a |
3x |
2 |
3x |
2 |
b |
x |
2 |
x |
2 |
π |
2 |
a |
b |
a |
b |
a |
b |
a |
b |
3 |
2 |
a |
b |
3x |
2 |
x |
2 |
3x |
2 |
x |
2 |
. |
a |
. |
b |
(cos
|
2+2cos2x |
x |
2 |
a |
b |
a |
b |
a |
b |
3 |
2 |
1 |
2 |
3 |
2 |
5 |
8 |
1 |
2 |
A.是增函数 | B.不是单调函数 |
C.是减函数 | D.不能确定 |
A.-13 | B.13 | C.-19 | D.19 |
A.a≤
| B.-
| C.0<a≤
| D.-
|
A.f(3)<f(-5)<f(-4) | B.f(-4)<f(-5)<f(3) | C.f(3)<f(-4)<f(-5) | D.f(-5)<f(-4)<f(3) |
|
1 |
4 |
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