名校
1 . 已知函数
的最小正周期为
,则当
时函数
的一个零点是________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9df69aec2db46ac65f8d9121c3d04b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce485410257c9c1fae9d87ce3e44cc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
您最近一年使用:0次
10-11高二上·河北唐山·阶段练习
2 . 下面有五个命题:
①函数
的最小正周期是
;
②终边在y轴上的角的集合是{
|
=
|;
③在同一坐标系中,函数
的图象和函数
的图象有三个公共点;
④把函数
的图象向右平移
单位,得到
的图象;
⑤函数
在
上是减函数.
其中真命题的序号是__________ (写出正确命题的序号).
①函数
![](https://img.xkw.com/dksih/QBM/2011/11/30/1570550283689984/1570550288949248/STEM/9b9dcd92ee684ce4a649415eea6b53b3.png?resizew=127)
![](https://img.xkw.com/dksih/QBM/2011/11/30/1570550283689984/1570550288949248/STEM/1d8afdf2b38642c59ccc8e6625a314a5.png?resizew=13)
②终边在y轴上的角的集合是{
![](https://img.xkw.com/dksih/QBM/2011/11/30/1570550283689984/1570550288949248/STEM/85dbc4dc794c4eed854b1ea47e98433d.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2011/11/30/1570550283689984/1570550288949248/STEM/85dbc4dc794c4eed854b1ea47e98433d.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2011/11/30/1570550283689984/1570550288949248/STEM/88c01eb4347f4f9b8667aa8703658422.png?resizew=67)
③在同一坐标系中,函数
![](https://img.xkw.com/dksih/QBM/2011/11/30/1570550283689984/1570550288949248/STEM/c1cae40d60c44a9b83b9c71c3cbd0807.png?resizew=60)
![](https://img.xkw.com/dksih/QBM/2011/11/30/1570550283689984/1570550288949248/STEM/cd14c03d08764fb2b809f9446db47c71.png?resizew=40)
④把函数
![](https://img.xkw.com/dksih/QBM/2011/11/30/1570550283689984/1570550288949248/STEM/084109264ed146ce9e19928fbd90d1ae.png?resizew=119)
![](https://img.xkw.com/dksih/QBM/2011/11/30/1570550283689984/1570550288949248/STEM/2cf7949ef53d43b889bfaf18a9712a65.png?resizew=17)
![](https://img.xkw.com/dksih/QBM/2011/11/30/1570550283689984/1570550288949248/STEM/5b63fa4f9afc4e609cdfda4e7b65e6c4.png?resizew=77)
⑤函数
![](https://img.xkw.com/dksih/QBM/2011/11/30/1570550283689984/1570550288949248/STEM/36e59a1c872947f2a430791553ba75d1.png?resizew=101)
![](https://img.xkw.com/dksih/QBM/2011/11/30/1570550283689984/1570550288949248/STEM/a444ef60b8c24835aae00041385af250.png?resizew=36)
其中真命题的序号是
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