| 3 |
| 2 |
| x2 |
| 4 |
| y2 |
| 9 |
当λ>0时,
| x2 |
| 4λ |
| y2 |
| 9λ |
∴
| 4λ+9λ |
| 13 |
∴λ=1,
∴双曲线方程为
| x2 |
| 4 |
| y2 |
| 9 |
当λ<0时,方程为
| y2 |
| -9λ |
| x2 |
| -4λ |
∴
| -4λ-9λ |
| 13 |
∴λ=-1
∴方程为
| y2 |
| 9 |
| x2 |
| 4 |
综上所述,双曲线方程为
| x2 |
| 4 |
| y2 |
| 9 |
| y2 |
| 9 |
| x2 |
| 4 |
| 3 |
| 2 |
| 13 |
| 3 |
| 2 |
| x2 |
| 4 |
| y2 |
| 9 |
| x2 |
| 4λ |
| y2 |
| 9λ |
| 4λ+9λ |
| 13 |
| x2 |
| 4 |
| y2 |
| 9 |
| y2 |
| -9λ |
| x2 |
| -4λ |
| -4λ-9λ |
| 13 |
| y2 |
| 9 |
| x2 |
| 4 |
| x2 |
| 4 |
| y2 |
| 9 |
| y2 |
| 9 |
| x2 |
| 4 |