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.