题目
题型:单选题难度:简单来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010100-75925.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010100-62268.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010101-17572.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010101-21092.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010102-68731.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010100-75925.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010100-62268.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010102-74719.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010100-75925.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010102-74719.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010103-48254.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010103-72596.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010102-68731.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010100-75925.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010101-17572.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010102-74719.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010103-48254.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010103-39366.png)
则函数
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010103-48254.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010103-47145.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010103-35998.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010104-88385.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010104-72508.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010104-50779.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010104-84738.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010104-29213.png)
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010104-88385.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010101-21092.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010105-71674.png)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010104-50779.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010101-21092.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010105-15270.png)
(3)当
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010104-84738.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010101-21092.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010105-98599.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010105-75943.png)
综上:不等式
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010101-21092.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010102-69280.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010056-57684.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010056-25033.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010056-35015.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010057-26776.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010053-10569.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010054-97919.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010054-71511.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010054-35115.png)
则集合
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010054-80564.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010052-36864.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010052-20061.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010052-36864.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010050-69146.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010051-66833.png)
A. 2 | B. 3 | C. 4 | D. 5 |
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010045-64474.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010046-74159.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010046-46526.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010046-38399.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010045-64474.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190818/20190818010046-34603.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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