定义函数
,给出下列四个命题:
(1)该函数的值域为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417ab20883d799aaf311371393fa7d7c.png)
(2)当且仅当
时,该函数取得最大值
(3)该函数是以
为最小正周期的周期函数
(4)当且仅当
时,
.
上述命题中正确的序号是______________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e6c32f376cc4d2acca842c5aba64a4.png)
(1)该函数的值域为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417ab20883d799aaf311371393fa7d7c.png)
(2)当且仅当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03458f6d13ebcb4e49fe069a52ca4e0.png)
(3)该函数是以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
(4)当且仅当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31ad68f5c61b03191f324f21d1ec4b71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b666663ce3537a634a3b427b418eb62.png)
上述命题中正确的序号是
更新时间:2021-08-14 12:52:31
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