1 . 已知等比数列
的公比
是
的等差中项.等差数列
满足
.
(1)求数列
的通项公式;
(2)将数列
与数列
的所有项按照从小到大的顺序排列成一个新的数列,求此新数列的前50项和;
(3)
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3d2c521f88b2e1ad03a90eda939d5f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14877bf6d7297f02feff3468abf01f69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9610b13d4d5873a115ac90c4de4584b.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e567d7e9761951a266953c8d5042ac.png)
(2)将数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/789be59842fe3ef5a09ff017cb55dc63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68607170e4fa90d4eb91848036839e0c.png)
您最近一年使用:0次
2 . 已知数列
中,
,
,
,数列
的前n项和为Sn.
(1)求
的通项公式;
(2)已知
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd92fa5b11d3122b96d57b1c297c0ff6.png)
(i)求数列
前n项和Tn;
(ii)证明:当
时,
.
![](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/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a31ddf0004e9750e0cfe4dc9c85e8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16b643bed0dadf52fe5d70d785a5717d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd92fa5b11d3122b96d57b1c297c0ff6.png)
(i)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(ii)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db6ccb843856cb23012a15a0e1cb113a.png)
您最近一年使用:0次
2022-05-17更新
|
1075次组卷
|
4卷引用:天津市滨海新区2022届高三下学期高考模拟数学试题
天津市滨海新区2022届高三下学期高考模拟数学试题天津市南开中学2022-2023学年高二上学期期末结课练习数学试题(已下线)2022年高考天津数学高考真题变式题10-12题(已下线)2022年高考天津数学高考真题变式题16-18题
3 . 已知数列
的前n项和为
满足
.数列
满足
,且満足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/340b1b1a139097e71ff1c4058e654ff9.png)
(1)求数列
,
的通项公式;
(2)若数列
满足
;求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5249095e0c2a28875a40a5d9c2c56bac.png)
(3)
,数列
的前
项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/330046e64d8b57b7b4e111c1518cd18b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a24e6bcf49b8e45531a2d4e4c70c181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/340b1b1a139097e71ff1c4058e654ff9.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c88a7ef007c78a93e33bd77c4396626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91eed970f6fca96c1c30f140730a4dce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5249095e0c2a28875a40a5d9c2c56bac.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae756ec767365fc5d6818cbe9318525.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bdfd33dda5a8c4814157a8f6c946cdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15526f7c892333030073b85fc3baee6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cefc1023053c7d4b36922b1e321b8b6.png)
您最近一年使用:0次
2022-05-11更新
|
1288次组卷
|
4卷引用:天津市和平区2022届高三下学期二模数学试题
4 . 已知数列
的前n项和为
,
,
.
(1)求数列
的通项公式;
(2)设
的值;
(3)设
,数列
的前n项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fc336b4a83bf6d66c4afcc431597f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d306105a4fd0926a745b0088ec054995.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6c257f35d7fec8c8f871e81228ecac.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45cb7609e7835c88fadd48e3bda90d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb0fc149b0ce469b150cc50518f7d31f.png)
您最近一年使用:0次
5 . 已知正项等差数列
与等比数列
满足
,
,且
既是
和
的等差中项,又是其等比中项.
(1)求数列
和
的通项公式;
(2)记
,其中
,求数列
的前2n项和
;
(3)令
,求证
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eab7d59ce066c8f0b346719003f8e28f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea74a5cf39bd1149aed1ce6c8ba0c895.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/161a7b35d1812e6745ae7f7c540cf87a.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ab19d5a8c560c50f98d3c740cdcce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad52924df9291d5d191d18e09374ee1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b9a0d7150fb24be3e28ef7f0e18be93.png)
(3)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf2443287aedee2d3385a27b101cbfd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e491daeb7795dcdf667cdef82a0200.png)
您最近一年使用:0次
2022-04-29更新
|
726次组卷
|
3卷引用:天津市滨海新区塘沽第一中学2022届高三下学期4月统练数学试题
6 . 已知
是等差数列,其前
项和为
,
是等比数列,且
,
,
.
(1)求数列
,
的通项公式;
(2)求
.
