(1)化简:
;
(2)令
,用a表示
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db040dd7f71389c18e001acfff00633f.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a08a2a5540efcdb5a77aa4ea3049884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d5e050cc8d6d9f551cc80b342f0505.png)
21-22高一上·上海黄浦·期末 查看更多[6]
上海市大同中学2021-2022学年高一上学期期末数学试题(已下线)专题03幂、指数与对数(5个考点)【知识梳理+解题方法+专题过关】-2022-2023学年高一数学上学期期中期末考点大串讲(沪教版2020必修第一册)(已下线)第08讲 幂、指数与对数(5大考点)(1)(已下线)3.2 对数的运算法则(第2课时)(作业)(夯实基础+能力提升)-【教材配套课件+作业】2022-2023学年高一数学精品教学课件(沪教版2020必修第一册)(已下线)第三章幂、指数与对数全章复习与检测卷-【倍速学习法】(沪教版2020必修第一册)(已下线)专题09对数-【倍速学习法】(沪教版2020必修第一册)
更新时间:2022-01-21 12:56:42
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【推荐1】计算下列各式的值:
(1)已知
,求
的值
(2)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a8c9f990fc696c4b27d02cb9e92fe9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb012dc03f38b14804f1849c5c0541d.png)
(2)
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【推荐1】已知函数
(其中
在
上单调递减,点
,
,
是函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
图象上三点,满足
.
(1)求证:
,
,
三点不共线;
(2)求证:
是钝角三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a8acdbf533b367bbd207e267e7e4d22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7d9cd8123d0c0a8cf2d8007abb79397.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45dddee525114c09ee0d1205aed6e7b.png)
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(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐2】(1)计算
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(2)已知集合
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【推荐1】设函数
.
(1)若不等式
在
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的取值范围;
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且
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4cd02b69b76000f9b9826d9929a324.png)
(1)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c996a4c596f4a613b32563626855a80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)在(1)的条件下,当
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【推荐3】如图为一台冷轧机的示意图.冷轧机由若干对轧辊组成,带钢从一端输入,经过各对轧辊逐步减薄后输出.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/a8652359-f7f3-47a3-8ac2-6769038339a3.png?resizew=383)
(1)输入带钢的厚度为
,输出带钢的厚度为
,若每对轧辊的减薄率不超过
.问冷轧机至少需要安装多少对轧辊?(一对轧辊减薄率
)
(2)已知一台冷轧机共有4对减薄率为20%的轧辊,所有轧辊周长均为1600若第k对轧辊有缺陷,每滚动一周在带钢上压出一个疵点,在冷轧机输出的带钢上,疵点的间距为
.为了便于检修,请计算
并填入下表(轧钢过程中,带钢宽度不变,且不考虑损耗).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/a8652359-f7f3-47a3-8ac2-6769038339a3.png?resizew=383)
(1)输入带钢的厚度为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
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(2)已知一台冷轧机共有4对减薄率为20%的轧辊,所有轧辊周长均为1600若第k对轧辊有缺陷,每滚动一周在带钢上压出一个疵点,在冷轧机输出的带钢上,疵点的间距为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d327216c2b7d31491dcbd22c71dae42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f6bceba89ed9a23743dec7542e8a0bb.png)
轧辊序号 | 1 | 2 | 3 | 4 |
疵点间距![]() | 1600 |
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