1 . 数列
满足
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3938fc9093a10b040b5ed9d18c876637.png)
(1)设
,证明数列
是等差数列
(2)求数列
的前
项和
.
![](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/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3938fc9093a10b040b5ed9d18c876637.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5653b60d16ec4e653518f0562680250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求数列
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
2020-10-20更新
|
415次组卷
|
6卷引用:甘肃省天水市秦安县民生高级中学2022届高三一模数学(文)试题
甘肃省天水市秦安县民生高级中学2022届高三一模数学(文)试题广西桂林市第十八中学2020-2021学年高二上学期第一次阶段性考试数学(理)试题广西桂林市第十八中学2020-2021学年高二上学期第一次阶段性考试数学(文)试题(已下线)第四章 数列单元测试(基础卷)-2020-2021学年高二数学新教材单元双测卷(人教A版2019选择性必修第二册)广东省佛山市顺德区郑裕彤中学2022-2023学年高二下学期3月第一次段考数学试题陕西省西安市周至县第四中学2023-2024学年高二上学期期末数学试题
2011·江西·一模
名校
解题方法
2 . 已知数列
满足
,
.
证明:数列
是等差数列,并求数列
的通项公式;
设
,求数列
的前
项和
.
![](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/a2c68afcd72a077c5bf253f2b9117ddf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/647020b0a1c11eaa91eb2b4ed9f2dd78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f730fee4a39e2743a5fb1dc26800354c.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)
您最近一年使用:0次
2020-08-06更新
|
225次组卷
|
9卷引用:2012届甘肃省天水一中高三百题集理科数学试卷(三)
(已下线)2012届甘肃省天水一中高三百题集理科数学试卷(三)(已下线)2011届江西省八所重点中学高三联合考试数学文卷(已下线)2013届安徽省马鞍山市高三第一次教学质量检测理科数学试卷(已下线)2015届四川成都七中高三上学期期中文科数学试卷2015届内蒙古一机一中高三12月月考理科数学试卷2016届浙江省绍兴市一中高三上学期期中文科数学试卷黑龙江省哈尔滨市阿城区第二中学2018-2019学年高一下学期期中考试数学试题安徽师范大学附属中学2019-2020学年高一下学期期末数学试题安徽省芜湖市2020-2021学年高一下学期期末数学试题
3 . 已知数列{
}满足
,且
.
(I)证明:数列{
}是等差数列;
(II)求数列{
}的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/277a0af183b6e90542c8dfe85ea9d432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
(I)证明:数列{
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bad3b29191902b958ed56647b3e9980.png)
(II)求数列{
![](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)
您最近一年使用:0次
2019-09-13更新
|
2199次组卷
|
2卷引用:甘肃省天水市第一中学2019-2020学年高二上学期第二次学段(期中)考试数学(理)试题
解题方法
4 . 已知数列
的各项为正数,其前
项和为
满足
,设
.
(1)求证:数列
是等差数列,并求
的通项公式;
(2)设数列
的前
项和为
,求
的最大值.
(3)设数列
的通项公式为
,问: 是否存在正整数t,使得
成等差数列?若存在,求出t和m的值;若不存在,请说明理由.
![](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/71e3fada69fbdbf095b43d1367df81bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9f2a118078a2b40285bbfa38d71ff7a.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设数列
![](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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(3)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8bb3d881b0b0c328f4c2cfa55e54a25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f401b2388e91b87ddc12aacf25f1b342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5659565f5638ab4609a7edc252370039.png)
您最近一年使用:0次
名校
解题方法
5 . 函数
,数列
满足
.
(1)求证:数列
是等差数列;
(2)令
,若
对一切
成立,求最小正整数m.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00d2856a8aab0a412d4b0b5340616499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/682a01a2f96321048e807baf7fd64985.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7b78e4a03d4595f14be42054b61dfc6.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd1b51d6d3798a64eff83628627a2291.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41bae39eace05922121489e182566105.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d5ec9ad92f37e64eccce922ab1b14e.png)
您最近一年使用:0次
2016-12-03更新
|
815次组卷
|
3卷引用:2015-2016学年甘肃省嘉峪关市一中高二上学期期中考试理科数学试卷
11-12高三上·广东·阶段练习
6 . 已知数列
为等差数列,且
,
.
