-2x+b |
2x+1+a |
-1+b |
2+a |
-2-1+1 |
20+a |
-2+1 |
22+a |
-2x+1 |
2x+1+2 |
1 |
2 |
1 |
2x+1 |
1 |
2 |
1 |
2x1+1 |
1 |
2 |
1 |
2x2+1 |
2x2-2x1 |
(2x1+1)(2x2+1) |
1 |
3 |
1 |
3 |
1 |
3 |
1 |
3 |
1 |
2 |
|
1 |
2 |
A.(-∞,0) | B.(0,+∞) | C.(-∞,-1) | D.(1,+∞) |
4 |
x-2 |
9 |
3-x |
A.f(
| B.f(
| ||||
C.f(
| D.以上关系均不确定 |
A.1 | B.
| C.
| D.2 |
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