|
1 |
f(2) |
1 |
f(2) |
1 |
4 |
1 |
f(2) |
1 |
4 |
15 |
16 |
15 |
16 |
A.y=x2-2x+3 | B.y=-|x| | C.y=-lg
| D.e-x |
A.f(x)=2x+1 | B.f(x)=2x2 | C.f(x)=-
| D.f(x)=-|x| |
A.(1,4) | B.(-1,2) | C.(-∞,1)∪[4,+∞) | D.(-∞,-1)∪[2,+∞) |
1 |
2 |
A.3 | B.8 | C.-2 | D.2 |
a |
2 |
A.(0,1) | B.(1,+∞) | C.(1,2
| D.(1,2
|
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