1 . 数列
中,已知
,
,若
,则数列
的前6项和为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316b5d6779890069e877f081d1833883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49f8f84f3284691766c63ba8e04486cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
名校
2 . “斐波那契数列”是数学史上一个著名数列,从第三项开始每一项都是数列中前两项之和.这个数列是斐波那契在他的《算盘书》的“兔子问题”中提出的.在问题中他假设如果一对兔子每月能生一对小兔(一雄一雌),而每对小兔在它出生后的第三个月,又能开始生小兔,如果没有死亡,由一对刚出生的小兔开始,一年后一共会有多少对兔子?即斐波那契数列
中,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d868ad8750eefd545a4344594dd982d5.png)
______ ;若
,则数列
的前
项和是_______ (用
表示).
![](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/f966272f7781790ff27e40db6b525253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b3b676b1a638ce52cc9e2dbcacc5f27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d868ad8750eefd545a4344594dd982d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/131d3913eb956dcf18c0e0abb9aa71a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2030a7c508abe4b2a03bc702cf7692d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2020-08-14更新
|
565次组卷
|
4卷引用:浙江省湖州中学2020届高三下学期高考模拟测试(一)数学试题
浙江省湖州中学2020届高三下学期高考模拟测试(一)数学试题福建省莆田市第二中学2020-2021学年高二10月阶段性检测数学试题(已下线)专题4.4 数列的求和(B卷提升篇)-2020-2021学年高二数学选择性必修第二册同步单元AB卷(新教材人教A版,浙江专用)(已下线)专题17 盘点数列与其它知识交汇问题——备战2022年高考数学二轮复习常考点专题突破
名校
解题方法
3 . 已知数列{an}满足:an
(n∈N*).若正整数k(k≥5)使得a12+a22+…+ak2=a1a2…ak成立,则k=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d5164f6845b09c056406ee29cba51e.png)
A.16 | B.17 | C.18 | D.19 |
您最近一年使用:0次
2020-06-12更新
|
187次组卷
|
6卷引用:2020届浙江省温州市普通高中高三下学期4月高考适应性测试数学试题
2020届浙江省温州市普通高中高三下学期4月高考适应性测试数学试题浙江省绍兴市诸暨中学2019-2020学年高二(实验班)下学期期中数学试题(已下线)考点20 数列的综合运用-2021年高考数学三年真题与两年模拟考点分类解读(新高考地区专用)广西桂林市第十八中学2020-2021学年高二上学期第一次阶段性考试数学(理)试题广西桂林市第十八中学2020-2021学年高二上学期第一次阶段性考试数学(文)试题(已下线)【练】专题5 分段数列问题
4 . 已知数列
满足,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05f0e2054a1af4af45297300e12d1abf.png)
,若
且记数列
的前
项和为
,若
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05f0e2054a1af4af45297300e12d1abf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dc159f2cf773084fdd4bb31c0066133.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1ec7b3f23a0b8ada8dca388e94b353.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/01888ab684997b1c6fc19e2992bb9536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/453e398c6f4b0f5247906161e084ed2d.png)
A.![]() | B.3028 | C.![]() | D.3029 |
您最近一年使用:0次
解题方法
5 . 已知有穷数列
共有
项(整数
),首项
,设该数列的前
项和为
,且
,其中常数
.
(Ⅰ)求证:数列
为等比数列;
(Ⅱ)若
,数列
满足
,求
的和(用
表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5631bc01b998a4b3fabd9e131699dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbeaed9ec21e090defafcfeefe0059c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.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/921101da86f17e4f4b6d254ca51fde3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
(Ⅰ)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57def6b0c89b6f806344696963162289.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a81a4d5c42a5fe3aa2fe43774bcafac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9da5be3f28f79bf2b371ef4592b998ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
解题方法
6 . 已知正项数列
的前n项和为
,且满足
,
.
(1)求数列
的通项公式;
(2)若
,
,求数列
的前
项和
.
![](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/bc955b40850fcc89afdbd9bbe8908b78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b2d40341f94147ea5d440cc9989c97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e04c1c8802cebbce541dee8f14d9bf1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec59c4ce1bf77f889bd0afab6dbfb62c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
7 . 已知数列
满足
,且
前2014项的和为403,则数列
的前2014项的和为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a1bf4b33b4b6ee90f2df148f5e48272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d185b833d4c128fdb2916212516abe6b.png)
A.![]() | B.![]() | C.2 | D.4 |
您最近一年使用:0次
8 . 已知数列
,
的前
项和分别为
,
,且
,
.
(1)求数列
,
的通项公式;
(2)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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3cad833761a023a29697f8e25b69320.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34b5d3c44665c60eeaeabbb6b0911561.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/838e64ea7953d16dd4bb63830f276879.png)
您最近一年使用:0次
9 . 已知数列
满足
,数列
的前
项和为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a114fb18d79d37f3b966e25a4b21fbca.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)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
10 . 已知数列
的前
项和为
,且
,数列
为等差数列
,
.
(1)求
,
的通项公式;
(2)记
,求数列
的前
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/c8370a173854471a3eb27637993a3d5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faf7a55adfc17a47503011a5feb395c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d17ddcb9d7a3e0c70c923e6819ff3a8d.png)
(1)求
![](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/831de7531e4b51f836a5ef44c4791198.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0010f17f7ae1fd17f739fea53f76083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2020-04-12更新
|
802次组卷
|
3卷引用:浙江省百校联考2018-2019学年高三5月高仿真模拟数学试题
浙江省百校联考2018-2019学年高三5月高仿真模拟数学试题江苏省泰州市姜堰中学2020-2021学年高二上学期阶段测试一数学试题(已下线)拓展二 数列求和的方法(精练)-2020-2021学年一隅三反系列之高二数学新教材选择性必修第二册(人教A版)