题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185926-55070.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185926-72504.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185926-18645.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185926-94852.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185927-66865.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185927-54836.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185927-57927.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185927-30390.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185927-30607.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185928-65101.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185928-90337.png)
解析
试题分析:
解(1)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185928-69258.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185928-88629.png)
则
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185929-21993.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185929-59406.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185929-82363.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185929-26171.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185930-93703.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185930-54874.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185930-33310.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185930-66496.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185931-54133.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185931-64220.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185931-24574.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185931-98046.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185932-54267.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185931-64220.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185932-94101.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185932-96858.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185931-64220.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185932-78877.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185932-60916.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185928-90337.png)
点评:求一元二次不等式的解集,有时可用到根与系数的关系式:
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185933-47172.png)
(
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185933-33948.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185848-85127.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185848-26707.png)
(1)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185848-13787.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185848-36847.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185849-56148.png)
(2)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185849-98281.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185849-81751.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185849-75694.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185839-65149.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185840-58638.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185840-64456.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185840-17441.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185840-62527.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185814-26506.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185814-40323.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185815-33683.png)
①函数
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185815-44358.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185815-83780.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185815-56734.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185815-26920.png)
③若
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185815-56734.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185815-26920.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185816-50131.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185816-45496.png)
正确的是( )
A.②④ | B.③④ | C.①③ | D.①④ |
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185727-56081.png)
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185727-44454.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185727-46708.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185728-74891.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185728-79477.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185728-48088.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185729-38294.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185729-83505.png)
(3)数列
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185729-14760.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185729-27591.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185730-88766.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185730-56738.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185729-14760.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185730-86775.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185730-79148.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185711-32371.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204185712-20552.png)
A.2 | B.4 | C.![]() | D.0 |
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