名校
解题方法
1 . 在①
,②
是
,
的等差中项,③
.这三个条件中任选一个作为已知条件,补充在下面的问题中,然后解答补充完整的题.
已知正项等比数列
的前n项和为
,
,且满足______(只需填序号).
(1)求数列
的通项公式;
(2)设
,求数列
的前n项和
.
注:若选择多个条件分别解答,则按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a0648b72f9e4f95ee07df15fd80e7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dda6c54eafc6fe26d710ff3d8cb7b5a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb1bc50899a3e1c7680b339cb9a9adec.png)
已知正项等比数列
![](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/b13a6e1d671215fc96e4bee3541d1096.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b08ac67cf429ba14a527e6f054018c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/005852a14814cd0fcb5d3aad41d714a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
注:若选择多个条件分别解答,则按第一个解答计分.
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2022-05-19更新
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2卷引用:黑龙江省哈尔滨第九中学校2022届高三下学期第四次模拟考试理科数学试题
名校
解题方法
2 . 已知等比数列
的各项均为正值,
是
、
的等差中项,
,记
.
(1)求数列
和
的通项公式;
(2)设数列
的前
项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a37f1b45e929b42044626edb63681fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b2667a6c91b720ca9b42d092c776cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a135c20407aa59f589f9e2e837fc37b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40185377bf23c0aef1f590d2a77cf452.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da72309d2507e2f5e5ed88d8cc08963.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/f9928e46511e601913619a427ded84a3.png)
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5卷引用:黑龙江省哈尔滨市哈尔滨师范大学附属中学2022-2023学年高三上学期开学考试数学试题
名校
解题方法
3 . 设
为等比数列
的前n项和,若
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0e764d9df116dcbecea5e1aea077a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efd925b33161c316a40b0a2ac20465e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ce44cdc798888e0920e0441deadd255.png)
A.![]() | B.2 | C.9 | D.![]() |
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8卷引用:黑龙江省哈尔滨市哈尔滨德强学校2022-2023学年高二上学期11月月考数学试题
名校
解题方法
4 . 已知递增等比数列
的前n项和为
,且满足
,
.
(1)求数列
的通项公式.
(2)若数列
满足
,求数列
的前15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/b81f889b151789dae423143ff5ff21b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/964df3e9308711d7e14fb624b0c25e2f.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d91bc211f389e6a55f3cbc9106834a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
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5卷引用:黑龙江省双鸭山市第一中学2021-2022学年高二下学期6月月考数学试题
黑龙江省双鸭山市第一中学2021-2022学年高二下学期6月月考数学试题广东省2022届高三二模数学试题重庆市南开中学校2021-2022学年高二下学期5月月考数学试题(已下线)专题25 等比数列及其前n项和(已下线)专题25 等比数列及其前n项和-4
名校
5 . 在等比数列
中,若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0382b4a2ab0657d2d6830bb6be2b17b6.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ac8419cf6c0e1d70ea5f5a9eb6dad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb0abedd59476f8793d5a8948590a70c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0382b4a2ab0657d2d6830bb6be2b17b6.png)
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|
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7卷引用:黑龙江哈尔滨工业大学附属中学校2021—2022学年高二下学期月考数学试题(文)
黑龙江哈尔滨工业大学附属中学校2021—2022学年高二下学期月考数学试题(文)上海市七宝中学2021-2022学年高二下学期期中数学试题(已下线)4.2等比数列及其通项公式(第1课时)(作业)(夯实基础+能力提升)-2022-2023学年高二数学精品教学课件(沪教版2020选择性必修第一册)陕西省渭南市临渭区2022-2023学年高二上学期期末理科数学试题陕西省渭南市临渭区2022-2023学年高二上学期期末文科数学试题(已下线)核心考点06数列-【满分全攻略】2022-2023学年高二数学下学期核心考点+重难点讲练与测试(沪教版2020选修一+选修二)陕西省宝鸡市千阳县中学2023-2024学年高二上学期期末复习基础训练数学试题
6 . 正项等比数列
满足
,
,则该数列的公比的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e38b73e76c9b7dfd43d30a8ef23f03c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32df333ec0e98d41112a262b077a0f59.png)
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名校
解题方法
7 . 已知数列
的前
项和
,等比数列
中,
.
(1)求数列
、
的通项公式;
(2)设数列
的通项公式
,求数列
的前
项和
.
![](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/dcc8f3e6ffd1d667e4ff506915ad4a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f31dafb378740a248e85b9b999ade8b.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9221c0c92a526f65533cdc5400767af.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)
您最近一年使用:0次
名校
8 . 等比数列
的公比为
,且满足
,
,
.记
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8141d87fb02b08c88b0c9f27f839a7d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64ab07eddc3bc9fa372c9e90a1581eb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd71f77cd99a565dbf5506f7ae87a3ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd2a777ca80aba17b6dd45805665540.png)
A.![]() | B.![]() |
C.![]() | D.使![]() ![]() |
您最近一年使用:0次
9 . 已知
为等比数列,前n项和为
,
,
.
(1)求
的通项公式及前n项和
;
(2)若
,求数列
的前100项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04e406b775bbaa0ae52dab5b7bd384a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8417369248bb4810344f420c6dc55f1c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0f6000421c5370e4b89f23be199f388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff06fec40c41ef4a8ffccd6efc0658b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00136ab4fd69ba9c28b47cd38442dc3a.png)
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|
1261次组卷
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4卷引用:黑龙江省佳木斯市第十二中学2021-2022学年高二下学期期中数学试题
黑龙江省佳木斯市第十二中学2021-2022学年高二下学期期中数学试题宁夏石嘴山市2022届高三适应性测试数学(文)试题四川省绵阳南山中学2021-2022学年高一下学期期中考试数学试题(已下线)4.4 求和方法(精练)-【一隅三反】2023年高考数学一轮复习(基础版)(新高考地区专用)
名校
10 . 在数列
中,
,数列
是公比为2的等比数列,设
为
的前n项和,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb34b6f01296502fd0f9adf8c78bea6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
A.![]() | B.![]() |
C.数列![]() | D.![]() |
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5卷引用:黑龙江省实验中学2021-2022学年高二下学期4月月考数学试题
黑龙江省实验中学2021-2022学年高二下学期4月月考数学试题海南省2022届高三数学全真模拟试题(一)(已下线)2022年高考考前20天终极冲刺攻略(三)【数学】(新高考地区专用) (5月30日)1.3.1 等比数列及其通项公式(同步练习提高版)(已下线)专题16 等比数列-3