数y=ln(x
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030209-41163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030209-24696.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030209-41163.png)
则只需-m
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030209-41163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030209-40478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030210-78163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030210-78163.png)
核心考点
试题【(本小题满分12分)已知A(1,f′(1))是函数y=f(x)的导函数图像上的一点,点B的坐标为(x,㏑(x+1)),向量=(1,1),设f(x)=·(1)求函】;主要考察你对函数极值与最值等知识点的理解。[详细]
举一反三
已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030200-91101.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030200-82013.gif)
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030200-14851.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030200-91914.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030200-81422.gif)
(2)当函数
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030200-91914.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030200-90605.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030200-47338.gif)
(3)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030200-91914.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030151-99962.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030152-37892.png)
A.![]() | B.![]() | C.![]() | D.![]() |
(本小题满分14分)
设函数
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030143-68890.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030144-52901.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030144-88864.gif)
(1)求a、b的值;
(2)若对于任意的
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030144-43395.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030144-52211.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030132-25050.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030133-96541.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030133-82783.png)
A.![]() | B.![]() | C.![]() | D.![]() ![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030124-37579.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019030125-27792.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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