题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010734-24521.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010734-32415.png)
答案
解析
法一:(作差比较)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010734-11819.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010734-44694.png)
法二:(作商比较)①
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010735-89970.png)
②
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010735-43032.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010735-59623.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010734-44694.png)
法三:
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010736-26422.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010734-44694.png)
法四:(反证法)假设
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010736-99124.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010736-18227.png)
法五:(
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010736-22996.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010736-86275.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010737-57418.png)
当且仅当
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010734-44694.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010728-87932.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010728-89390.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010728-92009.png)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010728-67432.png)
(Ⅱ)在(Ⅰ)的条件下求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010728-88246.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010722-60280.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010723-61927.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010723-70287.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010723-17812.png)
A.8 | B.2 | C.![]() | D.4 |
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010718-92097.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010718-64729.png)
A.-3 | B.![]() | C.-5 | D.4 |
A.![]() | B.![]() |
C.y= sinx+![]() ![]() ![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010659-62134.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010700-82637.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010700-23595.png)
③
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010700-16508.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016010700-64868.png)
A.1 | B.2 | C.3 | D.4 |
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