解题方法
1 . 已知抛物线
的焦点为
,过点
的直线
交抛物线于两点
,交抛物线的准线于点
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f2543bed90100ddae314d492e792b2.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f96a2e30d00b58259bbf45b69118c056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655b6a742dbacdab5aaa298007663dd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655b6a742dbacdab5aaa298007663dd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a159de0b2d9eb1ae0b7e664e64d3c6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e4e4c7a79d9d3cdb9ac5949d53e33e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28981f38a7eb81aa6337495e417c31ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f2543bed90100ddae314d492e792b2.png)
您最近一年使用:0次
名校
解题方法
2 . 过抛物线
的焦点作一条直线交抛物线于
,
两点,若线段
的中点
的横坐标为2,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d103d683d2fd06b6fa9ec5523c2ea0c9.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d103d683d2fd06b6fa9ec5523c2ea0c9.png)
您最近一年使用:0次
2017-11-27更新
|
1565次组卷
|
6卷引用:2016届青海省平安一中高三4月月考文科数学试卷