名校
解题方法
1 . 设数列
的前n项和为
,且
,
,则数列
的前10项和是( )
![](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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe97dafa0c3ac9d89f0fa7ad0899ce2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52cf314dfbf0f31f0d03c2c1b96cdd5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-08-31更新
|
1938次组卷
|
6卷引用:天津市南开中学2022-2023学年高三上学期统练5数学试题
2 . 若函数
,则称f(x)为数列
的“伴生函数”,已知数列
的“伴生函数”为
,
,则数列
的前n项和
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cfb19f0c37a72b33083ae9319f11a74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d01cb00904ee16178c7c35d7e0a8d3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0496f142d8ae5acb06e83526eaa3ef87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7978d7bd6f6caf9ac9837ffce5f89654.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2022-03-18更新
|
525次组卷
|
3卷引用:天津市天津中学2022-2023学年高二上学期期末数学试题
名校
解题方法
3 . 已知数列
的前
项和
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c3748e4a742ec1f71338e1ad47cf458.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/43066108082296d5df1fa53049de16e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c3748e4a742ec1f71338e1ad47cf458.png)
您最近一年使用:0次
2022-01-18更新
|
709次组卷
|
2卷引用:天津市第二十五中学2022-2023学年高二上学期期末数学试题
解题方法
4 . 已知数列
的前n项的和为
,且
,其中
.
(1)求数列
的通项公式;
(2)若数列
满足
,求数列
的前n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/90338929d4fee67822c33c01b2a3d3bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed97a2706595b8053e24a461664a4524.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8466c7b7d1851c33724e18483a6576f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次