名校
解题方法
1 . 已知数列
的前
项和为
,
,且
.
(1)求数列
的通项公式,
(2)设数列
满足
(
),求数列
的前
项和为
![](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/9f0a53b6755b419e78cb64cc193ce826.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b95075b1cf010840f146323f5e84678.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77ea51e5f2ca6a08d5aaadaf7abd4101.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.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)
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2022-12-31更新
|
1758次组卷
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3卷引用:福建师范大学附属中学2023届高三上学期第二次月考数学试题
名校
解题方法
2 . 已知正项数列
,
的前n项和为
,且
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ebce85ea9bc18815ef8887057030a63.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bba253fcf8aebd9ffb03e6d7fd93e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ebce85ea9bc18815ef8887057030a63.png)
您最近一年使用:0次
名校
3 . 已知等差数列
的前
项和为
,且
,
,则
的值最大时对应的
为
![](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/878f2b173b88049b347a2b196103ef40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c98aaba1203b133a3b019d6102e367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b0ce091d97e660048a72f3a03ac63d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.1 | B.5 | C.6 | D.7 |
您最近一年使用:0次
名校
4 . 已知数列
的前
项和为
,且
.
(1)求数列
的通项公式;
(2)设
,数列
的前
项和为
,求
的最小值及取得最小值时
的值.
![](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/c8370a173854471a3eb27637993a3d5d.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f06e46321550cf196b4f150446b13c3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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2019-04-04更新
|
3433次组卷
|
8卷引用:福建省莆田第八中学2023届高三上学期入学模拟考试数学试题(一)
福建省莆田第八中学2023届高三上学期入学模拟考试数学试题(一)【市级联考】山东省济南市2019届高三3月模拟考试数学(文)试题【全国百强校】北京市中国人民大学附属中学2019届高三高考信息卷(一)文科数学试题2019届辽宁省实验中学高三模拟考试数学(文)试题山东省博兴县第一中学2018-2019学年高三4月月考数学(文)试题安徽省滁州市定远县重点中学2020届高三下学期6月模拟数学(文)试题(已下线)突破4.2.2 等差数列的前n项和课时训练-【新教材优创】突破满分数学之2020-2021学年高二数学课时训练(人教A版2019选择性必修第二册) 江苏省南京市2021届高三下学期二模数学试题
2018高三下·全国·专题练习
名校
5 .
为数列
的前
项和.已知
,
.
(1)求
的通项公式;
(2)设
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14bcf7b4e318f4c6aeb307fff490a20e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff265025b88c5e2cfa3a0893ccf45a03.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8154682e86575b8fe4807e923cd86e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee4464b3b4eb6e52ee02f095aae84f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb26cd1601fe7e76e1e2dc0b4909324a.png)
您最近一年使用:0次
2018-06-06更新
|
1048次组卷
|
4卷引用:福建省厦门市双十中学2019-2020学年高二上学期开学考试数学试题
福建省厦门市双十中学2019-2020学年高二上学期开学考试数学试题(已下线)2018年5月27日 押高考数学第17题(1)——《每日一题》2018年高三理科数学四轮复习 (已下线)2018年5月27日 押高考数学第17题(1)——《每日一题》2018年高三文科数学四轮复习 山东省枣庄市2018届高三第二次模拟考试数学(理)试题