|
A.(1,+∞) | B.[4,8) | C.(4,8) | D.(1,8) |
a |
2 |
a |
2 |
a |
2 |
A..[1,+∞) | B..(2,+∞) | C..(-∞,1] | D.(-∞,0) |
A.f(x)=-x2+x+1 | B.f(x)=
| C.f(x)=log
| D.f(x)=lnx |
4 |
x |
A.5 | B.
| C.
| D.4 |
A.f(0)>f(3) | B.f(0)=f(3) | C.f(-1)=f(3) | D.f(-1)<f(3) |
A.a<b<c | B.a<c<b | C.b<a<c | D.b<c<a |
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