1 . 已知数列
的前n项和为
,满足
.
(1)求数列
的通项公式;
(2)若
,
,设数列
的前n项和为
,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/fa04573d3fe7641fa66f3dc12c1ce651.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83de9a45d9b680da8835bac1fee9c9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53f9b54361396c6ab0c338f69b7942d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c3fec47d2dd2b8099d86c87b6e57de8.png)
您最近一年使用:0次
2021-01-13更新
|
282次组卷
|
4卷引用:吉林省白城市通榆县第一中学校2022-2023学年高二上学期期末数学试题
解题方法
2 . 在
中角
,
,
的对边分别为
,
,
,
,角
的平分线交
于点
,
.
(1)求角
的大小.
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da48400bdf008b043796cf3a550fcd67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714cc3707bba3bfdb56e251999be8592.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f27695066fdfd0357bdb22469c4a67c5.png)
您最近一年使用:0次
2021-01-17更新
|
104次组卷
|
3卷引用:吉林省乾安县第七中学2020-2021学年高二上学期期末考试数学(理)试卷
3 . 已知数列
中,
且
且
).
(1)证明:数列
为等差数列;
(2)求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6065aaa8f3f103d1bc960da8318ce35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58894a01f8ad1b4e046737e8f61c041b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e5157fd27806145d29683b9c6983d24.png)
(2)求数列
![](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)
您最近一年使用:0次
2021-01-17更新
|
1429次组卷
|
4卷引用:吉林省梅河口市第五中学2020-2021学年高三上学期1月月考数学(理)试题
名校
解题方法
4 . 已知数列{an}的前n项和Sn和通项an满足2Sn+an=1,数列{bn}中,b1=1,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12d62a020b9a14c7bd3b1ea00b280c61.png)
,(n∈N*).
(1)求数列{an},{bn}的通项公式;
(2)数列{cn}满足
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97b9d521d0db9cf460c885225c2aa61f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12d62a020b9a14c7bd3b1ea00b280c61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19fd85e83029102904571befce54e0e3.png)
(1)求数列{an},{bn}的通项公式;
(2)数列{cn}满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c2a5f8ec179b72b201c3c0a670612a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a67469e7e2c1bf78231545710959cd9b.png)
您最近一年使用:0次
2020-11-29更新
|
570次组卷
|
5卷引用:吉林省辽源市田家炳高级中学等友好学校2019-2020学年高一下学期期末考试数学(理)试题
名校
解题方法
5 . 已知点
都在直线
上,
为直线
与
轴的交点,数列
成等差数列,公差为1.
(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/5fa6678f7e2bb62d299fcadfc082a336.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)
(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/91c8fe8bcfec71a51db8b18d90afd0c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46b6d151d3f864bae873987f6db9327a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2728edc41c63346445e24273842baba4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c6d5c4c0045d46891f119a405b50e6b.png)
您最近一年使用:0次
6 . 已知Sn为数列{an}的前n项和,且满足Sn-2an=n-4.
(1)证明:{Sn-n+2}为等比数列;
(2)求数列{Sn}的前n项和Tn.
(1)证明:{Sn-n+2}为等比数列;
(2)求数列{Sn}的前n项和Tn.
