1 . 已知数列
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/210c457ba87675015212f2e3afe4c56c.png)
,若
,则数列
的前
项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/210c457ba87675015212f2e3afe4c56c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5628a4690ca83d0dfb60a1a5c39a6aec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef70da7236ad9a7d3beeb2a9cf63c93a.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/04c2864e2ec3416cc4c081ac1f71a0af.png)
您最近一年使用:0次
2021-01-12更新
|
301次组卷
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11卷引用:【市级联考】陕西省榆林市2019届高三第二次模拟数学(理科)试题
【市级联考】陕西省榆林市2019届高三第二次模拟数学(理科)试题【市级联考】陕西省榆林市2019届高三第二次模拟试题数学(文科)试题【市级联考】福建省漳州市2019届高三下学期第二次教学质量监测数学(理)试题2019届广西来宾市高三3月模拟考试数学(理科)试题吉林省通化市梅河口市第五中学2024届高三三模数学试题广西来宾市2018-2019学年高三3月模拟考试数学文科试题(已下线)专题6.3 等比数列及其前n项和-2021年高考数学(文)一轮复习-题型全归纳与高效训练突破(已下线)专题6.3 等比数列及其前n项和(精练)-2021届高考数学(文)一轮复习讲练测安徽省合肥市肥东县高级中学2020-2021学年高三上学期第三次月考数学(文)试题广东省深圳市深圳外国语学校2024届高三上学期第二次月考数学试题甘肃省庆阳市庆城县陇东中学2024届高三上学期第五次月考数学试题
解题方法
2 . 已知数列
的前
项和为
,且
.
(1)求
的通项公式;
(2)设
,求数列
的前
项和为
.
![](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/2814be664a8e81cdbf87e24c11eb985d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b4859f39f555002c3fd9b690622d15.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
名校
解题方法
3 . 等比数列
满足
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d300b91cc9377e99780c151cd0fbf37b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc4d615cf2480a59ea61ce19893498d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c47fc8df6f62a1c1fc2bde7e49ef042.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-07-22更新
|
901次组卷
|
4卷引用:陕西省榆林市神木中学2021届高三三模文科数学试题
名校
解题方法
4 . 递增等差数列
中,
.
(1)求数列
的通项公式及前n项和
;
(2)求数列
前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/498bf8b3f75194b2c3c7bc2e55211ec8.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/741d10a85e33c5b716a564ff87821ac4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
解题方法
5 . 已知数列
的前
项之和为
,对任意的
,都有
.若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
______ ;数列
中最大的项为______ .
![](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/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c92122e93201afb7d33ea50b04e9c593.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9778016514ce3130c8e26334dd55560e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
您最近一年使用:0次
2020高三·全国·专题练习
名校
6 . 设等比数列
的前
项和为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce65ee609a275e790b5c71f7ed11cb17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.png)
您最近一年使用:0次
2020-05-19更新
|
353次组卷
|
3卷引用:陕西省榆林市绥德中学2020届高三下学期第五次模拟考试数学(文)试题
陕西省榆林市绥德中学2020届高三下学期第五次模拟考试数学(文)试题(已下线)题型07 等比数列前n项和构造新等比数列-2020届秒杀高考数学题型之数列陕西省咸阳市实验中学2019-2020学年高二上学期第一次月考数学试题
名校
7 . 设
是任意等比数列,它的前
项和,前
项和与前
项和分别为
,
,
,则下列等式中恒成立的是( )
![](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/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43f41be870e84c819362787849770519.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b9a0d7150fb24be3e28ef7f0e18be93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e5e69a1736fce183c0227c991c14810.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
8 . 数列
为递增的等比数列,且
,
,则公比
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/431dd44f3bc61adfa18da4852544ce0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed792cd9a74d706de74e79a3c2e1ca0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0d99fef1aa4dbcc6dc7b30b7d2c9a9.png)
A.![]() ![]() | B.![]() ![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-04-15更新
|
868次组卷
|
2卷引用:2020届陕西省榆林市高三第二次模拟考试文科数学试题
9 . 已知数列
为公差为d的等差数列,
,
,且
,
,
依次成等比数列,
.
(1)求数列
的前n项和
;
(2)若
,求数列
的前n项和为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ce64685821c3e55c07f151996ca8c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0748c346ed88f98e424de8edf278325.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/bc858b7a95c5006a44067022da09f667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e191086446263b7bbbd93613577c42.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64dcc86dfed7bb126a7b7bd3c9157e0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c88a7ef007c78a93e33bd77c4396626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2020-04-03更新
|
370次组卷
|
2卷引用:2020届陕西省榆林市高三下学期3月线上高考模拟测试数学(文)试题
名校
10 . 在数列
中,任意相邻两项为坐标的点
均在直线
上,数列
满足条件:
,
.
(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/2df4cb89147a85324ece512cd034bb44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e46d392f0dde0f80b3d1a31f969715f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/385275d29d8c8a7841eaeaa3dfab2cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e0d5adc7d9c5b859add88e5b4a62f07.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9659285718f2ad91c229e413b45f1fc1.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
2020-02-07更新
|
3675次组卷
|
10卷引用:2020届陕西省榆林市高三模拟第一次测试文数试题
2020届陕西省榆林市高三模拟第一次测试文数试题黑龙江省大庆铁人中学2020届高三考前模拟训练文科数学试题2020届高三1月(考点06)(文科)-《新题速递·数学》河北省承德第一中学2020届高三下学期3月线上考试数学(文)试题(已下线)冲刺卷01-决战2020年高考数学冲刺卷(山东专版)(已下线)提升套餐练01-【新题型】2020年新高考数学多选题与热点解答题组合练(已下线)专题04 求数列的通项公式(第二篇)-备战2020年高考数学大题精做之解答题题型全覆盖(已下线)考点21 求和方法(第1课时)讲解-2021年高考数学复习一轮复习笔记湖南省邵阳市邵东县第一中学2020-2021学年高三上学期第二次月考数学试题重庆市第十八中学2023-2024学年高二上学期期末数学模拟试题