函数
在区间
上的最大值为________ ,最小值为_________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4afb0c230df5a6f686fa6baf1d0f6a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7242b2ab643f9470da77e29d043b893.png)
更新时间:2019-11-25 08:48:54
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【推荐1】函数
,
的值域为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4426903eb63c0cf1b8e19d97f25398f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f698c5a46ab32f72dc313d37f024accf.png)
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【推荐2】已知函数
,
,若对于任意
,存在
,使得
,则实数a的取值范围是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe5effb3053cf609f59178641cd48167.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc103e3555585a9c3b7531760d574433.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/149c7d5a133de87d3c189239c5899d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b440b792b9ec93d9aedabfb100892eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec6154e00013d9dee84c0e941f676ea9.png)
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【推荐1】函数
的定义域为A,若
且
时总有
,则称
为单函数.例如,函数
是单函数.下列命题:
①函数
是单函数;
②函数
是单函数;
③若
为单函数,
且
,则
;
④若函数
在定义域内某个区间D上具有单调性,则
一定是单函数.
其中真命题是 (写出所有真命题的编号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a5b8dffc3b2893ecbb8b5be4f2faee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2037b0bad7c7a312bac1ac0653d9a491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f333263260646c494225db8a7476c00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f39f9388bf6f4fc35e531715baca55c.png)
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6515847fe3105ca8a9f2a4f868602811.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d64fc5bb331364bf3a6cab9d233c4fdf.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a5b8dffc3b2893ecbb8b5be4f2faee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0c6d440e7d191ac105787d026eebea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1a9cd4c597b821b165e54f5471354a9.png)
④若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
其中真命题是 (写出所有真命题的编号).
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【推荐2】已知函数
成立的实数
的取值范围是_________________ .
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572382442594304/1572382448623616/STEM/ac1d3e9c5e474cf59886a5a5afd7a684.png?resizew=287)
![](https://img.xkw.com/dksih/QBM/2015/12/23/1572382442594304/1572382448623616/STEM/14164b5f7482459cb6b4e007581679a1.png?resizew=16)
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