S=
1 |
2 |
∵kAB=
6?1 |
3?1 |
5 |
2 |
∴直線AB的方程是y-1=
5 |
2 |
∴|CH|=
|5x?2y?3| | ||
|
|5x?2y?3| | ||
|
∵|AB|=
(3?1)2+(6?1)2 |
29 |
∴
1 |
2 |
29 |
|5x?2y?3| | ||
|
化簡(jiǎn),得|5x-2y-3|=6,即5x-2y-9=0或5x-2y+3=0,這就是所求頂點(diǎn)C的軌跡方程…(12分)
1 |
2 |
6?1 |
3?1 |
5 |
2 |
5 |
2 |
|5x?2y?3| | ||
|
|5x?2y?3| | ||
|
(3?1)2+(6?1)2 |
29 |
1 |
2 |
29 |
|5x?2y?3| | ||
|