名校
解题方法
1 . 已知数列
中,
,
,且满足
.
(1)设
,证明:
是等差数列;
(2)若
,求数列
的前n项和
.
![](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/2693734765399876e9e93cdb110231c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d44a346ed00e241760cbabc648a3ffe.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/808e99829d4d67f8586422ed5e7d4dbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d32f45f1cd958a22a8d17b3b523a9b3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
2022-04-21更新
|
1474次组卷
|
4卷引用:天津市第三中学2022届高三下学期一模数学试题
天津市第三中学2022届高三下学期一模数学试题(已下线)押新高考第18题 数列-备战2022年高考数学临考题号押题(新高考专用)2022届辽宁省沈阳市东北育才学校高中部高三下学期高考适应性练习(最后一模)数学试卷2023版 湘教版(2019) 选修第一册 过关斩将 第1章 专题强化练4 数列求和
2 . 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
3 . 已知数列
的前
项和
,
,数列
的前
项和为
.
(1)求数列
的通项公式;
(2)设
,求数列
的前
项和
;
(3)证明:
.
![](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/262ccbb37f4421f46171c79f046df1a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bb9104ef93ea72c2eaa880b3c59b39b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36708ae3610a5ea4e4a399bed1077679.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc31dcdb99754fc452ff2b92a2fb8c9.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/818f4d7f267c1cdc2d228699f4422d05.png)
您最近一年使用:0次
2022-04-19更新
|
903次组卷
|
2卷引用:天津市新华中学2022届高三下学期4月统练数学试题
名校
解题方法
4 . 北京天坛圜丘坛的地面由石板铺成,最中间的是圆形的天心石,围绕天心石的是9圈扇环形的石板,从内到外各圈的石板数依次为
,
,
,…,
,设数列
为等差数列,它的前n项和为
,且
,
,则
( )
![](https://img.xkw.com/dksih/QBM/2022/4/15/2958580988510208/2961371128455168/STEM/1fff355ed6674936b772cb53af0632d6.png?resizew=257)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc858b7a95c5006a44067022da09f667.png)
![](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/039e449a6d9e76e0497bf2672740f801.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b9eba619fd20aa0f1b94f439e8c6fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4e70b360f988fdbd92300ab22c4613.png)
![](https://img.xkw.com/dksih/QBM/2022/4/15/2958580988510208/2961371128455168/STEM/1fff355ed6674936b772cb53af0632d6.png?resizew=257)
A.189 | B.252 |
C.324 | D.405 |
您最近一年使用:0次
名校
解题方法
5 . 在
中,内角
、
、
所对各边分别为
、
、
,角
、
、
的度数成等差数列,
.
(1)若
,求
的值;
(2)求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf2d3c6d20ec680b233344a0be893ef4.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b0de3123425bce7223fc3be10c8088f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd1810555c0c28fe352841322b85bbc6.png)
您最近一年使用:0次
6 . 在数列
中,
,其中
.
(1)证明数列
是等差数列,并写出证明过程;
(2)设
,数列
的前n项和为
,求
;
(3)已知当
且
时,
,其中
,求满足等式
的所有n的值之和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/285c2cbe744d4053d480ce76b8369ab0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
(1)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa535e9d1bf7d2b42d022aace307f284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c88a7ef007c78a93e33bd77c4396626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(3)已知当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a70b95c53fb6655721e2a8c61f5c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/831608f09609c37f757f5bfcd01253f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb29441c2acd6cbc81fd061af1274f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c31b6c06a0a78270a411147ac4765850.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbd3611e4bb799f41a63fa1febe5a8f.png)
您最近一年使用:0次
解题方法
7 . 已知
和
均为等差数列,
,
,
,记
,
,…,
(n=1,2,3,…),其中
,
,
,
表示
,
,
,
这
个数中最大的数.
(1)计算
,
,
,猜想数列
的通项公式并证明;
(2)设数列
的前n项和为
,若
对任意
恒成立,求偶数m的值.
![](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/ebaf2a2590bb84d646957f913d78f6dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd8f08a2e3a40cc2fb680104133df13a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4602c763b6896b76ec80c73cbb6b0126.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075255ba5f02900e250ff61f7491dc5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f40db3e0b43d3e92b807827c1612f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d294754430977273da149a8ea6c345da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a202bda83f2640744337ee18ad45dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a47d46ba3cddd9ba7e79b8d0369592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/637f94c79ddadc15f305bed8adc45733.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
(1)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7936359df4c926b72b48c6fdae55f12d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76f79be89b8c6227b68eded6b675546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db84454f051d418a4904fa423ab8b304.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0909e967ae83425ea3b319bc25b3ad34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bd32114b6a51df290934bce11b6e255.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97769855336d73371930df1f187875e.png)
您最近一年使用:0次
2022-04-08更新
|
879次组卷
|
3卷引用:天津市津衡高级中学2022届高三下学期4月月考数学试题
8 . 已知数列
是等比数列,数列
满足对
,且
.
(1)求数列
和
通项公式;
(2)若数列
的前
项和为
,求证:
;
(3)对任意的正整数
,设数列
求
.
![](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/378be6d60e420d6c4ede9fc4b8108dd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4694543de081b3dc193ec0ec1707258d.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfccc89f83f2af31049391057c8f525d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c857b86f18a54fcef542574deeca4a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ab3b747e31fd1f95af4961b7b6a8bd.png)
(3)对任意的正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eadf9ce5024edb1f2d765599deec2128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15f64fbbdf5e886b091e597c7c18b4ce.png)
您最近一年使用:0次
9 . 某中学的“希望工程”募捐小组暑假期间走上街头进行了一次募捐活动,共收到捐款1200元.他们第1天只得到10元,之后采取了积极措施,从第2天起,每一天收到的捐款都比前一天多10元.这次募捐活动一共进行的天数为( )
A.13 | B.14 | C.15 | D.16 |
您最近一年使用:0次
10 . 记
为等差数列{
}的前n项和,若
,
,则
=_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d8e8f821111de8075e5c3dfb22a5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52ff4f2d9a76730a7ff5baf43da46f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc858b7a95c5006a44067022da09f667.png)
您最近一年使用:0次
2022-03-31更新
|
1080次组卷
|
4卷引用:天津市部分区2021-2022学年高二上学期期末数学试题
天津市部分区2021-2022学年高二上学期期末数学试题上海市金山区2021-2022学年高二下学期期中数学试题(已下线)高二数学下学期期末精选50题(基础版)-2021-2022学年高二数学考试满分全攻略(人教A版2019选修第二册+第三册)(已下线)核心考点06数列-【满分全攻略】2022-2023学年高二数学下学期核心考点+重难点讲练与测试(沪教版2020选修一+选修二)