解题方法
1 . 已知
,
,椭圆
经过点
且焦距为
.
![](https://img.xkw.com/dksih/QBM/2021/2/25/2665851876081664/2671194728644608/STEM/c1295fa1582c4cf0a3eacdeca452066a.png?resizew=266)
(1)求椭圆
的方程;
(2)过椭圆
的右焦点的直线
与椭圆
交于
两点, 求
的最小值;
(3)如图是椭圆
旋转一定角度的图形,请写出一种尺规作图方案以确定其对称中心的位置,并在答卷的图中画出来.(不必说明理由).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638a3af9e85b3d09a9d5cd2baec6b4a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3af02baf8698283da1642be10139742.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://img.xkw.com/dksih/QBM/2021/2/25/2665851876081664/2671194728644608/STEM/c1295fa1582c4cf0a3eacdeca452066a.png?resizew=266)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8942b38cbf60752297e56284b5f29a0.png)
(3)如图是椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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