已知函数
的图象的一条对称轴是
.
(1)求
的单调减区间;
(2)求
的最小值,并求出此时
的取值集合.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9694c71f13a9708e6ae8338e61e7a907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433ac87718a34d09731849021d34935b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
更新时间:2023-01-07 12:12:46
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【推荐1】函数
的部分图象如图所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/a97411dd-b40b-4507-8274-7dc94763d5f5.png?resizew=183)
(Ⅰ)求
的最小正周期及解析式;
(Ⅱ)设
,求函数
在区间
上的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f0dc37e8ac57bef37dc6a5c6b94ddb7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/a97411dd-b40b-4507-8274-7dc94763d5f5.png?resizew=183)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78a0668511c2a59c763bbd962d61d6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b77857e15ae11fc94a5e33bfc12d26.png)
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解题方法
【推荐2】设函数
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(1)求
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(2)当
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的最值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd3120316f9cf5d05a9771ac8ff3392e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c21376567e7a56b85e967dc4f2a5cef3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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【推荐1】已知函数
的图象的一条对称轴是直线
.
(1)求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11e9830c6ba315f1170fa541e477483c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e60b49815c5c25b48e6c74d7077851a.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
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【推荐2】已知函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5170e87322172ef27379adb171d4b76e.png)
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(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d69645fdf5c4b4c1f950760c5df65796.png)
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【推荐1】已知函数
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(1)求函数
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f9e31c4547f437de7a0f5ed4349dd3.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/295617bd326a38dc5e845892746a9f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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名校
【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22b5bc19044f837d215f8c387a9c8400.png)
(1)求
的最小值及对应的
的集合;
(2)求
在
上的单调递减区间;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22b5bc19044f837d215f8c387a9c8400.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55cfcbb5c5950e18a8452b38bb17036.png)
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