11-12高三·北京门头沟·单元测试
1 . 下面四个命题:
①已知函数
且
,那么
;
②一组数据
,
,
,
,
的平均数是
,那么这组数据的方差是
;
③要得到函数
的图象,只要将
的图象向左平移
单位;
④已知奇函数
在
为增函数,且
,则不等式
的解集为
.
其中正确的是__________________.
①已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e68fa75b14d86d712cec91c079f7a56e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2083faa904d12f66e11998eca8c2fb77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e500ffa9a019dc4ef252da97c5f5601a.png)
②一组数据
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b837fd9c52f60bfb3b6852733abc790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1834490aacbee800ed5721312f4be1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be7581dbbccda50e5d5cd18056ddea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f76fba0fe83cf0aa9a68210591cac1a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7f27ebcef70a3ebbbe8d2e53ea0896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
③要得到函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ecf2e8c771d394db31169b5813fcc8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/325f9e2f7784ebdd64292e805884dfa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecdab625e32e38d1c72c901cece0e147.png)
④已知奇函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9252e68a525f7b68029fe1d5c45ade6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aac04dfd339a2b801cd8d4b2b2e2a78a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/030805eebb5ad0a065f93bd6f652f687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe024b9b28412fe2221d214645e1613e.png)
其中正确的是__________________.
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