2x |
x-1 |
2x |
x-1 |
2x2 |
x2-1 |
2x1 |
x1-1 |
-2(x1+x2) |
(x1-1)(x2-1) |
bx-1 |
a2x+2b |
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 |
© 2017-2019 超级试练试题库,All Rights Reserved.