已知函数
,对于
上的任意
有如下条件:
①
;②
;③
,
其中能使
恒成立的条件是_________ (填写序号)
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572500246609920/1572500252631040/STEM/23e8bc5428234b7baf0f2538285ffc83.png?resizew=125)
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572500246609920/1572500252631040/STEM/a1fa884809954e86bd31d08bbef25d69.png?resizew=74)
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572500246609920/1572500252631040/STEM/a72ef8306f78493fb7938011508a704a.png?resizew=37)
①
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572500246609920/1572500252631040/STEM/92ff010e80c142b9b108ef2ec0020c62.png?resizew=49)
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572500246609920/1572500252631040/STEM/7966cba4a9404588b777890c04ba2112.png?resizew=62)
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572500246609920/1572500252631040/STEM/e5de8bf9ce8c4c20bf94edb998957574.png?resizew=59)
其中能使
![](https://img.xkw.com/dksih/QBM/2016/2/26/1572500246609920/1572500252631040/STEM/5d36e865008b429c88cef363f59d0a3b.png?resizew=96)
更新时间:2016-12-04 02:42:51
|
【知识点】 函数综合
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【推荐1】对于定义在
上的函数
,若存在正常数
,使得
对一切
均成立,则称
是“控制增长函数”.在以下四个函数中:①
②
③
④
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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【推荐2】已知下列四个命题:
①函数
满足:对任意
,有
;
②函数
均为奇函数;
③若函数
的图象关于点(1,0)成中心对称图形,且满足
,那么
;
④设
是关于
的方程
的两根,则
其中正确命题的序号是______ .
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddb2dd9a150351a918ab146c25a797d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0da2a980e08bfc436108b080a5905977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d3dbbb678b0b13c53ae5afa3f32d43.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff6a80d51a8fbfdd112b1edd8315043.png)
③若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ffd18ffffce948288149b695cce427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/952ea5b408a9ba868ca7fa00cd93bcc0.png)
④设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be07753eab86fa9c439a65db51c9a9e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31d900314efb0e4cacb6e5de945b5397.png)
其中正确命题的序号是
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