已知抛物线
:
的焦点为
,准线为
,
为
上一点,
的延长线交抛物线于点
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e639c69b32fc7ea707f01af7c9751d.png)
___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88b59a1a4a4920f2b2dbb0f336419abc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e639c69b32fc7ea707f01af7c9751d.png)
更新时间:2021-02-05 11:46:07
|
【知识点】 抛物线定义的理解
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【推荐1】已知抛物线E:
的焦点为
,过点
的直线
与抛物线交于
两点,与准线交于
点,
为
的中点,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
__________ .
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您最近一年使用:0次
【推荐2】已知抛物线
:
的焦点为
准线为
为
上一点
垂直
于点
分别为
的中点
与
轴相交于点
若
,则
等于__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f633bfc076ff83539533cc15f703edec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b657ce0a5ec36cc1f28db5fa41794c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9cfd9a8561379859c8925442fdde7a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ceb838b872cd3083e3067eaeabc838de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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您最近一年使用:0次