您最近一年使用:0次
2020-11-16更新
|
284次组卷
|
13卷引用:【校级联考】吉林省五地六校2018-2019学年高三(上)期末数学试题
【校级联考】吉林省五地六校2018-2019学年高三(上)期末数学试题2017届安徽省江南十校高三3月联考数学(理)试卷2019届高考数学(理)全程训练:月月考二 三角函数、平面向量、数列、不等式2018年陕西省高三教学质量检测试题 理科数学(二)试题【全国校级联考】安徽省示范高中培优联盟2017-2018学年高二下学期春季联赛数学(文)试题(已下线)5-3 等比数列及其前n项和(高效训练)-2019版导学教程一轮复习数学(人教版)陕西省宝鸡市金台区2019-2020学年高三教学质量检测数学理试题2020年浙江省名校高考仿真训练卷(四)湖南省常德市一中2020-2021学年高三上学期第二次月考数学试题(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(理)一轮复习讲练测(已下线)专题07 等差数列与等比数列-2022年高考数学毕业班二轮热点题型归纳与变式演练(新高考专用)甘肃省天水市麦积区第二中学2023-2024学年高二上学期10月月考数学试题(已下线)艺体生一轮复习 第六章 数列 第27讲 等比数列【讲】
7 . 设数列
满足
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fc336b4a83bf6d66c4afcc431597f8.png)
(1)求证:数列
是等比数列;
(2)求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5776d88fe79c50af7bc6a60cb2cd3b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fc336b4a83bf6d66c4afcc431597f8.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c033d0d59a0767eea50d0afa4737e4.png)
(2)求数列
![](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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2020-02-15更新
|
1223次组卷
|
9卷引用:吉林省长春外国语学校2019-2020学年高二上学期期末数学(理)试题
吉林省长春外国语学校2019-2020学年高二上学期期末数学(理)试题2019届重庆市南开中学高考模拟(7)理科数学试题重庆市南开中学2019-2020学年高三下学期3月月考数学(理)试题四川省宜宾市第四中学校2019-2020学年高三下学期第二次月考数学(理)试题四川省宜宾市第四中学校2019-2020学年高三下学期第二次月考数学(文)试题(已下线)第02章等比数列(A卷基础卷)-2020-2021学年高二数学必修五同步单元AB卷(苏教版,新课改地区专用)湖北省恩施州高级中学2019-2020学年高一下学期期末数学试题新疆皮山县高级中学2020-2021学年高一下学期期中考试数学试题(已下线)第4章 等比数列(A卷·夯实基础)-2021-2022学年高二数学同步单元AB卷(苏教版2019选择性必修第一册)【学科网名师堂】
8 . 已知定义域为
的函数
是奇函数,其中
为实数.
(1)求实数
的值;
(2)用定义证明
在
上是减函数;
(3)若对于任意的
,不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea9f58dda6718bdd8f1b0d827ac3aa58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d701d16d9f318ee8fa779f5b961d64c.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d701d16d9f318ee8fa779f5b961d64c.png)
(2)用定义证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
(3)若对于任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/040db243c87dd1130c420b7faa8f39db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/195a5586c90849fd3450d957ec526d1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2020-03-23更新
|
228次组卷
|
3卷引用:吉林省五地六市联盟2018-2019学年高二下学期期末数学(文)试题
名校
解题方法
9 . 已知数列
的前
项和为
,点
在直线
上.
(1)求数列
的通项公式;
(2)设
,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/16418488e7184ec275286d55e709a48d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ea05a2396e436b4df62d6328dbeaddc.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b62dd0e55319e6450462c040a16840.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30136113176ba7fe660e998d0873157.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/9c3fec47d2dd2b8099d86c87b6e57de8.png)
您最近一年使用:0次
2019-08-02更新
|
1572次组卷
|
3卷引用:吉林省松原市宁江区实验高级中学2018-2019学年高一下学期期末数学试题
吉林省松原市宁江区实验高级中学2018-2019学年高一下学期期末数学试题安徽省毛坦厂中学2018-2019学年高一下学期期末考试数学(理)试题(已下线)4.3 对数-2021-2022学年高一数学尖子生同步培优题典(人教A版2019必修第一册)
名校
10 . 已知函数
,数列
的前
项和为
,且满足
.
(1)求
的值;
(2)猜想数列
的通项公式,并用数学归纳法加以证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bcc6436de66b3254001d1859b3f7d70.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/1e65757cd42e63879fca56bba0f45c6e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec99c57bf7997bd93e1ed8f48d5af9a.png)
(2)猜想数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
2020-04-08更新
|
307次组卷
|
3卷引用:吉林省吉林市桦甸市第四中学2018-2019学年高二下学期期末数学(理)试题