1 . 新定义:如图,
与直线a相离,过圆心I作直线a的垂线,垂足为H,交
于P,Q两点(Q在P,H之间),我们把点Q称为
关于直线a的“近点”,把
的值称为
关于直线a的“秘钥数”.根据新定义解决问题:在平面直角坐标系xOy中,直线l经过点
,点F是坐标平面内一点,以F为圆心,1为半径作
.若
与直线l相离,点
是
关于直线l的“近点”,且
关于直线l的“秘钥数”是6,则直线l的表达式为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79516f18a7daf0ad467a48e16d0e65f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79516f18a7daf0ad467a48e16d0e65f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79516f18a7daf0ad467a48e16d0e65f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcb07eb9cef85e75a15581115f6daf80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79516f18a7daf0ad467a48e16d0e65f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f739a29d4fbb88ba1337e8456ef1f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/989dc4af481c6133824200942b9e5c8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/989dc4af481c6133824200942b9e5c8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e258dc5c8b4ea30bca80a56098065402.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/989dc4af481c6133824200942b9e5c8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/989dc4af481c6133824200942b9e5c8d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/23/f7d5b01e-8cec-4702-9410-3d26d4568b10.png?resizew=156)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2023-09-22更新
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2卷引用:陕西省咸阳市2023-2024学年高二上学期期末教学质量检测数学试题