9 |
4 |
25 |
4 |
3 |
2 |
25 |
4 |
定義域?yàn)椤?,m〕
那么在x=0時(shí)函數(shù)值最大
即y最大=(0-
3 |
2 |
25 |
4 |
9 |
4 |
25 |
4 |
又值域?yàn)椤?
25 |
4 |
即當(dāng)x=m時(shí),函數(shù)最小且y最小=-
25 |
4 |
即-
25 |
4 |
3 |
2 |
25 |
4 |
0≤(m-
3 |
2 |
9 |
4 |
即m≥
3 |
2 |
即(m-
3 |
2 |
9 |
4 |
m-
3 |
2 |
3 |
2 |
3 |
2 |
3 |
2 |
0≤m≤3 (2)
所以:
3 |
2 |
故選C.
25 |
4 |
25 |
4 |
3 |
2 |
3 |
2 |
9 |
4 |
25 |
4 |
3 |
2 |
25 |
4 |
3 |
2 |
25 |
4 |
9 |
4 |
25 |
4 |
25 |
4 |
25 |
4 |
25 |
4 |
3 |
2 |
25 |
4 |
3 |
2 |
9 |
4 |
3 |
2 |
3 |
2 |
9 |
4 |
3 |
2 |
3 |
2 |
3 |
2 |
3 |
2 |
3 |
2 |