1 . 在各项均为正数的等差数列
中,
,
,
,
成等比数列,保持数列
中各项先后顺序不变,在
与
(
)之间插入
个3,使它们和原数列的项构成一个新的数列
,记
的前
项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba6cfe16dc048f56fe123b49c6f12b33.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e7804d62e52b2254fc3ac4e5f64b508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/329eeaf5a8942b1e4865eb8fbbc4da7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/217b927efe12a98e1082ecd7f035b921.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46d5d5ee1e931d962c6cec789137fa11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98aa5f1acb67ec4580d240c2525e4d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba6cfe16dc048f56fe123b49c6f12b33.png)
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2024-01-17更新
|
420次组卷
|
4卷引用:黑龙江省哈尔滨市六校2023-2024学年高二上学期1月期末联考数学试题
2 . 公差不为零的等差数列
,
,如果
成等比数列,求数列
的通项_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0dc17b42117ed5d01ba8f0219a0fca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e5e05db7edca604b40de6e61f9badbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
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3 . 在等差数列
中,已知
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.png)
______ .
![](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/a51c55e7bfb89ad0113afaf43834438c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.png)
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名校
解题方法
4 . 已知等差数列
是递增数列,且满足
,
,令
,且
,则数列
的前
项和为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/393ab8cef9e50955d6549d91a837f8bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dea12e7026603de7144048c5eee90bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5262a482e7da77671e8639b79f8e07d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fd705b936f0417aa140f274e195f56b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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2024-01-12更新
|
820次组卷
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4卷引用:专题04 数列(2)
解题方法
5 . 设
为等差数列
的前
项和.若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af1f1b7e9e20d799ee3c06b89a0611c.png)
______ .
![](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/b1549723d901eeb2cf966e322f404a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f06d67d9f9d720ed353e617c03bf720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af1f1b7e9e20d799ee3c06b89a0611c.png)
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2024-01-11更新
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3卷引用:云南省昆明市西山区2023-2024学年高二上学期1月期末考试数学试题
云南省昆明市西山区2023-2024学年高二上学期1月期末考试数学试题江西省宜春市丰城市东煌学校2023-2024学年高二下学期3月月考数学试题(已下线)2024年新课标全国Ⅱ卷数学真题变式题11-15
6 . 在等差数列
中,首项
,公差
,若
,则
等于__________ .
![](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/ae3012337aa392709349731fb1eef5b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/791e129060cdc7bc5324679c0087ab9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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2024-01-10更新
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764次组卷
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3卷引用:江西师范大学附属中学2023-2024学年高二上学期期末数学试卷
江西师范大学附属中学2023-2024学年高二上学期期末数学试卷(已下线)1.2.2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(北师大版2019选择性必修第二册)陕西省商洛市2024届高三上学期尖子生学情诊断考试数学(文科)试题
名校
7 . 已知正项等差数列
中,
,其中
,6,
构成等比数列,
,数列
的前
项和为
,若
,不等式
恒成立,则实数
的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d93c1ae7b22099a5d4c1c4241e5ca18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e191086446263b7bbbd93613577c42.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f8365233f341451598eb50525a1557a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d30793e17f7b00abfa51ef3b213ddbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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5卷引用:湘豫名校联考2023-2024学年高二上学期1月阶段性考试数学试题
湘豫名校联考2023-2024学年高二上学期1月阶段性考试数学试题河南省商丘市第一高级中学2023-2024学年高二上学期1月份半月考数学试卷山东省菏泽市定陶区第一中学2023-2024学年高二上学期期末模拟数学试题广东省珠海市第一中学2024届高三上学期大湾区期末预测数学试题(二)(已下线)考点6 等比数列的前n项和的性质 2024届高考数学考点总动员【练】
名校
解题方法
8 . 已知等差数列
的前
项和为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8fc16a789f1e683126684c09ceee665.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71afe5572f67433ecb05a06e619f527a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8fc16a789f1e683126684c09ceee665.png)
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4卷引用:河北省邢台市部分重点高中2023-2024学年高二上学期1月期末数学试题
河北省邢台市部分重点高中2023-2024学年高二上学期1月期末数学试题(已下线)5.2.2 等差数列的前n项和(3知识点+8题型+强化训练)-【帮课堂】2023-2024学年高二数学同步学与练(人教B版2019选择性必修第三册)(已下线)4.2.2 等差数列的前n项和公式——课后作业(提升版)(已下线)专题03数列期末7种常考题型归类【好题汇编】-备战2023-2024学年高二数学下学期期末真题分类汇编(人教B版2019选择性必修第三册)
名校
解题方法
9 . 设等差数列
的公差为
,前
项和为
,已知
.
(1)若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c98c59cd4749afdd21e73529fc84323.png)
___________ ;
(2)若
,则
的最小值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.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/630df1e98d73e9c43bd8378991534dd6.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a749d8f7bbec9b1c624c0bb254247a6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c98c59cd4749afdd21e73529fc84323.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae3012337aa392709349731fb1eef5b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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解题方法
10 . 数列
满足
,
,当
时,
,当
时,
,
,则当
时,m的最小值为 __________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12512ece96c59b86d189818f1e5310fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24d26a0d1d970ebd1d91de7a2595eb7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0cc8323f233d943d7e4acc6a8c8615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50e8dba0e417c39ee9735d3ae264331.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2fbc5238724ee8778fdaf6989a09db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcde7189db381533bc4d0e4d24e4dce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b0746a010e029b5aa3f1d72dba5e82.png)
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