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)
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2021-11-11更新
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3卷引用:第6章 幂函数、指数函数、对数函数(章末测试基础卷)-2021-2022学年高一数学同步单元测试定心卷(苏教版2019必修第一册)