解题方法
1 . 若曲线
,且
经过
这三点中的两点,则曲线
的离心率可能为___________ .(写出一个即可).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7e0dabe0f686f90389634884059c748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb4e301bb40ce2f30a10cd44ddb5a95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/551a0fb5987e18870ae41f92b2865fba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
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解题方法
2 . 已知椭圆
过点
,且其中一个焦点的坐标为
.
(1)求椭圆
的方程;
(2)若经过
的直线
(与
轴不重合)与椭圆交于
两点,在
轴上是否存在点
使得
为定值?若存在,求出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd40fadf77c01c856c9e5848c4215fa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2de52259b426acb42761fec59a7748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e1a85a657231ef717809d5a839ad9c.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)若经过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eae240187e2691bccbf8e2051b22963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
2020-02-22更新
|
307次组卷
|
2卷引用:2020届湖南省长沙市第一中学高三第二次月考数学(文)试题