名校
1 . 已知数列
是首项为1,公差不为0的等差数列,且
成等比数列,数列
满足
.
(1)求数列
的前
项和
;
(2)若
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2df98ce180b9d9e1a83f2c1332e2da9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5efc7445bb5e9655b4215a8432a0b9d9.png)
(1)求数列
![](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)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cd3d4dafc6a41befc7601d9713b1927.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e983de3df18e1b31dfc361da25973ff.png)
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2022-04-07更新
|
667次组卷
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3卷引用:陕西省西安中学2022届高三下学期五模文科数学试题
解题方法
2 . 已知等比数列
为递增数列,且
.
(1)求数列
的通项公式;
(2)设
,数列
的前n项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7bfb71a22c80ad4ba91d9f229e1349c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/084809130d2b5ee7472e82cb50063d2c.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/179d481579ebc5517bc418a0361c91b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1fa62547035003b5751493e05db2e24.png)
您最近一年使用:0次
3 . 已知正项等比数列
的前n项和为
,且
,数列
满足
.
(1)证明:数列
为等差数列;
(2)记
为数列
的前n项和,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d48de895988c617efcd5648accbc098.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e2f10fb0e09c5f69ab16ccc4a6b3ff8.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cef647dc9b88ec44e55639cf73049ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f90c342e24dd2af11c6ab820df7a549.png)
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2022-04-04更新
|
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4卷引用:陕西省2022届高三下学期二模预测理科数学试题
陕西省2022届高三下学期二模预测理科数学试题福建省福州第一中学2021-2022学年高二下学期期中考试数学试题(已下线)6.4 求和方法(精练)(已下线)专题05 数列 第三讲 数列与不等关系(分层练)
名校
解题方法
4 . 已知等比数列
中,
,
,
,
.
(1)求数列
的通项公式
;
(2)设
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9645bd4d2002993b90ec6d48f9c04f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/256dc254747fb583e74941cd1251371d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b2eb1424b861143446c752fdefea679.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/964df3e9308711d7e14fb624b0c25e2f.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e8afebcc423304d3239c9af623c0d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3a8e27a8eb41050f473f905a5a8e344.png)
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2022-04-04更新
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5卷引用:陕西省西安市阎、高、蓝、周、临五区县2022届高三下学期联考(二)理科数学试题
陕西省西安市阎、高、蓝、周、临五区县2022届高三下学期联考(二)理科数学试题陕西省西安市阎、高、蓝、周、临五区县2022届高三下学期联考(二)文科数学试题(已下线)三轮冲刺卷02-【赢在高考·黄金20卷】备战2022年高考数学(文)模拟卷(全国卷专用)广东省鹤山市鹤华中学2023届高三上学期开学摸底数学试题河北省石家庄市藁城新冀明中学2022届高三上学期12月月考数学试题
5 . 已知正项等比数列{
}满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da0333a73337b72d3811d9b619778074.png)
(1)求{
}的通项公式:
(2)求数列{
}的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da0333a73337b72d3811d9b619778074.png)
(1)求{
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)求数列{
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f2eed27c518fbad085ae7d6c5ee46b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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2022-04-04更新
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8卷引用:陕西省商洛市2022届高三下学期一模理科数学试题
6 . 已知函数
,数列
满足
.数列
为等差数列,满足
,
.
(1)求数列
、
的通项公式;
(2)求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03f1bf1b4fea733d960abe628896fb87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc20a15cba8a06328ff00e1b54350ea5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89fe0f4e8a80a2840c0f6929a8a6351b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad434a4b63932077a4e23db849089d64.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5344eadd4711db34e3f935aedd5fb270.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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2022-03-29更新
|
656次组卷
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3卷引用:陕西省咸阳市2022届高三下学期二模文科数学试题
名校
解题方法
7 . 已知数列
的前
项和
.
(1)求
的通项公式;
(2)设
,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/f9cfdbd65c45ba947a847f356076270b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2022-03-26更新
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3卷引用:陕西省咸阳市高新一中2022-2023学年高三上学期第五次质量检测理科数学试题
解题方法
8 . 在公比为2的等比数列
中,
成等差数列.
(1)求数列
的通项公式;
(2)若
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e1df63c6b9a697170449e1bd23b2a52.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d035ce3fa6be9883a488cbcb0458b200.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e554e17bb75fb6ca18e00995a0e9330b.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
2022-03-22更新
|
983次组卷
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3卷引用:陕西省西安市2022届高三下学期第二次质量检测理科数学试题
解题方法
9 . 在正项等比数列
中,
,前三项的和为7,若存在m,
使得
,则
的最小值为( )
![](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/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa45f845bc583ac93363ae117d591fa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd93ee03569849295ebde055410d1b84.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-03-21更新
|
583次组卷
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4卷引用:陕西省渭南市富平县2022届高三下学期二模理科数学试题
陕西省渭南市富平县2022届高三下学期二模理科数学试题江西省九大名校2022届高三3月联考数学(理)试题(已下线)查补易混易错点02 不等式-【查漏补缺】2022年高考数学(理)三轮冲刺过关(已下线)2.2 基本不等式(精讲)-【一隅三反】2023年高考数学一轮复习(提升版)(新高考地区专用)
名校
解题方法
10 . 已知函数
,现有下列四个命题:
①
,
,
成等差数列;
②
,
,
成等差数列;
③
,
,
成等比数列;
④
,
,
成等比数列.
其中所有真命题的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f0499141930680241c2d8fc5bd1922c.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d55ef0d1b7ea88d92fd6e1ecebb5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/904ac2400eefedf0ae7284ce4d088e86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3627e4ccde7d69c49034a4a2d10bee5.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d55ef0d1b7ea88d92fd6e1ecebb5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32a859898e9905e0524d3a982eb34b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356dcbfbfc0b929ea6204011ce8efd1d.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d55ef0d1b7ea88d92fd6e1ecebb5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7d20a4de8b2e528694792cc570c650.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8754ea93026a31e211830e9284e667b.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d55ef0d1b7ea88d92fd6e1ecebb5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32a859898e9905e0524d3a982eb34b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/689644cb85f0b04cc7fb910b10648d4b.png)
其中所有真命题的序号是( )
A.①② | B.②③ | C.①②③ | D.①②④ |
您最近一年使用:0次
2022-03-17更新
|
626次组卷
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6卷引用:陕西省榆林市2022届高三下学期二模文科数学试题