bx-1 |
a2x+2b |
1 |
a2x |
bx-1 |
a2x+2b |
b |
2a |
b |
2a |
b |
2a |
b |
2a |
|
|
|
|
1 |
x-1 |
A.在(-1,+∞)内单调递增 | B.在(-1,+∞)内单调递减 |
C.在(1,+∞)内单调递增 | D.在(1,+∞)内单调递减 |
a |
x+1 |
1 |
2 |
A.a>1 | B.1<a<
| ||
C.0<a<1 | D.0<a<1或1<a<
|
A.f(x)=3-x | B.f(x)=
| ||
C.f(x)=-x2-2x-1 | D.f(x)=-|x| |
x2 |
x+1 |
n-
| ||
n-
|
A.a1,a30 | B.a1,a9 | C.a10,a30 | D.a10,a9 |
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