![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[主观题]
函数f(x)=sin(2x+3)的周期是______.
函数f(x)=sin(2x+3)的周期是______.
查看答案
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
函数f(x)=sin(2x+3)的周期是______.
设f是实的Lebesgue可测函数,以s,t为周期(满足x∈
,f(x±l)=f(x)的正数l称为f的周期),且s/t是无理数.证明存在常数d使f(x)=da.e.,但f不必是常数.
试证明:
(i)设f(x)是R1上以T>0为周期的可测函数,且,则
,a.e.x∈R1.
(ii),a.e.x∈R1.
试证明:
设φ(x)是R1上的有界可测且以T>0为周期的函数,f∈L(I)(I是一个区间),则
.