抛物线
的焦点为
,准线为
,点
是抛物线上一点,且
(
为坐标原点),
,垂足为
,则
的面积是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5fa5dc69a1232f2a88629a71c8f1367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c97d2110db5fc9cd9971a63cadcf87.png)
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22-23高二·江苏·假期作业 查看更多[3]
(已下线)第15讲 抛物线的几何性质-【暑假自学课】2023年新高二数学暑假精品课(苏教版2019选择性必修第一册)(已下线)2.3.2抛物线的简单几何性质(分层练习)-2023-2024学年高二数学同步精品课堂(北师大版2019选择性必修第一册)(已下线)3.3.2 抛物线的几何性质(3)
更新时间:2023-08-20 01:14:12
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解题方法
【推荐1】已知
是抛物线
:
的焦点,
是
上一点,
的延长线交
轴正半轴于点
.若
为
的中点,则以
为直径的圆的标准方程为______ .
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【推荐2】抛物线
上任意一点P到点
的距离的最小值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5db63cef6d8bbb08137d71c6f7b6e741.png)
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解题方法
【推荐1】过抛物线
的焦点
作斜率为
的直线
,与该抛物线交于
,
两点,若
的面积等于
(
为坐标原点),则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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【推荐2】已知
为坐标原点,抛物线
的焦点为
为
上一点且位于第一象限,
与
抽垂直,垂足为
,若
,则
的面积为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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