名校
解题方法
1 . 已知公差大于0的等差数列
和公比大于0的等比数列
满足
.
(1)求数列
和
的通项公式;
(2)记数列
的前
项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a587116c6b3929dafef42448b5d4187.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
(2)记数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43e24c0b6a5964ad028bac5e8c10c6a6.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/1c4673f66063bad3a506f8ed7349f848.png)
您最近一年使用:0次
2024-08-04更新
|
350次组卷
|
3卷引用:江西省新余市2023-2024学年高二下学期期末质量检测数学试卷
2 . 设数列
的前
项和为
,且对于任意正整数
,都有
.
(1)求证:数列
是等比数列;
(2)设
,数列
的前
项和为
,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/ae734ad099abbb2f7efe7d7a6a4169fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d6ae907495d2290796210e2ae99d711.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778f4a19ea50206683a9fbf1ebe4febe.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36925e53ab12172c7616b6d64b608b16.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9928e46511e601913619a427ded84a3.png)
您最近一年使用:0次
2023-12-26更新
|
2018次组卷
|
6卷引用:江西省上饶市玉山县第二中学2024届高三上学期12月月考数学试题
江西省上饶市玉山县第二中学2024届高三上学期12月月考数学试题江苏省泰州中学、宿迁中学、宜兴中学2024届高三上学期12月调研测试数学试题2023-2024学年高二上学期期末数学仿真模拟试题03(新高考地区专用)(已下线)专题04 数列通项与求和技巧总结(十大考点)-【寒假自学课】2024年高二数学寒假提升学与练(人教A版2019)(已下线)重难点5-2 数列前n项和的求法(8题型+满分技巧+限时检测)(已下线)专题34 等比数列及其前n项和6种常见考法归类- 【考点通关】2023-2024学年高二数学高频考点与解题策略(人教A版2019选择性必修第二册)
名校
解题方法
3 . 在正项数列
中,已知
,且
.
(1)求数列
的通项公式;
(2)求证:
.
![](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/630bbfe697b13ef0b715e15ce477ba65.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f77d48642ebdb361e3af6c4a2a03ec8.png)
您最近一年使用:0次
2024-05-19更新
|
406次组卷
|
2卷引用:江西省宜春市第一中学2024届高三下学期第三次模拟考试数学试卷
名校
解题方法
4 . 已知正项数列
满足:对任意正整数
,都有
成等差数列,
成等比数列,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e719bd380ea9dd3ec2a20242bdf6380.png)
(1)求证:数列
是等差数列;
(2)设数列
的前项和为
,如果对任意正整数
,不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0197eeeeaafec6b1fdd7bb8509572f6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a20dfd9c14d834c66b2070c41f66eee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5b55761181faa05961286eedfebca4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e719bd380ea9dd3ec2a20242bdf6380.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4f93dca4192c87d1ac77a2456bf12e.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b01041691ad489f126f05c18ea8f0fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfd0dc83494c84b81687cf8c38736b8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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2024-01-25更新
|
455次组卷
|
3卷引用:江西省上饶市广丰贞白中学2024届高三上学期1月考试数学试题
5 . 已知数列
的首项
,且
.
(1)证明:
是等比数列.
(2)求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fc336b4a83bf6d66c4afcc431597f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4d2817ccb8c5c38af4e363d26761c86.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c7d94406136605c5bc9cd9295d6c9fa.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc4da78e341efb2df695417ffe7cbf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
6 . 已知数列
的前n项和为
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
(1)证明:
是等比数列,并求出
的通项公式;
(2)已知
,求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee0e184b6489ceb9fa3e3068bf91a855.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71d13e4dc9e1494ace25f8f1ca08e40f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2024-06-19更新
|
325次组卷
|
2卷引用:江西省上饶市广丰金桥学校2023-2024学年高二下学期期末检测数学试卷
名校
解题方法
7 . 已知在数列
中,
.
(1)求证:数列
是等差数列,并求数列
的前
项和
;
(2)在
中,角A,B,C的对边分别为a,b,c,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c86c282ebe18f330150af18b78a15b69.png)
,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3783e69ef5a6a0af566ff4e21ccf03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f47c755075eeca4dad561baea13232.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b01041691ad489f126f05c18ea8f0fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1444992828c00d485ce237c5986e65f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c86c282ebe18f330150af18b78a15b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1c8f6afdae323698cbab2c2a2c44ef9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2024-05-24更新
|
976次组卷
|
4卷引用:江西省上高二中2024-2025学年高三上学期8月月考数学试题
江西省上高二中2024-2025学年高三上学期8月月考数学试题(已下线)江西省上高二中2024-2025学年高二上学期8月月考数学试题重庆市七校联盟2024届高三下学期三诊考试数学试题(已下线)5.5 数列与其他知识的综合
名校
解题方法
8 . 已知数列
的前
项和为
,
,且
.
(1)求
的通项公式;
(2)若
,数列
的前
项和为
,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/d3a216c1a02266ea5bb508b943e51785.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c32bdd71430429aa7748f7d52d4750f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/216876de04325fd250c38c485cbc34b7.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9928e46511e601913619a427ded84a3.png)
您最近一年使用:0次
2024-02-06更新
|
253次组卷
|
4卷引用:江西省吉安市多校联考2023-2024学年高二下学期3月月考数学试题
9 . 已知无穷数列
中,
,记
,
,
.
(1)若
为2,0,2,4,2,0,2,4,…,是一个周期为4的数列(即
,
),直接写出
,
,
,
的值;
(2)若
为周期数列,证明:
,使得当
时,
是常数;
(3)设
是非负整数,证明:
的充分必要条件为
为公差为
的等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a400b5443af7580aa8f0fb7499fe362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494e60c955259d15f005106d2aed94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14634fa354408d6500ad655850e170d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8c4312e4b482794178f8b34e61a1302.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f8365233f341451598eb50525a1557a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a662a381e0867ce9d871c7a8e71f0d37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edf900c810371fb21297c15f86d8743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31ac1def558351e2e3ed1235c570530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d0252c1b2f7d2a84b5c985d19d547.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d31659f106fba3c9750661eb0e3c3eb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a8bad5d843bd5ee3a99c49c6b6311d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1591c10d6af25780ba5bfcd82f2cb366.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82e260b088f071983f254ce8f5163fcd.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf018810ca163838909e1f7e293a589d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
您最近一年使用:0次
10 . 对正常数
,若无穷数列
,
满足:对任意的
,均有
,则称数列
与
具有“
”关系.
(1)若无穷数列
,
的通项公式分别是
,
,判断数列
与
是否具有“3”关系;
(2)若无穷数列
,
是公差不相等的两个等差数列,对任意正常数
,证明:数列
与
不具有“
”关系;
(3)设无穷数列
是公差为
的等差数列,无穷数列
是首项为正数,公比为
的等比数列,试求“存在正常数
,使得数列
与
具有‘
’关系”的充要条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09881de0dc186bbcd1e60eb00159ee97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfe4fffc64388e7786db703139b43f17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)若无穷数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87cd7e9a204a619f2f612c94a2b5228.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bcbbe506132e03ad7962e201a0b0b8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
(2)若无穷数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(3)设无穷数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc59f584f053eb2d07b6f51d8a6a7e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c5d989f80848fb13b61fa877de0752.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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