名校
1 . 已知直线l被圆C:
所截的弦长不小于2,则下列曲线中与直线l一定有公共点的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d61985901c2bc698d72ac88f4e1eb65.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2 . 已知椭圆
:
过点
,且一个焦点坐标为
.
(Ⅰ)求椭圆
的方程及离心率;
(Ⅱ)过点
且与x轴不垂直的直线
与椭圆C交于
两点,若在线段
上存在点
,使得以MP, MQ为邻边的平行四边形是菱形,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790e0e443be1c321043c4297cd32746d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246ccaf046d1e27d16ca69c75db289da.png)
(Ⅰ)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/990f17f6edbe73e6cda2392350036645.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ddb0f36bc67007917831a659a60be8a.png)
您最近一年使用:0次