题目
题型:单选题难度:简单来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818053543-67191.png)
A.y=-x![]() | B.y= x![]() | C.y=![]() | D.y=log![]() ![]() |
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818053543-41689.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818053543-67191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818053543-67191.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818053538-91583.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818053539-63599.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818053539-29437.png)
(1)求x的取值范围;
(2)求函数f(x)= log
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818053539-63599.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818053539-78723.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818053539-31569.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818053534-56953.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818053535-12054.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818053535-31692.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818053535-43513.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818053535-91524.png)
(2)求不等式
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818053535-40374.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818053531-72772.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818053531-31413.png)
(1)当a=-1时,判断并证明函数的单调性并求f(x)的最小值;
(2)若对任意x
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818053531-31413.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818053528-33926.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818053525-73458.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818053525-90744.png)
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