11-12高二下·福建龙岩·阶段练习
名校
1 . 已知点A
和B
,动点C到A、B两点的距离之差的绝对值为2,点C的轨迹与经过点(2,0)且倾斜角为
的直线交于D、E两点
(1)求点C的轨迹方程;
(2)求线段DE的长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f77239a3691bdce606b66ed398b4b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b26d1b84ffffb01daebfd1a425fc16ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aa42b56b1c92689a080b58cb603a642.png)
(1)求点C的轨迹方程;
(2)求线段DE的长
您最近一年使用:0次
2016-12-01更新
|
2338次组卷
|
3卷引用:2011-2012学年福建省永定一中高二下学期第一次阶段考数学文科试卷
(已下线)2011-2012学年福建省永定一中高二下学期第一次阶段考数学文科试卷甘肃省民勤县第一中学2021-2022学年高二上学期第二次月考数学(文)试题新疆喀什地区2023-2024学年高二上学期期末考试数学试题
2011·甘肃武威·二模
解题方法
2 . 已知
,
是
,
轴正方向的单位向量,设
,
且满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4af493132a1d76645e826fd4c732b0.png)
(1)求点
的轨迹
的方程.
(2)若直线
过点
且法向量为
,直线与轨迹
交于
,
两点.点
,无论直线
绕点
怎样转动,
是否为定值?如果是,求出定值;如果不是,请说明理由.并求实数
的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f054a36f990c595a8093a92558646e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f33ee2dfbdb7101880df4f245c80dfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d8fbac4fee92272c41f96d482082376.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ed4c42f440d751a71e02a6f0e01d182.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4af493132a1d76645e826fd4c732b0.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16fd15503ee692f8286b0312f7c6f0cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a06f1133c433bc599a5a714cea55ded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1cf8af6e62058cc4e2d83d5da7f4c68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62347c54707c6874115c08aa5062b1d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次