已知定义在R上的偶函数
在
上递减,若不等式
对
恒成立,则实数
的取值范围是__________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd4a91eaab64515f76afd4b82b11c1bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca1647778e4c25e8b095d0d994201bc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fc00c159d0b3efdb58a4fad526433c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2018-10-27 00:09:40
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【推荐2】偶函数
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【推荐3】定义域为R的函数
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【推荐3】已知函数
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(2)若
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内是减函数,
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解集为
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(3)若
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为常数,若对任意的
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关于
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其中所有正确的结论序号为_________
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(1)若对任意
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(2)若
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(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7c2f04d21aea34b30646a2bfc1ddeb3.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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其中所有正确的结论序号为
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【推荐2】若定义在
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,
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__________ .
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