点
与定点
的距离和它到直线
的距离的比是常数
,求点M的轨迹.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d259822ab64b8626f3893b8432673358.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092fd1b1d33979818300cd2e3699bff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/495bb3e5a3a9d35f5c9f0cf1f5d51876.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
23-24高二上·全国·课后作业 查看更多[4]
(已下线)3.4 曲线与方程湘教版(2019)选择性必修第一册课本例题3.4 曲线与方程(已下线)3.1.1 椭圆的标准方程(3)(已下线)第01讲 3.1椭圆(12大题型训练,含焦点三角形、离心率等题)-【练透核心考点】2023-2024学年高二数学上学期重点题型方法与技巧(人教A版2019选择性必修第一册)
更新时间:2023-09-11 18:45:40
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【知识点】 轨迹问题——椭圆
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】在平面直角坐标系xOy中,曲线C上的点
到点
的距离与它到直线
的距离之比为
,圆O的方程为
,曲线C与x轴的正半轴的交点为A,过原点O且异于坐标轴的直线与曲线C交于B,C两点,直线AB与圆O的另一交点为P,直线PD与圆O的另一交点为Q,其中
,设直线AB,AC的斜率分别为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44f67daeddff2e805bf34d43e629d959.png)
;
(1)求曲线C的方程,并证明
到点M的距离
;
(2)求
的值;
(3)记直线PQ,BC的斜率分别为
、
,是否存在常数
,使得
?若存在,求
的值,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a2bd33d6b5eafe9eaa30d9d2b8f30b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892077030df22daf504ba9c0409ce384.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb02410b1d0282c55d4c323c852853b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65015b8835405afa8ca82127ee55d49c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44f67daeddff2e805bf34d43e629d959.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
(1)求曲线C的方程,并证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a2bd33d6b5eafe9eaa30d9d2b8f30b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2311721e4e555aaec8411e6a56796342.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4757181824e15e0f21e5bdd55448783.png)
(3)记直线PQ,BC的斜率分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6652d2342b9e97385ef10fcb71db3c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28e12d4e98345c00e7daf3168eeeb1ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebb20cd08acb3dc9c8b7805d31af8d2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】已知椭圆
的焦点在
轴上,一个顶点为
,其右焦点到直线
的距离为3.
(1)求椭圆
的方程;
(2)设椭圆
的长轴为
,
为椭圆上除
外任意一点,引
,
和
的交点为
,求点
的轨迹方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/122cf7a2f27fadf126b282fb1b3e1533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8948ec2093ccaa531680e0aec5d063e6.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(2)设椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99425fa11a758408bcd082132a34704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f5dc1a58e0b8377d5549c7c6deba67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc74dfd613d7f55e8686c5cfd7e915a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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