符号
表示不超过x的最大整数,如
,
,
,定义函数
,以下结论正确的是( )
①函数
的定义域是R,值域为[0,1);
②方程
有无数个解;
③函数
是奇函数;
④函数
是增函数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2ab85825d4a002600ca41bd3cd2ee7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/239da0d432f374cbd47bbcc3f120bc6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87ea02e718c638f94174db08de61ea3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/613004861ffc72cf3e54fd76340668b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/575ee8b07f40772a9b87075cc609b116.png)
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda2bc2e6a5eaf4fa5ff901985dd0e53.png)
②方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4cf0884e02794ee4745bb647f303c1a.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda2bc2e6a5eaf4fa5ff901985dd0e53.png)
④函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda2bc2e6a5eaf4fa5ff901985dd0e53.png)
A.①② | B.②③ | C.①②③ | D.②③④ |
21-22高一上·山西朔州·期中 查看更多[2]
更新时间:2021-11-17 18:11:00
|
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【推荐2】设函数
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①
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③
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【推荐2】已知函数f(x)使得函数
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【推荐2】已知集合
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②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d603992909b323d7a833d9f755630c0.png)
③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7b79073f6ae25cc9bcca5108f4eb439.png)
④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcdff4091a7ebadfe87488bebb689b00.png)
其中所有“
集合”的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/840bd73317f781e4b6ba65625a72f67e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ec6481a31d338e905d607bc17fdd6e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa35373ec4e4684107b42adb7a5161.png)
①
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②
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③
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④
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其中所有“
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A.①③ | B.①④ | C.②④ | D.②③④ |
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