解题方法
1 . 已知指数函数
且
的图象经过点
.
(1)求指数函数
的解析式;
(2)求满足不等式
的实数
的取值范围.
![](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/36e3f5ce1fa299e9d1bbe700c7ea8acb.png)
(1)求指数函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)求满足不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38fd1a8a63612ccc18d77da7a6f645a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
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2021-11-11更新
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4卷引用:北京市丰台区2021-2022学年高一上学期期中数学练习试题(A卷)
北京市丰台区2021-2022学年高一上学期期中数学练习试题(A卷)(已下线)专题07 指数函数-2021-2022学年高一《新题速递·数学》(人教A版2019)(已下线)专题4.11 指数函数、对数函数的综合应用大题专项训练(30道)-2021-2022学年高一数学举一反三系列(人教A版2019必修第一册)第三章 指数运算与指数函数-2022-2023学年高一数学北师大版2019必修第一册
2 . 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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648次组卷
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3卷引用:北京市丰台区2021-2022学年高一上学期数学期中练习试题(B卷)
3 . 已知函数
,
,其中
且
,
.
![](https://img.xkw.com/dksih/QBM/2021/1/30/2647463367155712/2648720590233600/STEM/5d7c20d1a3324f8293c79d5f2d13ad58.png?resizew=411)
(Ⅰ)求函数
和
的解析式;
(Ⅱ)在同一坐标系中画出函数
和
的图象;
(Ⅲ)设
,写出不等式
的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95ff35f3b50966a5e3cbb0b5977af7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b77f598a5333de5ab511e8efef01950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b9a961ac7e7aed0aa31509e2e40585.png)
![](https://img.xkw.com/dksih/QBM/2021/1/30/2647463367155712/2648720590233600/STEM/5d7c20d1a3324f8293c79d5f2d13ad58.png?resizew=411)
(Ⅰ)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(Ⅱ)在同一坐标系中画出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(Ⅲ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bca4be345087f993a4078e16c16608e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cfbb21997037d6c236a7f0679b9ea21.png)
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