题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211104-34016.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211104-62084.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211104-99933.jpg)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211104-85837.gif)
(2)若不等式
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211104-32910.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211105-20966.gif)
答案
答案:(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211105-21876.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211105-38506.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211106-89139.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211106-83156.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211112-95531.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211112-35464.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211112-69523.gif)
………6分
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211113-14807.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211113-18336.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211113-33698.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211113-82394.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211114-20640.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211114-19180.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211114-75604.gif)
而
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211114-74860.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211115-83654.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211115-54264.gif)
又x=1时,f(x)取极小值为
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211115-32435.gif)
故
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211115-25487.gif)
由题意得
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211116-27546.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211116-88967.gif)
解析
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211042-91739.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211042-33088.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211011-89109.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211009-22368.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211009-45627.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211006-53975.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017211006-64765.gif)
已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017210926-19458.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017210926-23263.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017210926-20272.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017210926-87358.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017210926-87358.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017210927-38215.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017210927-45674.gif)
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