解题方法
1 . 已知正项数列
的前
项和为
,
,且
.
(1)求数列
的通项公式;
(2)若
,求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.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/bc551a847928aca93e25096b335e9676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41be41a5a4965ebd346e7ee74d21f0f3.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/216876de04325fd250c38c485cbc34b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2022-07-15更新
|
395次组卷
|
2卷引用:四川省成都市2021-2022学年高一下学期期末数学(文科)试题
2 . 等差数列
中,若
,
,则公差d=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe7bdaaf8b0adf10bf2ef6c1255b1dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bfccbb4c53b653a16d6d56a5a4b1465.png)
A.2 | B.3 | C.4 | D.5 |
您最近一年使用:0次
2022-07-15更新
|
344次组卷
|
2卷引用:四川省成都市2021-2022学年高一下学期期末数学(理科)试题
3 . 在等差数列
中,已知
,
.
(1)求
的通项公式;
(2)设
的前n项和为
,若
,求n的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9652f65b28e2032c0cbc2a9649db4f51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0748c346ed88f98e424de8edf278325.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](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/51ec85fce82051cd8091b8c5c339518a.png)
您最近一年使用:0次
2022-07-10更新
|
398次组卷
|
3卷引用:四川省南充市2021-2022学年高一下学期期末数学(文科)试题
解题方法
4 . 在等差数列
中,
为
的前n项和.
(1)求
的通项公式;
(2)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f0a3027aee0a3dc1795a0d436971e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
名校
解题方法
5 . 已知一次函数
,数列
满足
.
(1)若
,求
;
(2)若
,求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5936a97c800eca7498061cc6c037bf88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34a3b138ee3c8fda2e4ccf4c871e11c9.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed936fac6b0ab57004ea2d957456fa1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae8aa3e510f891053e546b003d70eec2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
2022-06-25更新
|
361次组卷
|
2卷引用:四川省成都市蓉城名校联盟2021-2022学年高一下期期末联考理科数学试题
名校
解题方法
6 . 已知正项数列
的前n项和为
,且
和
满足:
.
(1)求
的通项公式;
(2)设
,求
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/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62fdc2d2b5964199bc79269ebdbeec87.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d005409790b3192705a181b2c8e7dfed.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
2022-06-24更新
|
655次组卷
|
2卷引用:四川省德阳市第五中学2021-2022学年高一下学期6月月考文科数学试题
名校
解题方法
7 . 已知数列
满足
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1cd85f1520d97a76122a10fe0bb5ffe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b93673bff1acc798a0d2d2ae87775bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d46fec35607490678a0c20c3e29b4c52.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-06-09更新
|
1301次组卷
|
8卷引用:四川省成都市蓉城名校联盟2021-2022学高一下学期期中联考理科数学试题
四川省成都市蓉城名校联盟2021-2022学高一下学期期中联考理科数学试题(已下线)4.2.1 等差数列的概念 (精讲)-【题型分类归纳】2022-2023学年高二数学同步讲与练(人教A版2019选择性必修第二册)(已下线)4.2.1.1 等差数列的概念(练习)-2022-2023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)1.2.2 等差数列与一次函数(同步练习基础版)(已下线)第2讲 等差数列的通项及性质7大题型(2)(已下线)专题4 等差数列的性质 微点1 等差数列项的性质(已下线)模块一专题1《数列基础、等差数列和等比数列》单元检测篇A基础卷(高二人教B版)(已下线)模块一 专题2《数列基础、等差数列和等比数列》单元检测篇A基础卷(高二北师大版)
名校
解题方法
8 . 已知等差数列
则数列
的前
项的和为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee575566618ecf0fa38c028e0f2be88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba57c83d526ac308d1461e80fcca9f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efba7147f5b9ced8bc4a72f0a9fb8af.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
9 . 已知
为等差数列
的前n项和,其中
,
.
(1)求
的通项公式;
(2)求
,并求
的最小值.
![](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/996787ed4f0ce8d0d41948aa3ddecd6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9182451d6e92016842a6c765f9c2d544.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
名校
10 . 在等差数列{an}中,
,则数列{an}的前11项和S11=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b562213a1e4f5cb11680aee2520f867b.png)
A.24 | B.48 | C.66 | D.132 |
您最近一年使用:0次
2022-05-21更新
|
503次组卷
|
3卷引用:四川省成都市第七中学2021-2022学年高一下学期期中数学试题