1 . 若
是函数
的两个不同的零点,且
这三个数可适当排序后成等差数列,也可适当排序后成等比数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84321d37ec168d51bdc810a007845c38.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24941259f1fbfdbc629fbeda89014d3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/927ee41438ed22c14483e40d5e75244d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84321d37ec168d51bdc810a007845c38.png)
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2024-02-14更新
|
346次组卷
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3卷引用:广西贵港市2023-2024学年高二上学期期末考试数学试卷
广西贵港市2023-2024学年高二上学期期末考试数学试卷广东省部分学校2023-2024学年高二上学期期末教学质量监测数学试卷(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)
2 . 已知等差数列
和正项等比数列
满足:
,
,
.
(1)求数列
,
的通项公式;
(2)已知数列
满足
,求数列
的前
项和
.
![](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/85444874c705666de9488286d3d61dd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923ab4c36900380fc63318cced87f0c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b99b52144274fcc39e766ef64fc3cd74.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d44ddab6e0c60119be69985ae7fa65b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2024-02-13更新
|
1641次组卷
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6卷引用:广西百色市2023-2024学年高二上学期期末教学质量调研测试数学试卷
广西百色市2023-2024学年高二上学期期末教学质量调研测试数学试卷甘肃省武威市凉州区2023-2024学年高二下学期开校质量检测数学试卷(已下线)5.3.2 等比数列的前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)重庆市西南大学附属中学校2023-2024学年2023-2024学年高二下学期3月测试数学试题广东省珠海市香樟中学2023-2024学年高二下学期第一次诊断性监测数学试卷广东省佛山市三水区华侨中学2023-2024学年高二下学期第一次测试数学试卷
解题方法
3 . 数列
的前
项和为
,已知
,则下列说法正确的是( )
![](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/1e1348f2d99a58e7cb2b0d9feecad205.png)
A.数列![]() |
B.数列![]() |
C.当![]() ![]() |
D.当![]() ![]() |
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4 . 定义:若无穷数列
满足
是公比为
的等比数列,则称数列
为“
数列”.设数列
中,
.
(1)若
,且数列
为“
数列”,求数列
的通项公式;
(2)若数列
是“
数列”,是否存在正整数
,使得
,若存在,请求出所有满足条件的正整数
;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82c65a855b1eed9c43e6829f6c3bffb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d83f7ab72975f7588724dcd7726cca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447c6f91cc9ed460456899214b5b2d7e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eab7d59ce066c8f0b346719003f8e28f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d83f7ab72975f7588724dcd7726cca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a631d6e9b5cc899fba66187a3ac9735.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/740b2c2f16c129d11e56ef30d5f08bae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
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名校
5 . 已知
是等差数列,其前n项和为
,
,则下列结论一定正确的有( )
![](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/72db14b97a5318c818b61a19862218c2.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
解题方法
6 . 数列
的前
项和为
,已知
,则下列说法正确的是( )
![](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/7aa4db05fc9272ce8500a102890fceaf.png)
A.![]() | B.![]() |
C.当![]() ![]() | D.当![]() ![]() ![]() |
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2024-01-26更新
|
639次组卷
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4卷引用:广西壮族自治区玉林市2023-2024学年高二上学期1月期末数学试题
广西壮族自治区玉林市2023-2024学年高二上学期1月期末数学试题(已下线)第五章:数列(单元测试)-2023-2024学年高二数学同步精品课堂(人教B版2019选择性必修第三册)四川省成都市简阳实验学校2023-2024学年高二下学期3月月考数学试题内蒙古呼和浩特市回民区2023-2024学年高二下学期期中考试数学试题
7 . 南宋数学家杨辉所著的《详解九章算法》中有如下图所示的几何体,后人称之为“三角垛”.其最上层有1个球,第二层有3个球,第三层有6个球,第四层有10个球,…,则第三十五层球的个数为( )
A.561 | B.595 | C.630 | D.666 |
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名校
解题方法
8 . 等差数列的前n项和为
,若
,
,则( )
A.![]() | B.![]() |
C.![]() | D.![]() |
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2024-01-25更新
|
561次组卷
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7卷引用:广西贵港市2023-2024学年高二上学期期末考试数学试卷
解题方法
9 . 在数列
中,已知
,
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9ca4927266abab5f28255157274e168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fba2bf47df4762624e678258e4cd96fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
A.2 | B.3 | C.4 | D.5 |
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2024-01-25更新
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名校
10 . 已知等差数列
的前5项之和为25,
,则公差为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/562bf10d55724c77204c6953c7fbf7e2.png)
A.6 | B.3 | C.4 | D.5 |
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