1 . 已知数列
满足
,
,且对
,都有
.
(1)设
,证明数列
为等差数列;
(2)求数列
的通项公式.
(3)求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7def23f30138e0b7c4c1e498d6903a6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d12d0bd9afdd4e53ff37f5bfcaa1106c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3938fc9093a10b040b5ed9d18c876637.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5653b60d16ec4e653518f0562680250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbfbfb3bd571b95bdb6a700b443119d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
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解题方法
2 . 数列
的前n项和记为
,已知
.
(1)求数列
的通项公式;
(2)求
的和.
(3)若
,则
为__________(等差/等比)数列,并证明你的结论.
![](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/445ca42e6addfb31f580bfb6a4c7e391.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dfd7c6f3ca28e0ad62b7f6a2b98cb3e.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eca70b9817c1950c54458fe949b346c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
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3 . 已知数列
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa37e5661af68b263a3ed9030d4e9003.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c6d87881d803c711b323010adb47f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa37e5661af68b263a3ed9030d4e9003.png)
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4 . 数列
满足
,
,
,
.
(1)证明:数列
为等差数列,并求数列
的通项公式;
(2)求正整数
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52d667a1cbc19a151a5223ebd69d021d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd533a2645dbbdc0e52086ddcdc65da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545027eac895de229678d6644f5ee25a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eecfd552f63963ad88d97d335131e436.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92894107bb3dab385c5cbb2cfb27a710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ff9dc01774072a70b084c35b01eb0c.png)
(2)求正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde46d2775e3ca1610036a71b30d3b85.png)
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2024-05-03更新
|
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4卷引用:重庆市第一中学校2023-2024学年高二下学期期中考试数学试题
重庆市第一中学校2023-2024学年高二下学期期中考试数学试题江西省八所重点中学2024届高三下学期4月联考数学试卷江西省八所重点中学2024届高三下学期4月联考数学试卷(已下线)第一章数列章末综合检测卷(新题型)-【帮课堂】2023-2024学年高二数学同步学与练(北师大版2019选择性必修第二册)
名校
解题方法
5 . 设数列
的前n项和
,若
,则( )
![](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/0554e9f1e77885aa6a763aa5ee60ea3f.png)
A.数列![]() ![]() | B.数列![]() |
C.![]() ![]() | D.![]() ![]() ![]() |
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解题方法
6 . 设数列
的前
项之积为
,满足
(
),则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.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/5949f4a2c72dc07dfb2ba182f674db4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2771c5f04582c545e0f9afc8a2cb9597.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afd21f4cb498101d26b4aaa2e1a6addc.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-03-21更新
|
3399次组卷
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7卷引用:福建省福州第二中学2023-2024学年高二下学期第三学段(期中)考试数学试题
7 . 已知数列
满足
.
(1)证明数列
为等差数列,并求
;
(2)求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89f143e51df4a96c7f3cdefa308d4576.png)
(1)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25cbe66fe4e84b4022721122baab4a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)求数列
![](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)
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2024-01-25更新
|
1581次组卷
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4卷引用:江苏省南京市田家炳高级中学2023-2024学年高二下学期期中考试数学试卷
江苏省南京市田家炳高级中学2023-2024学年高二下学期期中考试数学试卷广东省深圳市龙岗区2023-2024学年高二上学期1月期末质量监测数学试题广东省广州市广东实验中学2024届高三上学期第二次调研数学试题(已下线)第五章:数列(单元测试)-2023-2024学年高二数学同步精品课堂(人教B版2019选择性必修第三册)
8 . 在数列
中,
,
.
是该数列的前
项和,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be29d8f996c54183663d8a954166dc16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44e1303f3e4590fa049f10a5c5b97d8b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-12-08更新
|
1190次组卷
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6卷引用:江苏省启东市2023-2024学年高二上学期期中质量监测数学试卷
江苏省启东市2023-2024学年高二上学期期中质量监测数学试卷江苏省苏州星海实验高级中学2023-2024学年高二上学期12月月考数学试题江苏省南京市励志高级中学2023-2024学年高二上学期期末复习数学试题广东省茂名市化州市2023-2024学年高二上学期期末教学质量监测数学试题(已下线)4.2.2 等差数列的前n项和公式(分层练习)-2023-2024学年高二数学同步精品课堂(人教A版2019选择性必修第二册)(已下线)湖南省郴州市2024届高三一模数学试题变式题1-5
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解题方法
9 . 设
是等差数列
的前
项和,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c4867dfd2b1fa71e386275fe0fed234.png)
(1)证明:数列
是等差数列;
(2)当
,
时,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.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/9c4867dfd2b1fa71e386275fe0fed234.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/674b8ec980dee2fcc9f6d2682cb8e358.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/153feb9eefb9c30e54e9ae90e09f51d4.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/9948cc25ba516d3d9bdd6f5a06982db7.png)
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2023-12-06更新
|
994次组卷
|
3卷引用:江苏省泰州市联盟五校2023-2024学年高二上学期期中考试数学试卷
名校
解题方法
10 . 已知数列
、
的各项均为正数,且对任意
,都有
,
,
成等差数列,
,
,
成等比数列,且
,
.
(1)求证:数列
是等差数列;
(2)求数列
、
的通项公式.
![](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/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090426eb29836bc30c006b3739c08057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090426eb29836bc30c006b3739c08057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e95931effbd59c43e8ed1ea09962b84f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b71ef6cb9c5d494692d40a9ef279f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd9765607c4773af81f08ec33e3c402d.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b34edecf041aa8544ece5105aa4b8ec.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
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