解题方法
1 . 已知抛物线
,过点
的直线l与抛物线C交于A,B两点,O为坐标原点.
(1)若
,求
外接圆的方程;
(2)若点A关于x轴的对称点是
(
与B不重合),证明:直线
经过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa2c731aaa4005382d5b4324e29fbb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/529b4836786aca156de325464ea2ecd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
(2)若点A关于x轴的对称点是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
您最近一年使用:0次
2021-02-02更新
|
186次组卷
|
3卷引用:宁夏中卫市2021届高三高考第一次优秀生联考数学(文)试题