1 . 填空
指数式 | ![]() | ![]() | ![]() | ![]() | ||
对数式 | ![]() | ![]() |
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2 . 仿照“用计算器求
的值”的方法,证明对数的换底公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed5faff5d08e2976e15f0cec988ced37.png)
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2023-10-08更新
|
36次组卷
|
3卷引用:北师大版(2019)必修第一册课本习题第四章2.2换底公式
3 . 用m,n或b,c表示x,其中m,n,a,b,c均大于0,且
.
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a9ba448405a3a304be9c6cfbad27a1c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e5b3e90b617717e7057a3794836c4d0.png)
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4 . 锶90是发生核爆后产生的主要辐射物之一,它每年的衰减率为2.47%,那么大约经过( )年,辐射物中锶90的剩余量低于原有的7.46%(结果保留为整数)
(参考数据:
,
)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/575705126a4a523e31b5b6d4b5db3d7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a981027d6a57e8e52e179905048c155e.png)
A.83 | B.85 | C.87 | D.90 |
您最近一年使用:0次
名校
5 . 欧拉是十八世纪数学界最杰出的人物之一,他不但在数学上作出伟大的贡献,而且把数学用到了几乎整个物理领域.函数
以其首名研究者欧拉命名,称为欧拉函数.在数论中,对于正整数n,
是不大于n的正整数中与n互质的数的个数,例如:
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9e832badc34575009cfd40cf9c8ccc.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3d40cb0f4dfbccdd4b6dadb06588fc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3d40cb0f4dfbccdd4b6dadb06588fc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5576b0aaf839d86274acca35ea77169.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9e832badc34575009cfd40cf9c8ccc.png)
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2023-09-29更新
|
330次组卷
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4卷引用:福建省龙岩市2023届高三三月教学质量检测数学试题
福建省龙岩市2023届高三三月教学质量检测数学试题(已下线)期中考前必刷卷01-期中考点大串讲(苏教版2019必修第一册)(已下线)第三篇 努力 “争取”考点 专题1 指数函数与对数函数【练】福建省福州第二中学2023-2024学年高二上学期第二学段考试数学试题
名校
6 . 2023年8月6日2时33分,山东平原县发生里氏5.5级地震,8月8日3时28分,菏泽市牡丹区发生2.6级地震,短时间内的两次地震引起了人们对地震灾害和避险方法的关注.地震发生时会释放大量的能量,这些能量是造成地震灾害的元凶.研究表明地震释放的能量E(单位:焦耳)的常用对数与震级M之间满足线性关系,若4级地震所释放的能量为
焦耳,6级地震所释放的能量为
焦耳,则这次平原县发生的地震所释放的能量约为( )(参考数据:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c383dca4bab3a1b5c51f6a995c41fea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41178b3c1033abeb7b8544244ba9031b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aefd7b6ba5ce32d4fbfe4c98f8e1267.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd7cd0a6985af6152e8bf76af655d535.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2023-09-28更新
|
489次组卷
|
7卷引用:陕西省汉中市多校2023-2024学年高三上学期9月联考理科数学试题
2023高一·全国·专题练习
7 . 化简计算
(1)计算:
;
(2)计算:
.
(3)化简:
;
(4)计算:
.
(5)计算:
;
(6)已知
,
,试以
表示
.
(7)
;
(8)
.
(9)
;
(10)
.
(11)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79382c58525ca5fe9565731fe149c64.png)
(12)
.
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2aa64565dbb81dc0ff4450de0922d45.png)
(2)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d93110499426bd3605792a715a87cab.png)
(3)化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9214981ebe7964252d9b7cf9d81786c8.png)
(4)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72a1f813c5658125c58cfe3273b14e10.png)
(5)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd1835f3d05952a99a007d482242cb6.png)
(6)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aa7bdb806d091348063b1d6564f98b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f45d8d2f64ff58cea04e998dfefba33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13aac2585429d9a4d063644e737f629f.png)
(7)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee662b246d1256c968cdc42ee286642.png)
(8)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90a1c5e4d09169d8fac1bca34d67c91b.png)
(9)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbaf8b116808dca2cdcbe5941842507.png)
(10)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/160e23c5be315640a77cb890d3c3e32b.png)
(11)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79382c58525ca5fe9565731fe149c64.png)
(12)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e50ea68201eb6a1af68a7b53f663992e.png)
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8 . 已知
且
,
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/728b2a5b5020a06a74d4ec812aa3e2e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c97386b1f6aa2dfba6de8f16742ceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bfb5a9ba77ae3ff13997225d5ba02f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
A.27 | B.28 | C.29 | D.30 |
您最近一年使用:0次
9 . 已知声强级(单位:分贝)
,其中常数
是能够引起听觉的最弱的声强,
是实际声强.当声强级降低1分贝时,实际声强是原来的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb2f39165b5e13d5c8c426c441594a94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99778600dc72ebd434e40a50d74c1684.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023高一·全国·专题练习
10 . 计算:
(1)
;
(2)
.
(3)
;
(4)
.
(5)
;
(6)
.
(7)
;
(8)若
,求
的值.
(9)
;
(10)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bb34f7449f60c94a9890a2a6b36b934.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68ec85d1485392bb05ee040b2555aff1.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d82ae57af685dd51f06ccf19baafde.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c0a58266a9b2183716a19453050947.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb9a5eb548303a89ae328597dd545d38.png)
(6)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f69fc47e1ecdd9cacb33d6f46974fda.png)
(7)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b575a55f0cd5710828a99c35cb425dff.png)
(8)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7730288fdd66fbc6ed4a7b75ac72b58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/757eb3f55cff1e6fef064db4efae9e28.png)
(9)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/925305ac39bc9de6ba50d45885e33164.png)
(10)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d50c3fd84d4e15054f72d148fe9fe32.png)
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