x |
3 |
1 |
2 |
1 |
2010 |
A.
| B.
| C.
| D.
|
x |
3 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
1458 |
1 |
2010 |
1 |
2187 |
1 |
1458 |
1 |
2010 |
1 |
2187 |
1 |
1458 |
1 |
2 |
1 |
486 |
1 |
22 |
. |
162 |
1 |
26 |
1 |
2 |
1 |
27 |
1 |
37 |
1 |
2 |
1 |
36 |
1 |
22 |
1 |
35 |
1 |
27 |
1 |
27 |
1 |
2010 |
1 |
27 |
1 |
128 |
a |
1 |
2 |
b |
1 |
x |
a |
b |
A.(1,+∞) | B.(0,+∞) | C.(-∞,-1)和(0,1) | D.(-∞,0)和(0,1) |
A.y=sinx | B.y=-x2 | C.y=e-x | D.y=x3 |
A.(-∞,-1)∪(1,+∞) | B.(-∞,-
| C.(-1,1) | D.(-
|
b |
x |
A.在(-∞,+∞)上是增函数 |
B.在(0,+∞)上是增函数 |
C.在(-∞,+∞)上是减函数 |
D.在(-∞,0)上是增函数,在(0,+∞)上是减函数 |