名校
1 . 已知非零的数列
满足:
,
,(
)
(1)求证:
;
(2)若
,对于任意的正整数
,
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d754bc529cfab94af50384ef686b191d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d05fc98ebd295f20d2dc2d5a275acbf5.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99a0ef5a6597df17e3e99d138a4c67b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdd059d4fe42bd9836a0229aeb127601.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
名校
解题方法
2 . 已知
中,
分别是角
的对边,有
.
(1)求角
的大小;
(2)若等差数列
中,
,
,设数列
的前
项和为
,
求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f570a35ee91d04ac3587acd8fef3d1f.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ddbb7d30849c255910247ebda792932.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afbfd6b761451716ba3d7130c93497ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b40cdec22a05616d2464a4178759ec2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbb0a0bb77044ff507eb050821f1f16.png)
您最近一年使用:0次
2017-12-11更新
|
1015次组卷
|
6卷引用:黑龙江省双鸭山市第一中学2019-2020学年高一下学期期末考试数学(文)试题
名校
解题方法
3 . 设数列{an}的前
n项的和
,n=1,2,3…
(Ⅰ)求首项a1与通项an;
(Ⅱ)设
,n=1,2,3…,证明:
.
![](https://img.xkw.com/dksih/QBM/2018/1/23/1866683500314624/1899029747367936/STEM/7efca23c288f4947bd1082fc14454dce.png?resizew=12)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f413f805f6b89e5d3016763537daa137.png)
(Ⅰ)求首项a1与通项an;
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a2335e6b3f9e909d19efee454a76f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/767eed81f255e9a2182abf8905e0649b.png)
您最近一年使用:0次
2018-03-10更新
|
783次组卷
|
3卷引用:黑龙江省佳木斯市第一中学2018-2019学年高一下学期期中数学试题
名校
4 . 已知数列
满足
,
,数列
满足
,
.
(1)证明:
是等比数列;
(2)数列
满足
,求数列
的前
项的和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b973cef9460d84bec30961a9d3443cd.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/4c94e7e73992aa9ff5b779b1d382671a.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d483eb4433fee05a5810a276433b1742.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4918e780861d676138eb35a9e7cb5c6d.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)
您最近一年使用:0次
2018-01-11更新
|
1150次组卷
|
11卷引用:黑龙江省齐齐哈尔市实验中学2018届高三上学期期中考试数学(理)试题
黑龙江省齐齐哈尔市实验中学2018届高三上学期期中考试数学(理)试题2017届东北三省三校高三第二次联合模拟理数学试卷安徽省黄山市屯溪第一中学2019-2020学年高二上学期入学摸底考试数学试题(已下线)专题16+选择性必修第二册综合练习-2020-2021学年【补习教材·寒假作业】高二数学(人教A版2019)(已下线)专题10+必修5综合练习-2020-2021学年【补习教材·寒假作业】高二数学(理)(人教A版)(已下线)专题10 必修5综合练习四川省成都市石室中学2023-2024学年高三上学期开学考试文科数学试题四川省成都市石室中学2023-2024学年高三上学期开学考试理科数学试题河南省实验中学2023-2024学年高三上学期第一次月考数学试题天津市第四十五中学2023-2024学年高三上学期第一次月考数学试题(已下线)河南省实验中学2023-2024学年高三上学期第一次月考数学试题变式题15-18
名校
解题方法
5 . 已知数列
是等比数列,
为数列
的前
项和,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2768cdebea12f6987b9bbacc3b98a0d.png)
(1)求数列
的通项公式.
(2)设
且
为递增数列.若
求证:
![](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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2768cdebea12f6987b9bbacc3b98a0d.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc4b783f25498ce9159fdb464c1bd12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb4493d13ba247dbb663c69890283b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00b6cc3899210644fefa97ae95a9e6ff.png)
您最近一年使用:0次
6 . 已知数列
满足
.
(1)求数列
的通项公式;
(2)设
为数列
的前
项和,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0e2498e43ee11bd1b8ca3e9a20529e.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afd56af540299f8910f9662964b84d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7449c1ec085bb6c227bf8d74d955166f.png)
您最近一年使用:0次
11-12高三·新疆乌鲁木齐·阶段练习
名校
7 . 已知正项数列
的前n项和满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2710bd50aef98ca7802dfe3778d0d806.png)
(1)求数列
的通项公式;
(2)设
是数列
的前n项的和,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3df934e2f21879573743c670c833497.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2710bd50aef98ca7802dfe3778d0d806.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3df934e2f21879573743c670c833497.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac358315e0d8e3374de7c701bb0782b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f2e8d0f82168e0b436c70a59936f33c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f84a41c1b094b7ac17719f1957dd5f4.png)
您最近一年使用:0次
8 . 已知数列
满足
,
,
.
(1)求证:数列
是等差数列;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d971b3e74014e2a8eb7e90f4529b42f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/452441c97433c6dee7d6a8dd4aaa7133.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18fada8fb229e188018a3fa2f28d2e96.png)
您最近一年使用:0次
解题方法
9 . 已知数列
前n项和为
,满足
.
(I)证明:
是等比数列,并求
的通项公式;
(Ⅱ)数列
满足
,
为数列
的前n项和,若
对正整数a都成立,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca8ac08b1dda83e8b171d4937c40ce66.png)
(I)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9c990312950f89a934d7d9f04b3b942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(Ⅱ)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73dbd4237bb15da40edea5940696f398.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fc5b76208b0e4655a7b5470f72b413f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3145bd4fce70d22aac659dd2519aa685.png)
您最近一年使用:0次
2016-12-04更新
|
1037次组卷
|
2卷引用:黑龙江省绥化市望奎县第一中学2021-2022学年高二上学期期末数学试题