题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092522-12046.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092522-13108.png)
A.![]() | B.(2,0) | C.(4,0) | D.![]() |
答案
解析
试题分析:画出如下示意图,可知,抛物线
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092523-34429.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092523-97951.jpg)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092518-19661.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092518-12293.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092518-19661.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092519-32510.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092518-19661.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092509-47046.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092510-30572.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092510-23200.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092510-25558.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092501-94457.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092501-30973.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092501-53662.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092501-50359.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092502-58303.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092502-48685.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092501-50359.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092450-20473.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092450-71920.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092450-60874.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092450-33033.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092450-95433.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092450-33033.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092451-87388.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092451-46240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092450-95433.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092451-87388.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092451-84084.png)
(1)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092451-63843.png)
(2)过原点
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092450-60874.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092452-61218.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092450-33033.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092450-95433.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092451-87388.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092452-53009.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092452-20136.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092452-54265.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092453-87887.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092453-27350.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092453-30068.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092453-49252.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092432-70891.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092432-41847.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092432-41245.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092432-20726.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092432-41847.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092432-26274.png)
(1)求轨迹为
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092432-26274.png)
(2)设斜率为
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092432-38741.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092433-36609.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092433-41454.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092433-36609.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092432-26274.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024092432-38741.png)
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