已知函数
是定义在R的偶函数,当
时,
若函数
有且仅有6个不同的零点,则实数a取值范围_____________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a154aa77357cb73cbcd37275d873a324.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfdef4c13e85f0f16a46c5251cfb605b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b480d04ee966a028e0febdf54d4415db.png)
更新时间:2017-05-18 22:58:36
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(0.15)
【推荐1】已知函数
的定义域为
,若存在常数
,使得
对所有实数
均成立,则称函数
为“期望函数”,给出下列函数:
①
;②
;③
;④
;
其中为“期望函数”的是__________ .(写出所有正确的序号)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/318a16f1950d06e5500c76d8f81a507f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d45e9bb438a011f890a8827795aad3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee40803bfd576cf49b85c8b567fc5b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b383f0f54f015453a3bbb29614df7d.png)
其中为“期望函数”的是
您最近一年使用:0次
填空题-单空题
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困难
(0.15)
【推荐2】已知函数
的定义域为
,若存在常数
,使得
对所有实数
均成立,则称函数
为“期望函数”,给出下列函数:
①
;②
;③
;④
;
其中为“期望函数”的是__________ .(写出所有正确的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d7b11c8322cf492838e3e177ad0376a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/318a16f1950d06e5500c76d8f81a507f.png)
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其中为“期望函数”的是
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【推荐1】设函数
,其中
,若
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是
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的取值范围为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a067e86ae162185a04bdf862b40cd255.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd492824debc778732f80ad5fc6ab5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
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【推荐2】设
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
您最近一年使用:0次