|
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
|
A.[2,5] | B.{2,4,5} | C.(0,20) | D.N |
A.(0,+∞) | B.[0,+∞) | C.(1,+∞) | D.[1,+∞) |
1 |
1+x2 |
A.(0,1) | B.(0,1] | C.[0,1) | D.[0,1] |
8x |
x2+2 |
A.当x=2时,取得最小值
| B.当x=2时,取得最大值
| ||||||||
C.当x=
| D.当x=
|
1 | ||
|
A.f(x)=lnx | B.f(x)=
| C.f(x)=x3 | D.f(x)=ex |
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