1 . 若无穷项数列
满足
(
,
,
为常数,
且
),则称数列
为“
数列”.
(1)设
,
,若首项为1的数列
为“
数列”,求
;
(2)若首项为1的等比数列
为“
数列”,求数列
的通项公式及前
项和
;
(3)设
,
,若首项为1的数列
为“
数列”,记数列
的前
项和为
,求所有满足
的
值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02dd516c6150338de0c0183a576217c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e463157fe32537671ad929c398103290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d438267fddcd02afff8e73c6c3fec8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5dc99a0493caf8b65827518c965e8a.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae3012337aa392709349731fb1eef5b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfa9bf65189dfb57a61644a1cb27f361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51a1c58fe791309a649f12863383996.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f11075f2c574b6c59b97fb3038000e38.png)
(2)若首项为1的等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5dc99a0493caf8b65827518c965e8a.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/08eb71ecf8d733b6932f4680874dbbf3.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae3012337aa392709349731fb1eef5b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d9b6c86435e0ceff94d8ad1cd03737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d56d39424b5e536e241bfc07e37f299b.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/320d090d0fe9a8b11b087cadc249ade2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
解题方法
2 . 已知数列
:0,2,0,2,0,现按规则
:每个0都变为“2,0,2”,每个2都变为“0,2,0”对该数列进行变换,得到一个新数列,记数列
,
,则数列
的项数为________ ,设
的所有项的和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c88abd936125401c8d7e3bc21f4396.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4ff0af96ea467337cb30c4c765b5f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ade39917930a1e712e7df8e81109c29b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83a6bc55d5eb2c3d085b62ffcd8d138d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc31dcdb99754fc452ff2b92a2fb8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc31dcdb99754fc452ff2b92a2fb8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c88abd936125401c8d7e3bc21f4396.png)
您最近一年使用:0次
名校
解题方法
3 . 设数列
的前
项和为
,若
,则
( )
![](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/abe7d64bb88ab1c7b58b9c5552c9ddcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bb7147e313f9d9f67d19ecb5f499c05.png)
A.65 | B.127 | C.129 | D.255 |
您最近一年使用:0次
2024-05-13更新
|
1509次组卷
|
3卷引用:广东省惠州市惠阳区丰湖高级中学2023-2024学年高二下学期5月月考数学试卷
广东省惠州市惠阳区丰湖高级中学2023-2024学年高二下学期5月月考数学试卷江苏省南通、扬州、泰州七市2024届高三第三次调研测试数学试题(已下线)专题07 数列通项公式与数列求和--高二期末考点大串讲(人教B版2019选择性必修第三册)
解题方法
4 . 随着信息技术的快速发展,离散数学的应用越来越广泛.差分和差分方程是描述离散变量变化的重要工具,并且有广泛的应用.对于数列
,规定
为数列
的一阶差分数列,其中
,规定
为数列
的二阶差分数列,其中
.
(1)数列
的通项公式为
,试判断数列
,
是否为等差数列,请说明理由?
