1 . 已知椭圆
,其离心率
是椭圆上两点,
为
的垂直平分线,交
轴于点
的中点为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd29b2e8192d673308bdf8d5cb6cab.png)
______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b7c4bc0486827728070752f15f4ee4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2d9dace92b5d916e294af0c2bfb9c30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23b4f86e48e2b0d63c1865c60ed1e4d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd29b2e8192d673308bdf8d5cb6cab.png)
您最近一年使用:0次
2 . 设点
,
,直线
,
相交于点M,且它们的斜率之积为k,对于结论:
①当
时,点M的轨迹方程为
;
②当
时,点M的轨迹方程为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8f3a64f2953b8bc7951a01f83fe1f83.png)
③当
时,点M的轨迹方程为
.
其中正确结论的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d71fb4d3db6c9922d3b605a6d40e529.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54fe2c124d5bbbbe666ee145cd454b6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b02f266bd253738e315e84231235f0d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a143573e9fe53e6a861154bf5b4c27c3.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91da74d94cf68a7d263b9ae5e594ea86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8f3a64f2953b8bc7951a01f83fe1f83.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a882037b9ce104ecc496e0f31a139361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a7df955fc17e92fd86302f8c34664a.png)
其中正确结论的个数为( )
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
2020-04-01更新
|
514次组卷
|
3卷引用:四川省成都市第七中学2018-2019学年高二上学期期中数学(理)试题