1 . 设数列
的前
项和为
,且
,其中![](https://staticzujuan.xkw.com/quesimg/Upload/formula/570c1864116e50b35e66aa644d22545c.png)
(1)证明:数列
是等比数列.
(2)设数列
的公比
,数列
满足
,
(![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c556d15135004c53c6b57a2e70db9df.png)
求数列
的通项公式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.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/ede7367099b2a4ffce48ae4ae240de3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/570c1864116e50b35e66aa644d22545c.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/353ae6ded3c5d266190843f3853c565f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a24e6bcf49b8e45531a2d4e4c70c181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05e935a9ce314267f1082aa2278cab26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c556d15135004c53c6b57a2e70db9df.png)
求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
您最近一年使用:0次
名校
解题方法
2 . 数列
中,
,
,则
( )
![](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/2e878d5c8051b956f19694aa6bc68728.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0db9b5bec6c73846ed31eba4c46b52a9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
13-14高一下·福建泉州·期末
名校
解题方法
3 . 已知数列
的前
项和为
,且
,在数列
中,
,点
在直线
上.
(1)求数列
,
的通项公式;
(2)记
,求
.
![](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/2e56a5c8eae02541dea219021e6479c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8ddf33a5293de591b8f96ed7787aae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23fc11a3a7592c68b20f93bdde2ed3f.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a40dc2db1721429b8c8b0bf43a285b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2018-10-07更新
|
1839次组卷
|
4卷引用:广东省揭阳市惠来县第一中学2018-2019学年高二上学期期中考试数学(文)试题
广东省揭阳市惠来县第一中学2018-2019学年高二上学期期中考试数学(文)试题(已下线)2013-2014学年福建省南安一中高一下学期期末考试数学试卷江西省上饶市上饶县中学2017-2018学年高一下学期期末考试数学(理)试题甘肃省武威市民勤县第一中学2018-2019学年高二上学期期中数学(文)试题
名校
4 . 数列
满足
且
,则使
的
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2186d2b5a00c0bb782829c904dd04390.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e7f395f753da570e66cfcf3f5df752.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce0c552dd01df426ec32618848861b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
A.5 | B.6 | C.7 | D.8 |
您最近一年使用:0次
2017-12-10更新
|
338次组卷
|
2卷引用:广东省中山市第一中学2017-2018学年高二上学期第二次统测数学(理)试题
名校
5 . 设
为等差数列
的前
项和,其中
,且
.
(1)求常数
的值,并写出
的通项公式;
(2)记
,数列
的前
项和为
,若对任意的
,都有
,求常数
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/381576e698a46df8c497e6b5f8346ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9702210b6b8e952923000c7054d3e189.png)
(1)求常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4784813fdbc497211da75d35cc64448d.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/073a97c932092920a95114f4e3225b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa56f212749a82bb40d47e6250f99a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2018-06-01更新
|
1095次组卷
|
5卷引用:【全国百强校】广东省佛山市第一中学2017-2018学年高一下学期期中考试数学试题
【全国百强校】广东省佛山市第一中学2017-2018学年高一下学期期中考试数学试题2015届浙江省金华十校高三下学期高考模拟(4月)理科数学试卷2016届浙江省绍兴市一中高三9月回头考理科数学试卷浙江省杭州地区四校2018-2019学年高三上学期联考数学试题(已下线)第22讲 数列的单调性与最值问题-2022年新高考数学二轮专题突破精练
名校
6 . 已知数列
是等差数列,数列
是公比大于零的等比数列,且
,
.
(1)求数列
和
的通项公式;
(2)记
,求数列
的前
项和
.
![](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/7c5a7a17a394e868e0acd1803a9ab795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b52bc73290a07efcd49381cbbd568d.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/000f01319364c59dee948848fc4de4c9.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/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
2018-02-01更新
|
503次组卷
|
4卷引用:广东省北大附中深圳南山分校2020届高三上学期期中数学(文)试题
名校
7 . 已知数列
和
满足
,
,
,且
.
(1)求数列
的通项公式;
(2)设
,
为数列
的前
项和,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc5fbadcd9f8504b2758b63ca8cd1fff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d5ec9ad92f37e64eccce922ab1b14e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15ff259bff098430a6512d0e4f6fb2d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b49f2285bd15a50aad7b8c4ffd67a176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.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
2017-10-18更新
|
586次组卷
|
7卷引用:广东省珠海市珠海二中、斗门一中2018届高三上学期期中联考数学(文)试题
名校
8 . 数列
满足
,且
.
.
.
成等比数列. 设
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8be1a3888434d19d579904f15fd37d77.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/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd71bc7e6668f90f259ad0b06dd60c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e680f28daa101a42903ef44cf6e6894a.png)
(1)求数列的通项公式;(亲,题目没有让亲求数列
的通项公式)
(2)设,求数列
的前n项和.
您最近一年使用:0次
名校
9 . 等差数列
满足
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae1aa4e8e17fdbdbcdbde2eba366dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9bbe98100c8067ff36ac536d043a85.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-09-06更新
|
791次组卷
|
2卷引用:广东省广州市广东仲元中学2016-2017学年高二下学期期末考试数学(文)试题
解题方法
10 . 已知正项数列
的前
项和为
,且
,
.
(1)求数列
的通项公式;
(2)求
的值.
![](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/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb97681a1d5ab1c4c10a6b82bb221ff8.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e58922fcef6e5e0f57b9a4016e253e06.png)
您最近一年使用:0次
2017-05-30更新
|
1008次组卷
|
2卷引用:广东省汕头市2017届高三第三次模拟考试数学(文)试题