n |
1 |
2 |
3 |
4 |
5 |
|
0 |
0 |
0 |
0 |
0 |
||
4 |
||||||
2 |
||||||
0 |
0 |
0 |
0 |
0 |
①对于 , = , = , , ;
②直线 一定经过的点的坐标为;
求证:1<m<2.