![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
设函数f(x)=sin(ω>0),已知f(x)在【0,2π】有且仅有5个零点.下述四个结论:①f(x)在(0,2π)有且仅有3个极大值点②f(x)在(0,2π)有且仅有2个极小值点③f(x)在单调递增④ω的取值范围是其中所有正确结论的编号是()
A.①④
B.②③
C.①②③
D.①③④
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
D、①③④
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.①④
B.②③
C.①②③
D.①③④
D、①③④
A.cos(x^2)+2sinx
B.2xcos(x^2)+2sinxcosx
C.-2xcos(x^2)-2sinxcosx
D.2xcos(x^2)+2cosx
设函数f(x)在(0.+∞)上满足方程
证明:f(x)=f(1),x∈(0,+∞).
设函数f(x)在[0,1]上有连续二阶导数f"(x).若f(0)=f(1)=0,,证明: