1 . 离心率为
的椭圆
恰好过抛物线
的焦点
,
为椭圆的上顶点,
为直线
上一动点,点
关于直线
的对称点为
,则
的最小值为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/290a56449ad6dd65aec7525c94273f59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82358b724051b032c7ec734a226ae84.png)
您最近一年使用:0次
2 . 已知实数
构成一个等比数列,则圆锥曲线
的焦距为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f4789f48ee309f13afb84c18b181f48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfda0696f276fff4177533f8c63e349.png)
您最近一年使用:0次
2017-04-27更新
|
935次组卷
|
2卷引用:广东省潮州市2017届高三第二次模拟考试数学(理)试题
3 . 已知实数
构成一个等差数列,则圆锥曲线
的焦距为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35bafd58bd6c3625f61acf03c59e40a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfda0696f276fff4177533f8c63e349.png)
您最近一年使用:0次