已知抛物线
上一点
到焦点的距离是6,则其准线方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fbe5e2918d2ce11efeb6c59d0c68df9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2024-05-21 14:51:29
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【知识点】 抛物线上的点到定点的距离及最值
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单选题
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较易
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【推荐1】若抛物线
上一点
到拋物线焦点的距离为
,则点
到原点的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b072ff6d1b83232bebd7d4709ffba4ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
A.![]() | B.1 | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐2】如图,M是抛物线
上一点,F是抛物线的焦点,以Fx为始边、FM为终边的角
则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/4c85eb3e-5227-468e-ac4e-b59fc667c4d1.png?resizew=115)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac8d134f375dbe48a9d3645b5b178ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ad97d7049f4c09ea65be3501c72416.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4336e7f5e08ecc2bb42694e9fb09970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/4c85eb3e-5227-468e-ac4e-b59fc667c4d1.png?resizew=115)
A.![]() | B.![]() | C.3 | D.4 |
您最近一年使用:0次