名校
解题方法
1 . 已知等差数列
满足
.
(1)求数列
的通项公式;
(2)设数列
的前n项和为
.证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0a17ebce96735aedbd171fb5365bd2b.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c60e1fe261b8548e7ec1ed04db710058.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b48c30aad10313393faca8cb30d31be2.png)
您最近一年使用:0次
2023-05-13更新
|
787次组卷
|
4卷引用:河南省洛阳市创新发展联盟2022-2023学年高二下学期5月月考数学试题
解题方法
2 . 设等差数列
的前
项和为
,且
,
.数列
满足
,
,
(1)求数列
的通项公式;
(2)求证:数列
是等比数列;
(3)求数列
(
为正实数)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/ae2e6956e0073cef684fef6a16bead0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde13a1d82174255f34cc22f8127787b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a02563c38f1e5c8fd724af9d6f22563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deda945164283569437cda6976fe35ea.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a6c852d593cb9f6bdfd9eeddb50fa3.png)
(3)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd7f41822ee607b5dde87bdb13daca84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.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
23-24高三上·湖北武汉·阶段练习
名校
解题方法
3 . 等差数列
中,
,
的前n项和为
,且
.
(1)求数列
的通项公式;
(2)证明:对任意正数k,均存在
使得
成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/562bf10d55724c77204c6953c7fbf7e2.png)
![](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/0ea7c8660dcd1f550bda5e8c5811641a.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)证明:对任意正数k,均存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf749cdadfb2d37911bdc8f3a02809e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29ba83f4cb852d35dcbb25c0f40f8bd7.png)
您最近一年使用:0次
解题方法
4 . 已知无穷等差数列
和
中,
,
,
.
(1)求
和
的通项公式;
(2)证明:
均是
中的项,
均不是
中的项;
(3)若定义集合
或
,将集合
中的元素从小到大排列组成一个新数列
,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/ebaf2a2590bb84d646957f913d78f6dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ca6f88fafa90c138d93cef87cc4b428.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2280e1db37032499be7d9f43f9b1ee08.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e26377445f0f8497b802c8d28e42094.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/189559711c2dfb3d4a03adcc085603bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)若定义集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12cba3fbabe327e39c961ce0bc113bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d6c738f0ee626885a96044da444be5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b17a9b9bb8bf6bb9865e37f204da5c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4baee584eeab5bc90bed8ee318a56b8b.png)
您最近一年使用:0次
2023-03-30更新
|
277次组卷
|
2卷引用:河北省沧州市部分学校2022-2023学年高二下学期3月月考数学试题
名校
解题方法
5 . 已知等差数列
单调递增,其前n项和为
,
,其中
,
,
成等比数列.
(1)求数列
的通项公式;
(2)设
,
的前n项和记为
,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/36ba808c24aeae6a2f34b98ae5ec04ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/359ee9d15f5390bdb02c62855451323c.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18ec386f0f3ddad65efa9fac2d5bc5d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.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
2023-01-15更新
|
260次组卷
|
2卷引用:甘肃省兰州市兰州第六中学2022-2023学年高二上学期期末数学试题
解题方法
6 . 已知数列
,
满足
.记
为
的前n项和.
(1)若
为等比数列,其公比
,求
;
(2)
为等差数列,其公差
,证明:
![](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/f03d0dd28343afd484de9f07291433f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d9b6c86435e0ceff94d8ad1cd03737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae3012337aa392709349731fb1eef5b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c3fec47d2dd2b8099d86c87b6e57de8.png)
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2023-10-07更新
|
162次组卷
|
2卷引用:甘肃省白银市靖远县第四中学2023-2024学年高二上学期10月月考数学试题
7 . (1)已知
,试用分析法证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b1411bbc505b5056e68e077d18e06b.png)
(2)等差数列
中,已知
,试求n的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b6c5526947e9bef051bc3bdf7fd186d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b1411bbc505b5056e68e077d18e06b.png)
(2)等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342ead1007636d0f9aed521b7bc73779.png)
您最近一年使用:0次
22-23高二上·上海·期中
解题方法
8 . 已知点
在直线
上,
为直线l与y轴的交点,等差数列
的公差为1(
).
(1)求数列
,
的通项公式;
(2)设
,求
的值;
(3)若
,且
,求证:数列
为等比数列,并求
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c6437c5e60fb22c44918407eb5c9d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9944bcd0c383c1d3d04c6ab90cacced9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a70b95c53fb6655721e2a8c61f5c2c.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77b3a20b653e1979a93f119ad40406d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd93dfc99f8df4a7053e7e3a6838394c.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7216b901691e2c6140379588988a479.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea6578afabc23f5d7041b88c3790dd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eda624fa223cc191d35e23f0e6cd148.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
您最近一年使用:0次
2023高二·全国·专题练习
解题方法
9 . 已知公差不为0的等差数列
满足:①
,②
成等比数列;③
.从①②③中选择两个作为条件,证明另一个成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/668144ced4514790322b1d1421f5ed65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff715e142ead0b80ecb983b455659d6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fca2cc2768794136c1e4da47d2f0873e.png)
您最近一年使用:0次
10 . (1)已知等差数列
满足
,
,数列
满足
,
.求
,
的通项公式;
(2)在数列
中,
,
,
①求证:
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/b38fda654c021e994ac899d0ecdc6955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95f293767f23d043f408e50ae88646a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07e42fd1465539b4c54a32273c52adeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)在数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ecf69901899bba130968c7a091790d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d99afdf5472fd4867e7d8a5a7b0845c6.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c7d94406136605c5bc9cd9295d6c9fa.png)
②求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d363b6982fee3bf1337d1542137a2f3d.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
2022-12-15更新
|
783次组卷
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4卷引用:新疆维吾尔自治区巴音郭楞蒙古自治州和静高级中学2022-2023学年高二上学期12月月考数学试题
新疆维吾尔自治区巴音郭楞蒙古自治州和静高级中学2022-2023学年高二上学期12月月考数学试题(已下线)专题12 数列大题专项训练第四章 数列章末重点题型归纳(4)(已下线)专题6-3 数列求和-1