1 . 对于项数为
的有穷数列
,记
,则称数列
为数列
的控制数列,如数列
的控制数列为1,3,3,5,5. 若各项都是正整数的数列
的控制数列为2,2,3,3,5.则集合
中所有元素的和等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbad6a327db8733d9622e75dff2052cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522bc03934ea5b3acadc4c02398c2d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c4e926a90b6b3b0e4cf05f10036ef01.png)
A.7.5 | B.8 | C.![]() | D.9 |
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|
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2卷引用:北京市育英学校2021-2022学年高二4月期中考试数学试题
2 . 对于一个有限数列
,
的蔡查罗和(蔡查罗是一位数学家)定义为
,其中
.若一个99项的数列(
的蔡查罗和为1000,那么100项数列
的蔡查罗和为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3751c666479b3ce370dc00e17aeca07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/275643386d3a8b5dc968b87e5d0c5d92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f12124c2ca1bbb38cec9e629ddde3699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97891aa5680112c64ae593e4ccea9d79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99df7ff763579d1442a3b45555429e48.png)
A.991 | B.992 | C.993 | D.999 |
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|
815次组卷
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6卷引用:考向17 数列新定义-备战2022年高考数学一轮复习考点微专题(上海专用)
(已下线)考向17 数列新定义-备战2022年高考数学一轮复习考点微专题(上海专用)(已下线)课时25 数列新定义-2022年高考数学一轮复习小题多维练(上海专用)(已下线)2020年高考全国2数学理高考真题变式题11-15题2015届湖北省荆门市高三元月调研考试理科数学试卷2015届湖北省荆门市高三元月调研考试文科数学试卷沪教版(上海) 高三年级 新高考辅导与训练 第四章 数列与数学归纳法 本章测试
3 . 在数列
中,
,若
(
为常数),则称
为“等差比数列”.下列是对“等差比数列”的判断:
①
不可能为
;②等差数列一定是等差比数列;
③等比数列一定是等差比数列;④等差比数列中可以有无数项为
.
其中正确的判断是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b5985d67dafea2f91cbe41dc147ab2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
③等比数列一定是等差比数列;④等差比数列中可以有无数项为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
其中正确的判断是( ).
A.①② | B.②③ | C.③④ | D.①④ |
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名校
4 . 在数列
中,对于任意
,若存在常数
,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ab36dfffd14059ffb899697b528dda6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2180f0484401566edfc1aceb4fba3dad.png)
恒成立,则称数列
为
阶数列.现给出下列三个结论:
①若
,则数列
为1阶数列;
②若
,则数列
为2阶数列;
③若
,则数列
为3阶数列;以上结论正确的序号是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1933b7c3ace69622339353431c519b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53f9a6f67a621cbce2354897d3dedfcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ab36dfffd14059ffb899697b528dda6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2180f0484401566edfc1aceb4fba3dad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45ae80811c6473aff864084ee5ce0e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e4b5779873cb3f4366dbfdb983dec81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff1c33b81ac2f065d37faef37504bb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0dd3ce757a2ad080ece0e34424fb05f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.①② | B.①③ | C.②③ | D.①②③ |
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|
634次组卷
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2卷引用:上海市延安中学2022-2023学年高二上学期第一次月考数学试题
名校
5 . 若数列{an}满足:对任意的n∈N*,只有有限个正整数m使得am<n成立,记这样的m的个数为(an)*,则得到一个新数列{(an)*}.例如,若数列{an}是1,2,3,…n,…,则数列{(an)*}是0,1,2,…,n﹣1,…已知对任意的n∈N*,an=n2,则((a4)*)*=
A.8 | B.20 | C.32 | D.16 |
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6 . 已知数列
共有
项,满足
,且对任意
有
,仍是该数列的某一项,现给出下列
个命题:
;
,(3)数列
是等差数列
集合
中共有
个元素.则其中真命题的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df0691113b206b6ccc9605838480d15e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a6c53a667b114b73a917915f01a061a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc8692a851a72427d95eac78f2efd9ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b55e05442bdfab583470b704098a38a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc63da309f74f889ea7bb31a613b476e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b49be5fb800b66cdb284b864e8f04a85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/030b0dc0c0e98e732c2e20aa0b03ed6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
A.![]() | B.![]() ![]() | C.![]() | D.![]() |
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