1 . 数列
和
分别是各项都为正数的等差数列和等比数列,满足
,
,
,
.
(1)求数列
和
的通项公式;
(2)令
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c87695ac8deccc6df6b658414e12502.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e0e152b210b833532095ac3b2c8913.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1dce196c2dfa4392b85d5d07b982868.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f27210db48bf732860b63a5462339b80.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d44ddab6e0c60119be69985ae7fa65b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c88a7ef007c78a93e33bd77c4396626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2020-06-29更新
|
381次组卷
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4卷引用:福建省2020届高三(6月份)高考数学(理科)模拟试题(b卷)
福建省2020届高三(6月份)高考数学(理科)模拟试题(b卷)福建省2020届高三毕业班质量检查测试(B卷)数学(理)试题(已下线)考点23 数列的综合应用-备战2021年高考数学(文)一轮复习考点一遍过(已下线)4.3.2 等比数列前n项和1课时
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2 . 将数列
与
的公共项从小到大排列得数列
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e439697572e2dbd6826f7743b969813.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/335720b992166b5b6fe8be012df5fc77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
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2020-12-03更新
|
377次组卷
|
4卷引用:山西省运城市2021届高三上学期期中数学(文)试题
山西省运城市2021届高三上学期期中数学(文)试题福建省厦门外国语学校2021届高三1月阶段性检测数学试题北京市平谷区第五中学2020-2021学年高二下学期第一次月考数学试题(已下线)专题 11等差数列性质及应用归类(2)
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解题方法
3 . 已知数列
满足
,
,其中
.设
.
(1)求证:数列
是等差数列;
(2)求数列
的通项公式.
(3)令
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fc336b4a83bf6d66c4afcc431597f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4246613582ad4c0ba61531226bc1e3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74f47f53e669af3e665f01a3462581e3.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(3)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec9d61293e0eae0273d0d35f7e5dabca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b667de0002d5ebc53b9d9c804d30d44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b69f65365b0845d14e64cad8f395f23.png)
您最近一年使用:0次
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解题方法
4 . 已知等差数列
满足:
,
,数列
的前n项和为
.
(1)求
及
;
(2)设
是首项为1,公比为3的等比数列,求数列
的前
项和
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1861ae106363d31c7d21c6ca69e5656c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/645804019288a78ed7483b06f410cecc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bfccafa83afe5ee21eab6ef2b2c8852.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f24799142bff9db22b0811c094e782b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2448cf72af76b810310e4cfb9818e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb26cd1601fe7e76e1e2dc0b4909324a.png)
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2018-08-25更新
|
628次组卷
|
9卷引用:江西省宜春市樟树中学2017-2018学年高一下学期第三次月考数学(理)试题
江西省宜春市樟树中学2017-2018学年高一下学期第三次月考数学(理)试题(已下线)2018年9月26日《每日一题》一轮复习(理)-等差数列与等比数列的综合应用(已下线)2018年9月28日《每日一题》一轮复习(文)-等差数列与等比数列的综合应用(1)福建省平和第一中学2021-2022学年高二12月质量检测数学试题江西南昌西湖区南昌市外国语学校2020-2021学年高一下学期期中数学试题湖南省岳阳市临湘市2021-2022学年高二上学期期末教学质量检测数学试题第1章 数列 单元检测题陕西省渭南市2023-2024学高三上学期教学质量检测一(一模)文科数学试题(已下线)期末真题必刷压轴60题(22个考点专练)-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(沪教版2020必修第三册)
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5 . 已知数列
的前
项和为
满足
,则数列
的通项公式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/606e55241a2e145d54849129b8ffd20f.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/4e70cf53c33ca87703b6e55a7b655ee5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/606e55241a2e145d54849129b8ffd20f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
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2019-04-03更新
|
628次组卷
|
2卷引用:【全国百强校】福建省厦门外国语学校2018-2019学年高一下学期第一次月考数学试题
6 . 甲虫是行动较快的昆虫之一,如表记录了某种类型的甲虫的爬行速度:
(1)你能建立一个等差数列的模型,表示甲虫的爬行距离和时间之间的关系吗?
(2)利用建立的模型计算,甲虫1min能爬多远?它爬行49cm需要多长时间?
时间t(![]() | 1 | 2 | 3 | … | ? | … | 60 | |
距离s(cm) | 9.8 | 19.6 | 29.4 | … | 49 | … | ? |
(2)利用建立的模型计算,甲虫1min能爬多远?它爬行49cm需要多长时间?
您最近一年使用:0次
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解题方法
7 . 已知等差数列
前
项和为
,
,数列
的前
项和为
,
,
.
(Ⅰ)求数列
,
的通项公式;
(Ⅱ)若数列
满足
,
,求
的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6f1af4b44b2e97e8f319bab4ae9010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c103d1af236be75242e7184b53caec5.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34692dff5dfbe0fed4bc4b9743612622.png)
(Ⅰ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(Ⅱ)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd11c351e601e800ee95e42bb8f43f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802fa2abc51186cc44a3ed27f2e15432.png)
您最近一年使用:0次
8 . 已知数列
满足
,
,设
.
(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/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7285a9a10a059c7ee640022972621bf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980d51ba3340a31964fbec9e6f243ca6.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37f21320fc290eead2232ebd093879d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
2020-09-04更新
|
356次组卷
|
7卷引用:2020届福建省福州市高三适应性练习卷数学理科试题
2020届福建省福州市高三适应性练习卷数学理科试题福建省莆田第二十五中学2021届高三上学期月考(一)数学试题重庆市巴蜀中学2019-2020学年高三下学期3月质量检测数学(理)试题2020届山东省日照市高三校际联合考试(二模)数学试题(已下线)数学-6月大数据精选模拟卷03(海南卷)(满分冲刺篇)(已下线)专题四 数列-山东省2020二模汇编陕西省西安市蓝田县2021-2022学年高二上学期期末理科数学试题
名校
解题方法
9 . 已知数列
满足
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ebce85ea9bc18815ef8887057030a63.png)
__________ .
![](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/6ab21659d6da34e5e926acfb8de82350.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ebce85ea9bc18815ef8887057030a63.png)
您最近一年使用:0次
2018-03-08更新
|
865次组卷
|
3卷引用:福建省莆田市2018届高三下学期教学质量检测(3月)数学(文)试题
解题方法
10 . 等差数列
的公差为2,若
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65994c37c9b6dce360cd0238efd5e0c.png)
______ ,数列
的通项公式为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e996912242c24bf463089a187beff0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f577ab5579a60380deb88c1dbb1d7697.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65994c37c9b6dce360cd0238efd5e0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
您最近一年使用:0次