x |
4-x |
A.[2,4] | B.[0,2
| C.[4,2
| D.[2,2
|
x |
4-x |
π |
2 |
5 |
π |
2 |
5 |
5 |
|
A.(-∞,+∞) | B.(-1,0)∪[1,+∞) | C.(-∞,0]∪(1,+∞) | D.(-1,+∞) |
A.[0,1) | B.(0,1] | C.[-1,1] | D.[-1,0)∪(0,1] |
A.(0,1] | B.(0,1) | C.(0,+∞) | D.R |
A.f(x)=-x3 | B.f(x)=x3+1 | ||||
C.f(x)=
| D.f(x)=lg
|
A.(-∞,-1] | B.[3,+∞) | C.[-1,3] | D.(-∞,-1]∪[3,+∞) |
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