![](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/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85444874c705666de9488286d3d61dd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9875b5a21e007035dbf079af4617d3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3dab35b31954bc9bb43b98c0825e50.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ee5c960a8200f637fe7f3f344637d6.png)
您最近一年使用:0次
7 . 已知等比数列
的前
项和为
,公比
,
,
,数列
满足
且
,
.
(1)则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
___________ ;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414187fca31df508dbf88d7f2bb83662.png)
___________ ;
(2)将
和
中的所有项按从小到大的顺序排列组成新数列
,则数列
的前50项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d433517d14291abf6a38f29e75b691.png)
___________ ;
(3)设数列
的通项公式为:
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/581197e61c7221c2997ceb27449b5d21.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/f71acdb04454c77e1e25ad4f336cccfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f4c2d452851c386cdedf3261d9e9053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a3a7fd0728cef9ad17e2081949f7d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83432083c2c8649c9247e3d17986e84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e78f07af568e395269122824300b039.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/559304a6650e8c5043d0e9efbdcf8cfa.png)
(1)则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414187fca31df508dbf88d7f2bb83662.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d433517d14291abf6a38f29e75b691.png)
(3)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80bdb3b92120f5a996b660971ce60be5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a949b947e9961d4d68bfeb4e24ef40f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/581197e61c7221c2997ceb27449b5d21.png)
您最近一年使用:0次
名校
解题方法
8 . 设数列
的前
项和为
,且满足
.
(1)求数列
的通项公式;
(2)记
,数列
的前
项和为
,若不等式
对一切
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.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/6d55639c57bf6678bc9fd25f9123a7c6.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37df953b2c15f419c79814600628c871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbd85b79372dc6e596d465f738c3c300.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f1fa6031f0abdde7f4bc272fbcebb1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
13-14高三上·江苏南通·期中
名校
解题方法
9 . 已知数列{an}的奇数项是首项为1的等差数列,偶数项是首项为2的等比数列.数列{an}前n项和为Sn,且满足S3=a4,a3+a5=2+a4
(1)求数列{an}的通项公式;
(2)求数列{an}前2k项和S2k;
(3)在数列{an}中,是否存在连续的三项am,am+1,am+2,按原来的顺序成等差数列?若存在,求出所有满足条件的正整数m的值;若不存在,说明理由.
(1)求数列{an}的通项公式;
(2)求数列{an}前2k项和S2k;
(3)在数列{an}中,是否存在连续的三项am,am+1,am+2,按原来的顺序成等差数列?若存在,求出所有满足条件的正整数m的值;若不存在,说明理由.
您最近一年使用:0次
2022-03-29更新
|
1248次组卷
|
13卷引用:天津市宁河区芦台第一中学2020届高考二模数学试题
天津市宁河区芦台第一中学2020届高考二模数学试题(已下线)专题19 数列(解答题)-2020年高考数学母题题源解密(天津专版)天津市滨海新区2020届高三下学期毕业班质量检测(二)数学试题(已下线)天津市南开中学2022届高三下学期二模数学试题天津市耀华中学2022届高三下学期统练12数学试题(已下线)2014届江苏省启东中学高三上学期期中模拟数学试卷江苏省无锡市第一中学2018-2019学年高三上学期期初理科数学试题江苏省无锡市第一中学2018-2019学年高三上学期期初文科数学试题(已下线)考点23 数列的综合应用-备战2021年高考数学(文)一轮复习考点一遍过(已下线)押全国卷(文科)第17题 解三角形与数列-备战2022年高考数学(文)临考题号押题(全国卷)(已下线)押全国卷(理科)第17题 解三角形与数列-备战2022年高考数学(理)临考题号押题(全国卷)(已下线)专题19 数列的综合应用-3安徽省滁州市定远县育才学校2021-2022学年高二下学期第二次月考数学试题
10 . 已知数列
的前
项和为
,
,
.
(1)求
的通项公式;
(2)求数列
的前
项和
;
(3)若数列
,
,求
前
项和
.
![](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/63a26aa4cbbc507eb4743d9c52a94f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a70b95c53fb6655721e2a8c61f5c2c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b191044f5c024f377d999910b78b422.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(3)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eafbd8b1131c79cc4432978590e5923e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eff30bed4e529a661777be21f6bdd24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
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