题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204204055-55622.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204204056-51849.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204204056-31671.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
试题分析:令2x-1=3,则x=2,所以,
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204204056-31671.png)
点评:简单题,已知
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204204058-84786.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204204000-52859.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204204000-58765.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204204001-55794.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203937-95486.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203937-98096.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203820-85721.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203820-11909.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203820-90306.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203820-93920.png)
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203820-85721.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203821-80044.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203820-85721.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203821-20307.png)
(3)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203821-63276.png)
(4)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203820-85721.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203821-27723.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203806-18757.png)
(1)判断
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203807-68653.png)
(2)用定义法证明
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203807-68653.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203807-12748.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203739-45307.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203740-26866.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203740-47483.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203741-83918.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203739-45307.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203740-26866.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203741-65122.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203742-53216.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203742-76723.png)
(2)判断
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203742-11438.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203743-79306.png)
(3)若
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203743-24553.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203744-98764.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204203744-28011.png)
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