13-14高二下·上海金山·期末
1 . 已知椭圆
上存在两点
、
关于直线
对称,求
的取值范围.
![](https://img.xkw.com/dksih/QBM/2014/10/8/1571870225850368/1571870231674880/STEM/d3036871be934fe99ea8abc2e15f186d.png)
![](https://img.xkw.com/dksih/QBM/2014/10/8/1571870225850368/1571870231674880/STEM/169267512b464181bd3cff2153f96f23.png)
![](https://img.xkw.com/dksih/QBM/2014/10/8/1571870225850368/1571870231674880/STEM/2704a4ac251049bbaaf04c71f7eec938.png)
![](https://img.xkw.com/dksih/QBM/2014/10/8/1571870225850368/1571870231674880/STEM/30c18fe3f9ad46d2a9b3a2e36fad1584.png)
![](https://img.xkw.com/dksih/QBM/2014/10/8/1571870225850368/1571870231674880/STEM/41592cd172ed408183b4e4683c513171.png)
您最近一年使用:0次
2 . 已知椭圆
:
(
)过点
,其左、右焦点分别为
,且
.
(1)求椭圆
的方程;
(2)若
是直线
上的两个动点,且
,则以
为直径的圆
是否过定点?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9374d3462754e846cbb0f7dd5fd28277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/458a7f939a9981cee6ea39457e8225b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0537310668ef1324c28c6267e41ad57c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f68d02eec6bab17add95d6c2b402913c.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da322ac8867e8a47c6588601078abf18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e6f6c3490d0f69a7e67168976e78ac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次