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1 . (1)已知:有理数都能表示成
(
,且
,
与
互质)的形式,进而有理数集
,且
,
与
互质
.
证明:(i)
是有理数.
(ii)
是无理数.
(2)已知各项均为正数的两个数列
和
满足:
,
.设
,
,且
是等比数列,求
和
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0be44077d42cfffece905b1af13e000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e040fd7ed69d64faa73e837de9cf34da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59b2400d72b1e3145cb21ba719d8a968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f78fafccf5b7f9a2274588a3e0d53e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59b2400d72b1e3145cb21ba719d8a968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167efd4154b88cb7d4f98a60db23b7f5.png)
证明:(i)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a78c6231e3700c9318da26652ffc3b4e.png)
(ii)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
(2)已知各项均为正数的两个数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d29b427b203f5a022e32ed32e22e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cca1d86c9f078347773f700fee49d1d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7448f80a323b18d9071aafd1843d76b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cca1d86c9f078347773f700fee49d1d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
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2卷引用:广东省中山市第一中学2024届高三上学期第五次统测数学试题
名校
2 . 已知
,则
与
的大小关系是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d1538a5a7341f9b2e87669c697e01a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d585cfcf8c6c0feb7f08c42524300c33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a7ac09ea61d62cc2c822b009f8b393e.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
3 . 圆柱
高为1,下底面圆
的直径
长为2,
是圆柱
的一条母线,点
分别在上、下底面内(包含边界),下列说法正确的有( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192f4f9446c954a291f779d963f90257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192f4f9446c954a291f779d963f90257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
A.若![]() ![]() |
B.若直线![]() ![]() ![]() ![]() |
C.存在唯一的一组点![]() ![]() |
D.![]() ![]() |
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3卷引用:山东省济南市山东省实验中学2024届高三上学期第三次诊断考试数学试题
解题方法
4 . 已知
为正实数,以下不等式成立的有( )
①
;②
;③
;④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e865d4862a4f9e3fa27cc51634bc6d06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d700a4bce2e713000e7badb883efb3f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172541b11ef1b4de25c987198eefc80b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21c0a9d13eca2773e90da669ea4ed92d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e865d4862a4f9e3fa27cc51634bc6d06.png)
A.②④ | B.②③ | C.②③④ | D.①④ |
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3卷引用:河南省南阳市基础年级联合体2022-2023学年高一上学期12月月考数学试题
名校
解题方法
5 . (1)设
,试比较
和
的大小.
(2)求证:当
时,不等式
成立,当且仅当
等号成立,据此求
的最大值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d229cbec798c9c278a9b5979cb38247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69f23db69bdc68433d2db9590fe60550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40901c6ecbde629a554f58db9c0cc677.png)
(2)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8674e0c29d69918736b83bdc8288dc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb2e31608320e989afeeed9a7a8482d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f22fec5a381ae8aca93d876e54c79de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/938babc8d8adcabe08f196ef63a36e10.png)
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6 .
(1)苏教版《普通中学教科书数学必修第一册》第70页第16题可得出以下基本不等式:当
,
时,
(当且仅当
时,等号成立).试用上述结论证明:当
时,
;
(2)如图,锐角
(单位为弧度)的终边与单位圆交于点
,作
轴于点
.
![](https://img.xkw.com/dksih/QBM/2022/4/11/2955971972710400/2957941185773568/STEM/fda1db2c-afa0-4d09-9fa7-934c2a8acdf0.png?resizew=212)
(i)利用单位圆与三角函数线证明:当
时,
;
(ii)求
的周长与面积之和的取值范围.
(1)苏教版《普通中学教科书数学必修第一册》第70页第16题可得出以下基本不等式:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b603108c964254b841b9058ffd60ee3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f22fec5a381ae8aca93d876e54c79de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6eec7d75a66a4407631f75320bb8b15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae3371f6c2f0038a239e47a6d72a435.png)
(2)如图,锐角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3a3db6d96518255f96ad7fc1ac98f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/2022/4/11/2955971972710400/2957941185773568/STEM/fda1db2c-afa0-4d09-9fa7-934c2a8acdf0.png?resizew=212)
(i)利用单位圆与三角函数线证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6eec7d75a66a4407631f75320bb8b15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fba65bdcf4f2f04f800a496618888f6e.png)
(ii)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c56b0348213284a19e2acc5a088fa491.png)
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解题方法
7 . 已知
为正实数,利用平均不等式证明(1)(2)并指出等号成立条件,然后解决(3)中的实际问题.
(1)请根据基本不等式
(
),证明:
;
(2)请利用(1)的结论,证明:
;
(3)如图,将边长为1米的正方形硬纸板,在它的四个角各减去一个小正方形后,在这层一个无盖纸盒.如果要使制作的盒子容积最大,那么剪去的小正方形的边长应为多少米?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d10449bc77d692a7270e0f20a68cdf2.png)
(1)请根据基本不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/689f982af451283289255c87593ec338.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3c270c7508ec18bfae26af47763aab7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e17f1b7e916807416bb2941b0788fe7.png)
(2)请利用(1)的结论,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c169995b2eaa06bef72f45dc41f134ce.png)
(3)如图,将边长为1米的正方形硬纸板,在它的四个角各减去一个小正方形后,在这层一个无盖纸盒.如果要使制作的盒子容积最大,那么剪去的小正方形的边长应为多少米?
![](https://img.xkw.com/dksih/QBM/2021/9/21/2812835216646144/2814555843821568/STEM/e4a74bf0-8094-45d2-886c-d915171dc433.png?resizew=532)
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8 . 若
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b08899338c9f2c44ebdef85362464982.png)
A.命题“![]() ![]() |
B.![]() |
C.若a+2b=2,则![]() |
D.“幂函数![]() ![]() ![]() |
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2021-07-26更新
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2卷引用:重庆市第一中学2021届高三下学期第二次月考数学试题