(2)数列
是以1为公差的等差数列,且
,对于任意的
,都存在
,使得
,求a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f9d7c0929c0b60ceba9d0b9b64c180.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6558223c3276e691c569a665b9ac5d08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3303b7851bc1329239566cdb9554c11d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a58369f89785d6f30ca587d94885164.png)
(1)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5f0cb87026446fc3c0b594456f90958.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f9d7c0929c0b60ceba9d0b9b64c180.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3303b7851bc1329239566cdb9554c11d.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/564f11155dfe024399b94ef16e117d09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6455e38ff53ede2508e4d9cb23f0b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7905fd422e78a1d22ff6f11950bc5cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e17c6f947ef4bbf3358157fb082337.png)
您最近一年使用:0次
名校
解题方法
5 . 已知数列
为等比数列,且
,
,设等差数列
的前n项和为
,若
,则
( )
![](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/5a37c2ec7c09f42c1a255cf19057f8a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ded779955460cd2e08a4574bd5646dd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4e70b360f988fdbd92300ab22c4613.png)
A.-36或36 | B.-36 | C.36 | D.18 |
您最近一年使用:0次
2024-03-27更新
|
1870次组卷
|
8卷引用:广东省珠海市六校2023-2024学年高二下学期4月期中考试数学试题
名校
解题方法
6 . 已知数列
满足
,则“
”是“
是等比数列”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57bfc1f8772f31748bfdc280d0712fc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe7bdaaf8b0adf10bf2ef6c1255b1dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
2024-03-14更新
|
1599次组卷
|
8卷引用:广东省广州市第六中学2023-2024学年高二下学期3月测验数学试题
广东省广州市第六中学2023-2024学年高二下学期3月测验数学试题山东省聊城市2024届高考模拟数学试题(一)(已下线)1.2 常用逻辑用语(十年高考)(已下线)1.2 常用逻辑用语(高考真题素材之十年高考)河南省焦作市博爱县第一中学2024届高三下学期4月月考数学试题山东省淄博市沂源县第二中学2023-2024学年高二下学期4月月考数学试题吉林省通化市梅河口市第五中学奥赛班2023-2024学年高二下学期4月月考数学试题(已下线)专题06 等差数列与等比数列(2)--高二期末考点大串讲(人教B版2019选择性必修第二册)
7 . 在数列
中,
,且
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1bae03ee4ac75dacfb026290e4207dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/807e43d384d24f1017e19f6c1648b10f.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2024-03-10更新
|
1253次组卷
|
4卷引用:广东省佛山市三水区华侨中学2023-2024学年高二下学期第一次测试数学试卷
广东省佛山市三水区华侨中学2023-2024学年高二下学期第一次测试数学试卷广西百所名校2023-2024学年高二下学期入学联合检测数学试题江西省部分学校2023-2024学年高二下学期3月月考数学试题(九省联考新题型)(已下线)专题3 复杂递推及斐波那契数列相关二阶递推问题【练】(高二期末压轴专项)
名校
8 . 在数列
中,若存在常数
,使得
恒成立,则称数列
为“
数列”.
(1)若
,试判断数列
是否为“
数列”,请说明理由;
(2)若数列
为“
数列”,且
,数列
为等比数列,且
,求数列
的通项公式;
(3)若正项数列
为“
数列”,且
,
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8158441521b4c35044b2c27b0df96d19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e93815f534a9ba003799aef2a53a242.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075f4a124ee7f174909a106a94f5ad42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e93815f534a9ba003799aef2a53a242.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e93815f534a9ba003799aef2a53a242.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/196c99381f37d23ce5c7ba450d98330b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(3)若正项数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e93815f534a9ba003799aef2a53a242.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8141d87fb02b08c88b0c9f27f839a7d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eb4bba6777941fbf01de6094c3ff21d.png)
您最近一年使用:0次
2024-03-06更新
|
1618次组卷
|
5卷引用:广东省2024届高三数学新改革适应性训练五(九省联考题型)
解题方法
9 . 在数列
中,
,且
,则
的通项公式为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52c5d5ddcc1aa616d9173af4e290d88e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
名校
解题方法
10 . 已知数列
的前
项和为
,满足
.
(1)求
的通项公式;
(2)删去数列
的第
项(其中
),将剩余的项按从小到大的顺序排成新数列
,设
的前
项和为
,请写出
的前6项,并求出
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/c8370a173854471a3eb27637993a3d5d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)删去数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/198ac4d89d3a63818ebe78129a974a37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c00a1d9b51819d0782cc4414cebb060b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9b647ac8a8174071a4f332a00b5507b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbd85b79372dc6e596d465f738c3c300.png)
您最近一年使用:0次
2024-02-12更新
|
197次组卷
|
4卷引用:广东省广州市广东实验中学越秀学校2023-2024学年高二下学期期中考试数学试题
广东省广州市广东实验中学越秀学校2023-2024学年高二下学期期中考试数学试题福建省漳州市2023-2024学年高二上学期1月期末数学试题(已下线)高二下学期期中考试(范围:数列、导数、计数原理)-2023-2024学年高二数学下学期重难点突破及混淆易错规避(人教A版2019)黑龙江省哈尔滨市第十一中学校2023-2024学年高二下学期期中考试数学试题