名校
1 . 双纽线也称伯努利双纽线,是指定线段
长度为
,动点
满足
,那么
的轨迹称为双纽线.已知曲线
为双纽线,下列选项判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/878e89b6eca35e34c863e832a2c661db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb27c30e284fae7967df5975eb3287e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2470acfa076afe5a987508b0f3344b8d.png)
A.曲线![]() ![]() |
B.曲线![]() ![]() |
C.曲线![]() ![]() |
D.![]() ![]() ![]() ![]() ![]() ![]() |
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A.曲线![]() ![]() |
B.曲线![]() ![]() |
C.曲线![]() ![]() |
D.![]() ![]() ![]() ![]() ![]() ![]() |