名校
1 . 有下列四个命题中正确命题的个数是( )
①
是空集;②集合
有两个元素;
③若
,则
;④集合
是有限集.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5f5e5688b5c7e514ee72597690a7676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d1841f0c1cc2bfcf38fe6933015a523.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a7e34f15b46c51888ad96b233f0f5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/820ec56460819f6778374192faa907ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4296dee28033b10a74fa3bf819e1f6.png)
A.0 | B.1 | C.2 | D.3 |
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2011·福建厦门·一模
2 . 已知集合M是满足下列性质的函数
的全体:存在非零常数k,对定义域中的任意x,等式
=
+
恒成立,现有两个函数:
,
,则函数
、
与集合
的关系为___________________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51f3f503b88b09c159a391663450c817.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4645b6368eae25e9ecede56e45a8459.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ba1b1f556e69cb95504f0323d3a941.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dce2bfe6e1fde9265d2a07c42bbdf58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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