kx2-6x+k+8 |
A.k≥1 或k≤-9 | B.k≥1 | C.-9≤k≤1 | D.0<k≤1 |
kx2-6x+k+8 |
4 |
3 |
|
1 |
2 |
1 |
2 |
π |
2 |
π |
2 |
A.最大值为
| ||||||||
B.最大值为
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C.最大值为-
| ||||||||
D.最大值为1-(
|
A.[-2,2] | B.[0,2] | C.[-1,1] | D.[0,1] |
2 | ||
|
A.(-2,+∞) | B.(-2,0) | C.(-2,-1) | D.[-2,+∞) |
1 |
2 |
A.[0,1) | B.(2,3] | C.[2,
| D.(2,
|
4 |
|x|+2 |
A.2 | B.5 | C.6 | D.8 |
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