1 . 在正项等比数列
中,
.
(1)求
的通项公式:
(2)已知函数
,数列
满足:
.
(i)求证:数列
为等差数列,并求
的通项公式
(ii)设
,证明:
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/963be18b37690c2a4cebefad320b1aaf.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5e688cc3939a9422a6433a0dc23d2f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0060ba7c94a156f968c7e3dd7dc34975.png)
(i)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51da505ea6ab5a3f92e459c311304e21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
(ii)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/831de7531e4b51f836a5ef44c4791198.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5475fe99ef8eb84ab937f54ac9cdcc75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655c46b33730f3a29b9ec3024df71375.png)
您最近一年使用:0次
2 . 设
是等差数列,
是各项均为正数的等比数列,
,
.
(1)求数列
与
的通项公式;
(2)数列
的前
项和分别为
;
(ⅰ)证明
;
(ⅱ)求
.
![](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/7d2321a15e35423a7e85ec684b2b8a12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/591c8f4062164ea52d6311e593022b97.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e567d7e9761951a266953c8d5042ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/478421b81927e435cbcf5acafa89efd7.png)
(ⅰ)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b414c0b74e1d3831f72e545371b4e4.png)
(ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86117f13f9345c3e8b549ce050d79e12.png)
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3 . 已知等比数列
的各项均为正数,若
成等差数列,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c27047c478842611c2dbf9053ab6f9e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96bf56512cc4d9d78744d083ef5ad485.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
22-23高二下·全国·课后作业
名校
解题方法
4 . 在等比数列
中,
则
为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3f2b554e8c6d95298abb6cf0fd92e6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b42cf1011b8ff1b5671ce9fea2c7e751.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-08-21更新
|
1592次组卷
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7卷引用:天津市河西区2024届高三下学期第一次质量调查数学试题
天津市河西区2024届高三下学期第一次质量调查数学试题湖南省益阳市安化县第五高级中学等校2023届高三下学期联合模拟测试数学试题(已下线)4.3.2等比数列的前n项和(2)第1章 数列 单元检测题(已下线)第三节 等比数列 (讲)浙江省杭州高级中学2021-2022学年高二上学期期末数学试题辽宁省沈阳市第一二〇中学2023-2024学年高二下学期第二次质量监测数学试题
5 . 设
是等差数列,其前
项和为
(
),
为等比数列,公比大于1.已知
,
,
,
.
(1)求
和
的通项公式;
(2)设
,求
的前
项和;
(3)设
,求证:
.
![](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/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b72ddd7de598464a37b10f03f67b904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2a67dcbf9295be6491c0f0ce14afefb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d5252b6b2b8d408dcae481a53412aea.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c6f5cbee4532fa4ab4800f0312abfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28d1185449c051b1370380bbe217b83e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82eecfb3ac863cfbfa9af416576801a.png)
您最近一年使用:0次
2023-05-18更新
|
2246次组卷
|
4卷引用:天津市北辰区2023届高三三模数学试题
6 . 已知数列
满足:
,正项数列
满足:
,且
,
,
.
(1)求
,
的通项公式;
(2)已知
,求:
;
(3)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9613f8aa0a503b83e25141127a19efe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7bdaf9fa374c130456f462ee49c4ee1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ffaa768f1232ff14bcd2cdd438ce53a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1273751a0b5a984cf01c2d0e00e474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb27d03d22ec55dbf33d6d9d3c44854f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b97aef7af01785f58caee047c55187e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ca23ce02583bd8fe3b9d06d99e0e3c.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5fca0c9355067a7b3e8d60bf0573e40.png)
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2023-04-29更新
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8卷引用:天津市十二区重点学校2023届高三下学期毕业班联考(二)数学试题
天津市十二区重点学校2023届高三下学期毕业班联考(二)数学试题天津市宁河区芦台第一中学2022-2023学年高二下学期5月学情调研数学试题天津市滨海新区塘沽第一中学2024届高三毕业班八校联考数学模拟试题(已下线)专题15 数列不等式的证明 微点6 数列不等式的证明综合训练(已下线)2023年天津高考数学真题变式题16-20福建省福州格致中学2024届高三上学期10月质检数学试题(已下线)数列与不等式专题04数列求和(裂项求和)
7 . 已知数列
是首项为1的等差数列,数列
是公比不为1的等比数列,且满足
,
,
.
(1)求数列
,
的通项公式;
(2)求
;
(3)令
,记数列
的前
项和为
,求证:对任意的
,都有
.
![](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/84672a737e1ba65228ffd2f0064a8c9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40751e69baead4a0d5bea384aedfa6c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dbe8fa82ab04f0a4ba4ad1c570c9aa1.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
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5dfaa6e2fb5e7dedb30a0088ffa1c9f.png)
(3)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63767dbd3a4847a197a89f878573c731.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ef8539a7a09303a95b4e79fb9949fc.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/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/082dd35c1eebe15ec8d8b060f28cfd98.png)
您最近一年使用:0次
2023-04-17更新
|
1983次组卷
|
2卷引用:天津市七校联考2022-2023学年高三下学期总复习质量调查(一)数学试题
8 . 设等比数列
的前
项和为
,
,若
,且
、
、
成等差数列.
(1)求数列
的通项公式;
(2)设
,
,其中
表示不超过
的最大整数,求数列
的前
项的和;
(3)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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97769855336d73371930df1f187875e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2815b24f5a89be7ae53aed93182e8988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a35d79a1b4df9e4aade6a92f35bea2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebadf2b3ec3dc92cd902eff76085ad46.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4363f66b5cd86dc4084511badd0a03ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97769855336d73371930df1f187875e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec4bdc2a6d4fc387dc621f0b5a268c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98aa17ead59b84a3c58ee4db8dc05a48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97769855336d73371930df1f187875e.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
2023-04-06更新
|
2010次组卷
|
3卷引用:天津市河北区2023届高三一模数学试题
9 . 已知等差数列
的首项为1,前
项和为
,单调递增的等比数列
的首项为2,且满足
.
(1)求
和
的通项公式;
(2)证明:
;
(3)记
的前
项和为
,证明:
.
![](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/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9ad525825ff6bb8b28e3c80cdf036b8.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76442f2e25b79f454bafe51039085ad.png)
(3)记
![](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/7138e2d6abee321fad1cc324abb97738.png)
您最近一年使用:0次
10 . 在公差不为零的等差数列
和等比数列
中,
为
的前
项和.已知
,且
是
与
的等比中项.
(1)求
和
的通项公式;
(2)记数列
的前
项和为
,求
;
(3)求
.
![](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/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/f1371ddea5686475e758dbb68470bba5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)记数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52c9237cb0b4acc568d4afb12997186.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb12bc48822737f4065413e6e6bba7ce.png)
您最近一年使用:0次
2023-03-24更新
|
1682次组卷
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3卷引用:天津市部分区2023届高三下学期一模数学试题