题干
（2016•天津）设椭圆
+
1（a＞ 3 ）的右焦点为F，右顶点为A，已知
+
=
，其中O为原点，e为椭圆的离心率．
| x |
| 2 |
| a |
| 2 |
| y |
| 2 |
| 3 |
| 1 |
| | |
| O |
| F |
| | |
| 1 |
| | |
| O |
| A |
| | |
| 3 |
| e |
| | |
| F |
| A |
| | |
