解题方法
1 . 已知正项数列
满足
,数列
的前
项和为
,且
,
.
(1)求
,
的通项公式;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/754fab8d21931dadc416bec9d0372322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.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/24c875cd222d7709a35d2cc9835643da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c5a7a17a394e868e0acd1803a9ab795.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2eda366e9adce76a1811abd7562e3f4.png)
您最近一年使用:0次
名校
2 . 若数列
满足
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69c7266d90661cf4467f13c6f5eb670c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9cff1a9ceaafab92feca53e701b150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bbc12ecb6d1d18f4a7ae777bde43d27.png)
A.![]() | B.11 | C.![]() | D.![]() |
您最近一年使用:0次
2024-01-28更新
|
1390次组卷
|
6卷引用:山西省忻州市2023-2024学年高二上学期1月期末考试数学试题
3 . 已知数列的前4项分别为
,
,
,
,则该数列的一个通项公式可以为
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaee83f1b44528e034d496715c3f666d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1e1729d89f77f32a8a5c3c453fb6f00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4262516dd805d88f1a05482200052989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d4bafdffcd4d540ffc1b05aa34de8d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
您最近一年使用:0次
2024-01-28更新
|
222次组卷
|
3卷引用:山西省忻州市2023-2024学年高二上学期1月期末考试数学试题
解题方法
4 . 已知数列
的前
项和为
,且
.
(1)求
的通项公式;
(2)设
,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/bd5d2e9e3e5f1d35a6af7f7156413439.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d81b57d696441836b63b25b2547b92d1.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)
您最近一年使用:0次
2024-01-28更新
|
669次组卷
|
3卷引用:山西省忻州市2023-2024学年高二上学期1月期末考试数学试题
名校
解题方法
5 . 在数列
与
中,已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c11f6b8beb3df4ee182ab3f7ae9fb18.png)
________ .
![](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/f1d7a36623102c0f30efaffbfa625b52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c11f6b8beb3df4ee182ab3f7ae9fb18.png)
您最近一年使用:0次
2024-01-23更新
|
367次组卷
|
5卷引用:山西省忻州市2023-2024学年高二上学期1月期末考试数学试题
山西省忻州市2023-2024学年高二上学期1月期末考试数学试题内蒙古赤峰市松山区赤峰学院附属中学2023-2024学年高二上学期1月期末数学试题广东省广州市第六中学2024届高三第二次调研数学试题河北省承德市2023-2024学年高二上学期期末数学试题(已下线)上海市高二数学下学期期末模拟试卷03--高二期末考点大串讲(沪教版2020选修)