名校
解题方法
1 . 设
为数列{
}的前n项和,已知
,且
.
(1)证明:{
}是等比数列;
(2)若
成等差数列,记
,证明
<
.
![](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/44d6a016b6cb27047fa22682a4846ce3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc9efeb4455e30293d412938eeea85d5.png)
(1)证明:{
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4294cb4b3f97d61bf7569aaa54b8f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd89ddf27359acf69523df80335878c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/915f4eeb65f99ad54800f4624eba1032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
您最近一年使用:0次
2022-11-11更新
|
696次组卷
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3卷引用:江苏省盐城市第一中学2022-2023学年高三上学期12月学情调研(五)数学试题
2 . 在
中,“边a,b,c成等差数列”是“
”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd5e7f74e65b90c9c78c919fedb98a90.png)
A.充要条件 | B.充分不必要条件 | C.必要不充分条件 | D.既不充分又不必要条件 |
您最近一年使用:0次
22-23高三上·江苏南通·阶段练习
名校
3 . 已知等比数列
的前
项和为
,且
成等差数列,则数列
的公比
( )
![](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/dc03d6818715dc27db0fd87704d19daa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0d99fef1aa4dbcc6dc7b30b7d2c9a9.png)
A.1或![]() | B.![]() ![]() |
C.![]() | D.1或![]() |
您最近一年使用:0次
2022-10-10更新
|
823次组卷
|
5卷引用:江苏省南通市如皋市2022-2023学年高三上学期教学质量调研(一)数学试题
(已下线)江苏省南通市如皋市2022-2023学年高三上学期教学质量调研(一)数学试题江苏省南京市第十三中学2022-2023学年高三上学期教学质量调研(一)数学试题河北省2022-2023学年高三上学期期中学业水平诊断数学试题(已下线)第4章 数列(A卷·知识通关练) (1)(已下线)第四章 数列单元检测卷(知识达标)-【一堂好课】2022-2023学年高二数学同步名师重点课堂(人教A版2019选择性必修第二册)
解题方法
4 . 已知点P在双曲线
(
,
)上,
,
分别是E的左、右焦点,若
是
,
的等差中项,且
,则E的离心率是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e1e81a0995ee5492c4281539c65bf00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cdfc6a59392d1ac3cd89ddc0308864c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4ef569668e797b1e94257fd5f4384dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96fa27f8db6167d4802a510371077bb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cae04f71fdf49f7edde45fe6f7bc2398.png)
A.![]() | B.![]() | C.2 | D.5 |
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2022-03-16更新
|
457次组卷
|
3卷引用:江苏省扬州市高邮市第一中学2022届高三下学期3月质量检测数学试题
名校
5 . 已知数列
是等比数列,
是其前
项和,则“
成等差数列”是“
成等差数列”的( )
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efce67f8baa503fc861f51f8b4616bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/508366d3432627658d43cb1252ca5239.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
2022-03-18更新
|
362次组卷
|
4卷引用:江苏省靖江中学、丹阳中学、沭阳中学三校2021-2022学年高三上学期12月联考数学试题
江苏省靖江中学、丹阳中学、沭阳中学三校2021-2022学年高三上学期12月联考数学试题(已下线)1.2 逻辑用语与充分、必要条件(精练)-【一隅三反】2023年高考数学一轮复习(提升版)(新高考地区专用)(已下线)湖南省长沙市雅礼中学2024届高三上学期月考(二)数学试题变式题6-10(已下线)4.3.2等比数列的前n项和公式(第2课时)(分层作业)(3种题型)-【上好课】高二数学同步备课系列(人教A版2019选择性必修第二册)
名校
解题方法
6 . 已知数列
的前
项和为
,
,
,
,其中
为常数.
(1)证明:
;
(2)若
为等差数列,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffa01f03fb074bff35b35e07047d11b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abdc305f1ec88235947e0d137dc0fb75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce8429376dc577ccfbc9e34cd41986b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3cf6f2bbe20a404fea41a4d2b1c4c7.png)
您最近一年使用:0次
2022-02-24更新
|
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|
5卷引用:江苏省苏州市高新区第一中学2021-2022学年高三上学期10月月考数学试题
名校
解题方法
7 . 设
是首项为1的等比数列,若
,
,
,成等差数列,则通项公式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b2667a6c91b720ca9b42d092c776cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73f6aba03136f0c6d7c4de8f2a6e63b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
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2022-02-17更新
|
678次组卷
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3卷引用:江苏省淮安市淮阴中学2021-2022学年高三上学期12月月考数学试题
名校
8 . 若实数a,b满足a,3,b成等差数列,则ab的最大值为______ .
您最近一年使用:0次
名校
解题方法
9 . 设数列
是公差不为零的等差数列,满足
,
.数列
的前
项和为
,且满足
.
(1)求数列
和
的通项公式;
(2)在
和
之间插入1个数
,使
,
,
成等差数列;在
和
之间插入2个数
,
,使
,
,
,
成等差数列;……;在
和
之间插入
个数
,
,…,
,使
,
,
,…,
,
成等差数列.
(i)求
;
(ii)是否存在正整数
,
,使
成立?若存在,求出所有的正整数对
;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d1a66fe60155dc96fa49cd8f8acba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a1959c73ff64b894a7d361742b6f6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3655d7a0a30564561a02f2220f52b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b375bf2b3b6f305c3cef38c382c6738.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/eafbe752c4652e4cf45bfa54ecc0e0ec.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bcd5c11234a01e2b3d2861e9b3a3aec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bcd5c11234a01e2b3d2861e9b3a3aec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57483e04fd1840c87ac5325157149877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65cdaa89ae90492504808aba2737fac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5733622aabd5a8af1ba76716c86b705a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65cdaa89ae90492504808aba2737fac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5733622aabd5a8af1ba76716c86b705a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57483e04fd1840c87ac5325157149877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e95931effbd59c43e8ed1ea09962b84f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e5cbc4ff3ff76f59867618361b8a2f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa76cf9b7e61f025a614dfea37880500.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/248cbe7c32c92eacf3668e347f07db0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e5cbc4ff3ff76f59867618361b8a2f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa76cf9b7e61f025a614dfea37880500.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/248cbe7c32c92eacf3668e347f07db0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e95931effbd59c43e8ed1ea09962b84f.png)
(i)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dfba246a7b7641ea309865d5fd5ff1d.png)
(ii)是否存在正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/718651eeae738f1bbf9c133e5b701a1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba7204f43679af6935e494c59d40c6ff.png)
您最近一年使用:0次
2022-05-29更新
|
939次组卷
|
5卷引用:2020届江苏省南京师大附中高三上学期11月月考数学试题
名校
10 . 在数列
中,
若
为等差数列,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d340caad1a98632cf41f029701e68ac4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
A.![]() | B.4 | C.5 | D.6 |
您最近一年使用:0次
2021-12-22更新
|
1065次组卷
|
3卷引用:江苏省南京市中华中学2021-2022学年高三上学期12月月考数学试题
江苏省南京市中华中学2021-2022学年高三上学期12月月考数学试题(已下线)专题04 数列(突破训练)-备战2022年高考数学二轮复习重难考点专项突破训练(全国通用)黑龙江省双鸭山市饶河县高级中学2021-2022学年高二上学期期末数学试题