1 |
3x |
A.(-∞,-2) | B.(-2,2) | C.(-∞,+∞) | D.[0,+∞) |
1 |
3x |
1 |
3x |
1 |
x-1 |
A.(-∞,2] | B.(-∞,-2] | C.[2,+∞) | D.[-2,+∞) |
1-x |
x-4 |
A.(1,4) | B.[1,4) | C.(-∞,1)∪(4,+∞) | D.(-∞,1]∪(4,+∞) |
1 |
x |
-x2-3x+4 |
A.{x|-1<x<4} | B.{x|-4<x<1且x≠0} |
C.{x|-4≤x≤3且x≠0} | D.{x|-1<x<4} |
log2x-2 |
A.[3,+∞) | B.[4,+∞) | C.(3,+∞) | D.(4,+∞) |
log2(2x-1) |
x-1 |
A.{x|x>
| B.{x|x≠1} | ||||
C.{x|
| D.{x|x>
|
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