名校
1 . 已知函数
其中
表示不超过x的最大整数.例如:
给出以下四个结论:
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac9240d28d04925af94622c1b44452c7.png)
②集合
的元素个数为
;
③存在
,对任意的
,有
;
④
对任意
都成立,则实数
的取值范围是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c296c025b3fb6317f0ac470b4a9816e.png)
其中所有正确结论的序号是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17f5aa173f638f197610da7be862f77c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3206a00b633415468a59fac4fee543d2.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac9240d28d04925af94622c1b44452c7.png)
②集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/738fddadc955446dd7c3067129bdf256.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
③存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c6b9e309330cf126628e6011c7a881d.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8e75172311d14e4b54e4ccbeb5f181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966cc43fa3220739f2d2e091fe4b30f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c296c025b3fb6317f0ac470b4a9816e.png)
其中所有正确结论的序号是
您最近一年使用:0次
名校
2 .
在区间
上有且仅有3个对称中心,给出下列四个结论:
①
的取值范围是
;
②
的最小正周期可能是
;
③
在区间
上单调递减;
④
在区间
上有且仅有3条对称轴;
其中所有正确结论的序号是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c3ade3f16c8552977282a7b6630f42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55cfcbb5c5950e18a8452b38bb17036.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa7bc82c8d475d819e7e5a62e78a698.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/732250efe9c8c0cbca127fb2ed2a4bf9.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d126bc94860926a0792fc306ab9985.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71163f419555f2ed76075c8ff659fbfc.png)
其中所有正确结论的序号是
您最近一年使用:0次