已知直线l过点
且垂直于x轴.l被抛物线
(
)截得的线段长为4,则抛物线的焦点坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a948d2f7732d7f03e986c63712089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac431deeb800ffbdc154eec9c08a8db0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5abd313d4e92a762fb7fb0c1cb65263d.png)
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22-23高三上·北京·阶段练习 查看更多[2]
北京专家信息卷(全国甲卷)2023届高三上学期12月月考数学(理)试题(4)(已下线)3.3.2 抛物线的简单几何性质(第2课时)(导学案)-【上好课】高二数学同步备课系列(人教A版2019选择性必修第一册)
更新时间:2022-12-29 16:33:14
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【推荐1】已知抛物线
:
恰好经过圆
:
的圆心,则抛物线
的焦点坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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【推荐2】已知角
的终边经过点
,若点A在抛物线
的准线上,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3fc92036d6c20457e0d903aad09add0.png)
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【推荐1】设抛物线
的焦点为
,准线为
.斜率为
的直线经过焦点
,交抛物线
于点
,交准线
于点
(
在
轴的两侧).若
,则抛物线的方程为( )
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【推荐2】已知过原点
的直线与抛物线
:
的一个交点为
(
与
不重合),过抛物线
的焦点
作平行于
的直线,与抛物线
交于点
,
,若
,则点
的坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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