已知函数
的值域是
,有下列结论:①当
时,
; ②当
时,
;③当
时,
; ④当
时,
.其中结论正确的所有的序号是.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2a5e465b26277dcf12283984fc753fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/122770c2b2fef10ec927955e21fd7288.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22fc6afa29b5cb55544ea44e78172ee8.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c4e6fb9df362686c043d580a5daf79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c18308627e95f5d06828307a50906c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af82c43d67676367b59aecc57f18c5b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c18308627e95f5d06828307a50906c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1040021ca7e2d98c2948c5d7060b672e.png)
A.①② | B.③④ | C.②③ | D.②④ |
更新时间:2020-01-07 23:38:06
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