(1) 求数列
的通项公式; (2) 令
,求证:数列
是等比数列.
(3)令
,求数列
的前
项和
.
![](https://img.xkw.com/dksih/QBM/2013/2/22/1571120867049472/1571120872587264/STEM/5beaf513ad544281adddd789bfe36dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8713c0a55c04fe0fc20259095d63c631.png)
(1) 求数列
![](https://img.xkw.com/dksih/QBM/2013/2/22/1571120867049472/1571120872587264/STEM/5beaf513ad544281adddd789bfe36dec.png)
![](https://img.xkw.com/dksih/QBM/2013/2/22/1571120867049472/1571120872587264/STEM/13b56fcc1c894a0bb8aaee35ab8b4f2c.png)
![](https://img.xkw.com/dksih/QBM/2013/2/22/1571120867049472/1571120872587264/STEM/603eca813dc040ce81c33e4de8c2af4c.png)
(3)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca857b7a6a1fe09827ecaa5f4c036069.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/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
2016-12-01更新
|
866次组卷
|
4卷引用:甘肃省兰州四中2018-2019学年高二上学期期中考试数学试题
甘肃省兰州四中2018-2019学年高二上学期期中考试数学试题(已下线)2012届广东省培正中学高三11月月考文科数学(已下线)2012-2013学年广东省执信中学高一上学期期末考试数学试卷云南省玉龙纳西族自治县田家炳民族中学2019-2020学年高一下学期第一次月考数学试题
2011·山东济南·高考模拟
解题方法
7 . 在数列
中,
,并且对于任意
,都有
.
(1)证明数列
为等差数列,并求
的通项公式;
(2)设数列
的前
项和为
,求使得
的最小正整数
.
![](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/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/950c6303c2ec03e48137be8addf9245c.png)
(1)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7706e0dba93c9f25c28bc8b01de44b70.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/fb3b52b4c0b54401a1dfc035c43edd82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
2010·山西临汾·模拟预测
解题方法
8 . 已知等差数列
的公差大于0,且
是方程
的两根,数列
的前n项的和为
,且
.
(1) 求数列
,
的通项公式;
(2) 记
,求证:
.
![](https://img.xkw.com/dksih/QBM/2011/10/17/1570320092807168/1570320098025472/STEM/4ead5d245fa147ac9361e2fa15d44adc.png?resizew=31)
![](https://img.xkw.com/dksih/QBM/2011/10/17/1570320092807168/1570320098025472/STEM/49908ce0c6c547399e6ca3cf9ad13337.png?resizew=39)
![](https://img.xkw.com/dksih/QBM/2011/10/17/1570320092807168/1570320098025472/STEM/e2e651b8e1784816842965c06bdd0ed8.png?resizew=115)
![](https://img.xkw.com/dksih/QBM/2011/10/17/1570320092807168/1570320098025472/STEM/f37be12ba31a43978227767c628fc979.png?resizew=29)
![](https://img.xkw.com/dksih/QBM/2011/10/17/1570320092807168/1570320098025472/STEM/3bf4b3c74c984a29b5b2d9b531714b38.png?resizew=20)
![](https://img.xkw.com/dksih/QBM/2011/10/17/1570320092807168/1570320098025472/STEM/9d36ca29a426444d91eeb7b2f9282d01.png?resizew=84)
(1) 求数列
![](https://img.xkw.com/dksih/QBM/2011/10/17/1570320092807168/1570320098025472/STEM/008bac06405d480eb207aa618fc44133.png?resizew=31)
![](https://img.xkw.com/dksih/QBM/2011/10/17/1570320092807168/1570320098025472/STEM/f37be12ba31a43978227767c628fc979.png?resizew=29)
(2) 记
![](https://img.xkw.com/dksih/QBM/2011/10/17/1570320092807168/1570320098025472/STEM/1a69dd05a3e04c148a3488dd39d7ba8d.png?resizew=73)
![](https://img.xkw.com/dksih/QBM/2011/10/17/1570320092807168/1570320098025472/STEM/2367383e58f94504872b67f0735702b6.png?resizew=59)
您最近一年使用:0次