1 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf237238d148f7ae52b9cc3323428689.png)
______ .(用含a,b的代数式表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aed14dc8f803b78a1045db3c2243bb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf237238d148f7ae52b9cc3323428689.png)
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名校
2 . 分贝(
)、奈培(
)均可用来量化声音的响度,其定义式分别为
,
,其中
为待测值,
为基准值.如果
,那么
( )(参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca586d4c35ce52dec4b545cf13ee0721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34ece77b7eef9fef88a9e7ca6e55e1ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f8b354e499e33f00f1cc2727a5b9aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff5ac6b85f01dfad80aabf225d206fa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7356ec98b600ece41f3a6b4bc26a7d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b659b8e3b4a8b9b18166204449e0287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae278be44b0bc72d1da5563b8ffc7c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c0b518241e885bc3b4b554f71c76106.png)
A.8.686 | B.4.343 |
C.0.8686 | D.0.115 |
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2023-11-02更新
|
522次组卷
|
4卷引用:2.2用函数模型解决实际问题-同步精品课堂(北师大版2019必修第一册)
(已下线)2.2用函数模型解决实际问题-同步精品课堂(北师大版2019必修第一册)北京市东方德才学校2023-2024学年高一上学期12月月考数学试卷北京市丰台区2024届高三上学期期中练习数学试题北京市陈经纶中学2023-2024学年高三上学期数学阶段性诊断练习6
2023高一·上海·专题练习
3 . 若正实数a、b、c均不为1,满足
,且
,则
的值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913b94434fcc75d45c67304baaad0449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee7eeedfa430910d0a3fd0d23332683e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d2d7ddd7ef3b6cde30018bc6a84b9e0.png)
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2023高一·江苏·专题练习
4 . 计算:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03fc3af662e2eb29147c324a0fcd5c13.png)
(2)
;
(3)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03fc3af662e2eb29147c324a0fcd5c13.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aff85b51b6a05e3fff87e6ec6a50970.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bc32eac91ff381aa22efe9ef6fc1acf.png)
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名校
5 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ccae86937bff30f71dfa4d589e8293.png)
______ .(用含a,b的代数式表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aed14dc8f803b78a1045db3c2243bb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ccae86937bff30f71dfa4d589e8293.png)
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解题方法
6 . 已知
,
,
,则a,b,c的大小关系为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/115e675e7470c2fb7b98ff3d0857263d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6742abf993ac90ed7e026c0ea7f8824e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d3c5200c735b8301389cd20332e137.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-10-18更新
|
351次组卷
|
7卷引用:3.2~3.3对数函数的图象和性质-同步精品课堂(北师大版2019必修第一册)
(已下线)3.2~3.3对数函数的图象和性质-同步精品课堂(北师大版2019必修第一册)(已下线)专题02函数与导数(选择填空题1)(已下线)专题02函数与导数(选择填空题1)四川省成都石室阳安学校2023-2024学年高三上学期10月月考数学(理)试题江西省赣州市2023届高三摸底考试数学(文)试题江西省赣州市2023届高三摸底考试数学(理)试题江西省赣州市2023届高三下学期3月摸底理科数学试题
23-24高一上·江苏南通·阶段练习
7 . 若
,且
,则实数
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab73385b9d1636b4f41a730e7063ca2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5886dd7aa4d4b9b03920cf6b96c9a34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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8 . 已知a,b是方程
的两个实数根,求下列各式的值:
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b632669adb8f2859f1335aedb63512a6.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04af04d6a45fd724ad8b8de78b615965.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5c9cd9d577c47efbdcefd03d71792be.png)
您最近一年使用:0次
9 . 已知
,
,请用a,b表示下列各数的值:
(1)
;
(2)
;
(3)
;
(4)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a08a2a5540efcdb5a77aa4ea3049884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850df3e299d9b1ecbda7e3a59e2a255e.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930f7706c8f0a021d2e81f1cba24cca0.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede9f9b1dbd9fd7245f8d032fe1f083d.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e7613e04019ca879f8269196d0c3527.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ed4bed77efc425c51335b4c64761237.png)
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2023-10-09更新
|
249次组卷
|
4卷引用:北师大版(2019)必修第一册课本习题 习题4-2
北师大版(2019)必修第一册课本习题 习题4-2(已下线)2.2换底公式-同步精品课堂(北师大版2019必修第一册)(已下线)习题 4-2【导学案】2.2 换底公式课前预习-北师大版2019必修第一册第四章对数运算与对数函数
10 . 求值:
(1)
;
(2)
;
(3)
;
(4)
;
(5)
;
(6)
;
(7)
;
(8)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/738f315a3d366fec9eae6597cda3d625.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57c08dce84166f81e44ab85603bf7033.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/608dc60f6d3a978701060e4a5d716357.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/054e3da8fd8803b042e5f13beb8ac16e.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30db5859c8a105ca354310bb396a085.png)
(6)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f8e5d7a8082a7077d1633ae86eed55.png)
(7)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ae38427793c44fabd9b7531aabd626c.png)
(8)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d68d0c7834f382482c5f8ca5bcd252c7.png)
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