函数
的单调增区间为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777853b325142f1f5fcb9595b185ea0.png)
2017·山西·一模 查看更多[2]
更新时间:2017-03-11 10:52:15
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【推荐1】如果实数x,y满足
,则称x,y“余弦相关”.设
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【推荐2】已知函数
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个单位长度得到
的图象,则函数
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解题方法
【推荐1】已知函数
(其中
)的部分图象如图所示,有以下结论:
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0360cdbea0a62afc1441f521cd55be4a.png)
②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2eabed6be99b47f304f15a73c07a15e.png)
③
在
上单调递增
所有正确结论的序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/884a566e78bf6a47d901871960c1d000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/391c6eae0f77490c5afb7405c9f80820.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0360cdbea0a62afc1441f521cd55be4a.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2eabed6be99b47f304f15a73c07a15e.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e6e99f08f19edb69fbba87107dd5ee9.png)
所有正确结论的序号是
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/12/3273431d-f00f-458f-83b4-4ea01c984937.png?resizew=149)
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解题方法
【推荐2】已知函数
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的图象关于
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在
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad814089e37543b2f547af9ae75b6dd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa5f8e8c2a9c350db774ed54c8200f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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【推荐3】已知
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①
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②当
时,
有最小值
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③
是函数
的一个单调递增区间;
④点
是函数
的一个对称中心.
![](https://img.xkw.com/dksih/QBM/2014/12/1/1571905675091968/1571905680957440/STEM/7dbac03fe7ce49ef9ca7cb3964169a06.png?resizew=80)
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①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9fdc1f8ed0ae44b54a9a2a3aca2db4.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e60b49815c5c25b48e6c74d7077851a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cce6739312eddbb23b128bf645471db3.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee2861e836e0d4a2b5a2675e767d9f80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
④点
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