解题方法
1 . 函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea769ef31f33dab3a950d37b427f1bca.png)
的图象如图所示,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/645977a7f39e507751bf0eba6b90bf87.png)
______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea769ef31f33dab3a950d37b427f1bca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6272fe16885e9f0b4b3bf43eae93ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/645977a7f39e507751bf0eba6b90bf87.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/5ff41ad0-fc8b-4bfa-8e35-476a2073cb74.png?resizew=162)
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2 . 海水受日月的引力,在一定的时候发生的涨落现象叫潮,港口的水深会随潮的变化而变化,某港口水的深度
(单位:米)是时刻
,单位:小时)的函数,记作
,下面是该港口某日水深的数据,经长期观察,曲线
可以近似地看成函数
的图象,根据以下数据,函数
的近似表达式为______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d714b0fbfb440c18bccf6bb64c94385.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb9b65c51e37f40211b876be02105701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb9b65c51e37f40211b876be02105701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3aa8ef4203d918666be40f8c7e233ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb9b65c51e37f40211b876be02105701.png)
![]() | 0 | 3 | 6 | 9 | 12 | 15 | 18 | 21 | 24 |
![]() | 8.0 | 11.0 | 7.9 | 5.0 | 8.0 | 11.0 | 8.0 | 5.0 | 8.0 |
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3 . 已知函数
(其中
),其图象如图所示,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c69303bd9eccb3ccb55c9e4cd03a8a3.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e4892080a918aa2127c09e8d4c28c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8736bd708b07bb5ddf3189f42e440428.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c69303bd9eccb3ccb55c9e4cd03a8a3.png)
![](https://img.xkw.com/dksih/QBM/2020/2/27/2408113767907328/2409612673064960/STEM/c79fd336-e324-4594-a233-f298ea55b323.png)
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4 . 已知函数
的部分图象如图所示,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6927367108dcf8095cc2c7c8ab0fdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da68a35e60d16270caa4b6595e6c7860.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/8062c334-34de-4bc4-aa09-27f82d609a87.png?resizew=160)
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2020-02-29更新
|
486次组卷
|
5卷引用:2020届江苏省如皋、如东高三上学期期中数学试题
2020届江苏省如皋、如东高三上学期期中数学试题2020届黑龙江省哈尔滨市第九中学高三上学期期末考试数学(文科)试题山东省博兴县第一中学2018-2019学年高三4月月考数学(文)试题(已下线)第七篇三角函数01-2020年高考数学二轮复习选填题专项测试(文理通用)(已下线)专题27 盘点由函数图象确定其解析式问题—备战2022年高考数学二轮复习常考点专题突破
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5 . 函数
图像如图所示,其中
,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9448bf1d6136b3a108e7ea60506ad39.png)
______ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46626b75bd7bc420bf32b66e3253b40b.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5e2a383cb47eb87493e86c8c40caf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13378be06b6b01bcad1d261ff14e87cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa6af3e2115ce0aaf5b99ac70c4441d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9448bf1d6136b3a108e7ea60506ad39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46626b75bd7bc420bf32b66e3253b40b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/8a210941-037d-497e-8bef-1da3a6f02cff.png?resizew=138)
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6 . 设函数
的部分图象如图所示, 若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d1750631df3c028bf3b166400acd8e4.png)
_______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de000d92541ca8ea9aaa855eaa5edbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/947fcd94a63c84d9437588e0713997e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d1750631df3c028bf3b166400acd8e4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/38f05586-19ac-4943-b192-dca7510e2ff4.png?resizew=228)
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7 . 已知函数f(x)=2sin(ωx+φ)(ω>0,φ∈[0,π])的部分图象如图所示,其中f(0)=1,|MN|=
,则f(x)在(0,3)上的单调递减区间为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533a7b702ada1dd80123e4041271d521.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/50200de7-1020-4fab-90c2-da97718ee235.png?resizew=222)
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8 . 下图为函数
的部分图像,
是它与
轴的两个交点,
分别为它的最高点和最低点,
是线段
的中点,且
为等腰直角三角形,则
的解析式为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba99a5c5661eedaef4b36ade1a7c5c5.png)
_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e18bbe17e8d5631189feb2a35b14719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d240ea67c239b0d9213448c11cba18c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/887e587a4fb083a37f3d84f42874ec16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff0a3a01bd55bb077d13e46bda390ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba99a5c5661eedaef4b36ade1a7c5c5.png)
![](https://img.xkw.com/dksih/QBM/2019/11/9/2330324301103104/2330383272009728/STEM/ab273e68-89a0-41ff-842f-c74651b04784.png?resizew=263)
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9 . 已知函数
的部分图像如图所示,则
的解析式是
=_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e5e844faf5dc3b5b64f2c070563305.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/3000fa13-422f-4d4e-a60b-22e8068ae645.png?resizew=180)
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2019-12-09更新
|
364次组卷
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3卷引用:上海市新中高级中学2017-2018学年高一下学期期中数学试题
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10 . 已知
、
分别是函数
在
轴右侧图像上的第一个最高点和第一个最低点,且
,则该函数的最小正周期是_____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b84141fdb13b08855a7e7fbeb4fa4ce1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac51bffb8f476896081027b33f7ec25d.png)
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2019-12-03更新
|
249次组卷
|
5卷引用:上海市新川中学2018-2019学年高三上学期期中数学试题