1 . 已知
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3830c962a99ad42a82cc6327a79cc592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5921d5addb93829e146437d4058da5f6.png)
您最近一年使用:0次
2020-02-05更新
|
251次组卷
|
3卷引用:人教B版(2019) 必修第二册 逆袭之路 第五章 5.1 统计 小结
2 . 某农场规划将果树种在正方形的场地内.为了保护果树不被风吹,决定在果树的周围种松树. 在下图里,你可以看到规划种植果树的列数(n),果树数量及松树数量的规律:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/793a4370-bcd3-4cbd-9b28-9baa24070c72.png?resizew=294)
(1)按此规律,n = 5时果树数量及松树数量分别为多少;并写出果树数量
,及松树数量
关于n的表达式
(2)定义:
为
增加的速度;现农场想扩大种植面积,问:哪种树增加的速度会更快?并说明理由
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/793a4370-bcd3-4cbd-9b28-9baa24070c72.png?resizew=294)
(1)按此规律,n = 5时果树数量及松树数量分别为多少;并写出果树数量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
(2)定义:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1a8103de4f1b59bf3b9ce8b5b748f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9fc82353331abee0828dee9b38c08f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d4fc8faefb26b233d4aa9dbef043aae.png)
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2020-02-01更新
|
254次组卷
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3卷引用:2016届上海市杨浦区高三上学期期末“3+1”质量调研(文)数学试题
2016届上海市杨浦区高三上学期期末“3+1”质量调研(文)数学试题2016届上海市杨浦区高三上学期期末“3+1”质量调研(理)数学试题(已下线)2.1.1 合情推理-2020-2021学年高二数学(理)课时同步练(人教A版选修2-2)
名校
3 . 已知数列
:
,
,
,
(
),与数列
:
,
,
,
,
(
),记
.
(1)若
,求
的值;
(2)求
的表达式;
(3)已知
,且存在正整数
,使得在
中有4项为100,求
的值,并指出哪4项为100.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a845e3442d04b024fc5645e364436e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194f644d156cfa364378e6cb1796073b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f21c4ccfd9eedc8a68499843e255004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d28fc397ca5e79e5a9e5d7aeba25725d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004c1df7814646f1c2d0243759d14511.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bb85b9cc92f8407f658b510e21b1fac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e5a9ac8bc15b674e6301c17aa09d960.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d12967e586774dedeb0bcb30939a994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a29f23b3b5ea592bb7b99c2828b7ebc0.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ba6b6aa6c3f9faba6b03bc193a6e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88abc4ce6f29684af93807ff4c9f13bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
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名校
4 . 已知数列
满足
,
,
,则(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e13ae090c17aef5ef46149b11ed5645.png)
________ ,
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78af69eebd4edf69c555801f9f3a2343.png)
_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d2e7c1610454b53c92a1520e12e694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e13ae090c17aef5ef46149b11ed5645.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78af69eebd4edf69c555801f9f3a2343.png)
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2020-01-08更新
|
423次组卷
|
3卷引用:湖南省长沙市浏阳市第一中学2019-2020学年高三上学期第六次月考数学(理)试题
湖南省长沙市浏阳市第一中学2019-2020学年高三上学期第六次月考数学(理)试题湖南省衡阳市第八中学2019-2020学年高三上学期第六次月考数学(理)试题(已下线)专题02 数列(第二篇)-备战2020高考数学黄金30题系列之压轴题(新课标版)
5 . 已知以区间
上的整数为分子,以
为分母的数组成集合
,其所有元素的和为
;以区间
上的整数为分子,以
为分母组成不属于集合
的数组成集合
,其所有元素的和为
;……依此类推以区间
上的整数为分子,以
为分母组成不属于
,
…
的数组成集合
,其所有元素的和为
,若数列
前
项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27419232c006953978891b764088242.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afa482d7bcaa385bfc3548b42a4bfb60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c4a78392f9a74092128226c25bd10f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ad4668cc927e277289b2af718f0d91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1fc328c7e3f983fd08f35ac1359a975.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f31971306914638e5ceb1bbe437535d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94ea50db79b18d8700cfa2559ff5e2d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27419232c006953978891b764088242.png)
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2019-12-28更新
|
286次组卷
|
4卷引用:吉林省长春六中、八中、十一中等省重点中学2019-2020学年高三12月联考数学(理)试题
6 . 已知数列{an}满足a1=1,an+1=lnan+
+1,记Sn=[a1]+ [a2]+···+[an],[t]表示不超过t的最大整数,则S2019的值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b7e761be88728b3db50c2abd4377c12.png)
A.2019 | B.2018 | C.4038 | D.4037 |
您最近一年使用:0次
2019-12-16更新
|
2384次组卷
|
3卷引用:2019年11月北京市清华大学中学生标准学术能力诊断性测试测试数学(理)试题(二卷)
名校
7 . 数列
的前
项
组成集合
,从集合
中任取
个数,其所有可能的
个数的乘积的和为(若只取一个数,规定乘积为此数本身),记
,例如当
时,
;当
时,
,试写出![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
___
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892594f76003fb517971c6c54e311d83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95ae97277e86368540995908ef97fdcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e1bb634344ace9d9401140d0fa08501.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14ec068789dec765142a8a599ded82ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d54334701399edc7fed8d1606f4210b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b351f16728b0023fd63678f8103c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c5c1887410b5734f4bee7bf94a41d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2d3df37e73a8abea815f37dbb3fff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c14ab22d2215e9bc9011b57356bdf7a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
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8 . 已知等差数列
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71db65dd91927bf788d468bb0ed65569.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df60d284d7587442ed868985cbcde322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71db65dd91927bf788d468bb0ed65569.png)
您最近一年使用:0次
名校
9 . 设
,用
,表示所有形如
的正整数集合,其中
且
,
为集合
中的所有元素之和,则
的通项公式为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414187fca31df508dbf88d7f2bb83662.png)
_______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f39982e0dbd96546808e7b6e76ce16ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fce48edaa26dd12e7237d101ff163f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc73442fcbd311d8d64cb2a334eee62a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414187fca31df508dbf88d7f2bb83662.png)
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10 . 设
阶方阵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c44bd287396aef291b713740d6f7b5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a71eb78c4b52d48fb32543957f9a20f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a96393e49d1c1398b18d3ec5d28b4660.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84af678782760ada57490afef0cef029.png)
任取
中的一个元素,记为
划去
所在的行和列,将剩下的元素按原来的位置关系组成
阶方阵,任取
中的一个元素,记为
划去
所在的行和列,将剩下的元素按原来的位置关系组成
阶方阵,…,将最后剩下的一个元素记为
记
则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbcb1d1a44052a89f57eb3bb47fd0046.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c44bd287396aef291b713740d6f7b5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a71eb78c4b52d48fb32543957f9a20f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a96393e49d1c1398b18d3ec5d28b4660.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84af678782760ada57490afef0cef029.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f6332545a3a8c6ab4563255fb62efc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f242e3e106bf19364bf8f3e0525b9171.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aadf9ab510510120699c5eee39ab18b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94ea50db79b18d8700cfa2559ff5e2d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc58465193457739c5c4669cb4a4ff1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a1271285428c740905f7d5db68c5dc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65faea485e0be1ee91426d34d9b44c7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff6b38b50f2e7686d57974fb7b9d54b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbcb1d1a44052a89f57eb3bb47fd0046.png)
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