x-1 |
x+1 |
1 |
f-1(x) |
x |
x |
x |
1 |
4 |
1 |
2 |
1+
| ||
1-
|
1-
| ||
1+
|
x |
2 | ||
1+
|
x |
2 |
2 | ||
1+
|
x |
2 |
2 |
x |
x |
x |
x |
1 |
2 |
| ||
2 |
1 |
2 |
| ||
2 |
3 |
2 |
1 |
4 |
1 |
3 |
A.(
| B.(0,e2+
| C.(e2+
| D.(-∞,e2+
|
a |
a-1 |
1 |
x |
A.充要条件 | B.充分不必要条件 |
C.必要不充分条件 | D.既不充分又不必要条件 |
A.[3+2
| B.(-∞,3+2
| C.[3-2
| D.(-∞,3-2
|
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