1 . 已知函数
且
,
,函数
的图象经过点
.
(1)写出函数
的解析式;
(2)在同一个坐标下用描点法作出函数
的图象,并求出当函数值
时,自变量
的取值范围;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/de907854-d6a2-4c49-bde1-a5c3bff7d21c.png?resizew=244)
(3)当
时,用
表示
中的最小者,记
(例如,
),求函数
的值域.(请直接写出结果)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d201389571180846b7b0025d6aebaea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37fa1476cf3552b9ae91ef039b1c6c80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfd1903a419bd5cd4553d7eb0471c010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e786f7887e437328abbd866560dcf3f2.png)
(1)写出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)在同一个坐标下用描点法作出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c0ed188d083966baaae94e6b86064f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a091d19ca24ab717df9f9e7db3cbd13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/de907854-d6a2-4c49-bde1-a5c3bff7d21c.png?resizew=244)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc8758978e083d2e7c06cb6a28a79a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c0ed188d083966baaae94e6b86064f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3a643192424ef801036a576af37d188.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e358cf47e0dbcd6de1b4d1ede2709a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc8758978e083d2e7c06cb6a28a79a3.png)
您最近一年使用:0次
2021-11-11更新
|
648次组卷
|
3卷引用:广东省江门市2021-2022学年高一上学期期末(一)数学试题
名校
解题方法
2 . 某毕业生原有存款1000元,计划从工作后的第一年开始以每年
的增长率递增存款.(
,
,
,
)
(1)设x年后他的存款为y元,试写出y关于x的函数解析式;
(2)从他工作后第几年开始他的存款数超过4000元.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8ee628efd6b2f7296c106dd5cbae42f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8288e1d872c6b5872b84a32469ff9e76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b841776f01bd0500b1f01f69c32ad226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f54c33e75c10bb2fb2b4788a9a47dbcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134f31498ae4b9eaf2c07fc383f0e162.png)
(1)设x年后他的存款为y元,试写出y关于x的函数解析式;
(2)从他工作后第几年开始他的存款数超过4000元.
您最近一年使用:0次