1 . 已知数列
满足
,
.
(1)设
,证明:数列
是等差数列;
(2)记
为等差数列
的前
项和,若对任意的
,不等式
恒成立,求实数
的最大值.
![](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/716947ad5146bee895551e1d3bd739fb.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7d3d55a85012933f91c5d8d27d8801d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.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/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5774db0f3d93a81784fd70e7f8f079a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2021-09-12更新
|
456次组卷
|
2卷引用:四川省成都市蓉城名校联盟2021-2022学年高二上学期理科数学入学试题
名校
解题方法
2 . 已知数列
满足
,
.
(1)证明:数列
是等差数列,并求数列
的通项公式;
(2)记
,求
的前n项和
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6155cfa8bb4168d4f4fc271dd9bdd8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02700430e0696cf6ada8c6fef8b98eab.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec3e74fcd0b38bb7bbe6f0d8d2d4a256.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/335179c51c2b8c32a9844ee2d614ad37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
2022-04-04更新
|
1854次组卷
|
5卷引用:四川省宜宾市第四中学校2022-2023学年高三下学期开学考试数学(理)试题
四川省宜宾市第四中学校2022-2023学年高三下学期开学考试数学(理)试题四川省宜宾市第四中学校2022-2023学年高三下学期开学考试数学(文)试题黑龙江省哈尔滨第九中学2022届高三第二次模拟考试数学(理)试题(已下线)4.4 求和方法(精练)-【一隅三反】2023年高考数学一轮复习(基础版)(新高考地区专用)云南省曲靖市罗平县第一中学2021-2022学年高二下学期期中数学试题
名校
解题方法
3 . 已知等差数列
的前
项和为
,且
,
.
(1)求
;
(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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47dce0a1fe55239f8017915d53669ecb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b6a06993302797ce9ad5bc97381d3fd.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8050391385b496e9c059201e4f12600a.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/c215db1d8f69757118ad405b78035628.png)
您最近一年使用:0次
2021-08-03更新
|
1545次组卷
|
8卷引用:四川省资中县第二中学2022-2023学年高二上学期开学考试理科数学试题
4 . 已知数列
满足
,且
,
.
(1)求数列
的通项公式;
(2)若
,求数列
的前
项和
;
(3)设
,记数列
的前
项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/633e5b29060ba8615f5f7cb1e207ffff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/527bd6adefbb15deb6ad829d7584d072.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6df1e8c28789ee186157ec527a7f5199.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)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e6df8a8cd81dffa64bcd405c6d595d.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37c5620fc14efc95fc38c8c3e1792c97.png)
您最近一年使用:0次
2021-08-07更新
|
861次组卷
|
3卷引用:四川省眉山市仁寿第一中学南校区2021-2022学年高二上学期入学考试数学试题
四川省眉山市仁寿第一中学南校区2021-2022学年高二上学期入学考试数学试题四川省成都市蓉城名校联盟2020-2021学年高一下学期期末联考理科数学试题(已下线)4.3.3 等比数列的前n项和(2)-2021-2022学年高二数学同步培优训练系列(苏教版2019选择性必修第一册)
名校
解题方法
5 . 在
中,角A、B、C的对边分别为a、b、c,面积为S,已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ab46f5c3a111557d38c49e10fa99388.png)
(1)求证:
成等差数列;
(2)若
求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ab46f5c3a111557d38c49e10fa99388.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f5573b30734d65648f61c0a94c98de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe67aaeb1c5456a7f0f0535ca96b061.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次
名校
解题方法
6 . 设等差数列
的前
项和为
,且
,
.
(1)求数列
的通项公式;
(2)若数列
满足
,证明:
.
![](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/41629c3f22946d4784fe97b34fb4be00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c5d5827f7c1c8b2130f4884855449f8.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e28565811a31f4d907a7ec9986a0f5f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21389b2b27730a9f999052650f2921a8.png)
您最近一年使用:0次
2020-10-22更新
|
702次组卷
|
6卷引用:2021年四川省成都市新都区高三摸底测试理科数学试题
名校
解题方法
7 . 已知数列
,
满足
,
,
,
的前
项和为
,满足
.
(1)证明数列
是等差数列;
(2)证明数列
是等比数列;
(3)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/950c6303c2ec03e48137be8addf9245c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.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/846fa57d92d6ad44d6a0cafad1e71ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2586b5112a36c8371c461d968411a41e.png)
(1)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
(2)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e3f946894e21775f9d2b4219ed627eb.png)
(3)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45fe06f5150e8cf0f2196ea014221ec2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
名校
解题方法
8 . 已知数列
的前
项和为
,
.
(1)证明数列
为等比数列并求其通项公式;
(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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18bb7c1d0429dbea3455011f99013350.png)
(1)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ff6b6adbc714ccb1f6e5fdbad66e05b.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
2020-09-21更新
|
364次组卷
|
4卷引用:四川省绵阳南山中学2020-2021学年高二上学期开学考试数学试题
名校
解题方法
9 . 设数列
是公差不为零的等差数列,其前
项和为
,
,若
,
,
成等比数列.
(1)求
及
;
(2)设
,设数列
的前
项和
,证明:
.
![](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/a9adde0d99f886ea5c079b2eceeec93f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9adde0d99f886ea5c079b2eceeec93f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c1089a0089ca31c92b9093c8dadedf.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/e672c3d231081d12e44a4211e5ac60bf.png)
您最近一年使用:0次
2020-04-16更新
|
760次组卷
|
3卷引用:四川省泸州市泸县第五中学2020-2021学年高三上学期开学考试数学(理)试题
名校
10 . 已知点
都在直线
上,且
为直线
与
轴的交点,数列
成等差数列,公差为
.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8db3cc31c6307625b438b4189e5641b4.png)
(1)求数列
,
的通项公式;
(2)若
,问是否存在
,使得
成立;若存在,求出
的值,若不存在,说明理由.
(3)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/996cb65789d15fb61e32122ef8fa5218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c6437c5e60fb22c44918407eb5c9d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dace86986ffbf59a49b3f840e244e630.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8db3cc31c6307625b438b4189e5641b4.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd3e0a927f2d327d24417b28dda37b6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f755f93f5eeb8721453b99432c49ffa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eae9a486603c42d48942cb3268fd2d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/996cb65789d15fb61e32122ef8fa5218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4da1984143f2db165c241cdec0fc7e4a.png)
您最近一年使用:0次
2020-03-30更新
|
99次组卷
|
2卷引用:四川省树德中学2018-2019学年高二上学期入学考试数学试题