1 . 抛物线
上一点
到焦点
的距离为6,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7775aa57ca0e62216f3039ed88dceed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd29b2e8192d673308bdf8d5cb6cab.png)
A.3 | B.4 | C.5 | D.6 |
您最近一年使用:0次
2021-08-02更新
|
112次组卷
|
2卷引用:四川省南充高级中学2023-2024学年高二下学期4月期中考试数学试题
解题方法
2 . 已知点
为抛物线
上的动点,点
在
轴上的射影为
,点
的坐标是
,则
的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2016/1/20/1572448671006720/1572448676970496/STEM/4cbe21fcac614cdfba81549e742377ae.png?resizew=59)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://img.xkw.com/dksih/QBM/2016/1/20/1572448671006720/1572448676970496/STEM/d08b088180ea4a9cab974bafb276e7ff.png?resizew=47)
![](https://img.xkw.com/dksih/QBM/2016/1/20/1572448671006720/1572448676970496/STEM/0d3eaf38dea04547b277164f393ccef3.png?resizew=75)
A.8 | B.![]() | C.10 | D.![]() |
您最近一年使用:0次
3 . 在平面直角坐标系
中,已知抛物线
上一点
到焦点的距离为3,则点
的横坐标是____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
名校
解题方法
4 . 已知抛物线
的焦点为F,O为坐标原点,点
在抛物线
上,若
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc7ad3432ac96b0a38beaa7f2edc3499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22962a2ad892cb6b14ab039a06e8cdc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d0431fffc934ec358a6a6abba25c01.png)
A.![]() ![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次