![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
已知函数f(x)=2cosx(sinx+cosx)-1.(1)求f(x)的最小正周期()
A.π
B.2π
C.2分之π
D.4π
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
Π
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.π
B.2π
C.2分之π
D.4π
Π
已知函数f(x)=x4+mx2+5,且f’(2)=24. (1)求m的值; (2)求函数f(x)在区间[-2,2]上的最大值和最小值.
已知函数f(x)=5x+6,若f(-2)=3,则b=() A.3 B.15 C.7 D.13
已知函数y=f(x)是奇函数,且f(-5)=3,则f(5)= ()
A.5
B.3
C.-3
D.-5