1 . 设数列
满足:①
;②所有项
;③
.设集合
,将集合
中的元素的最大值记为
,即
是数列
中满足不等式
的所有项的项数的最大值.我们称数列
为数列
的伴随数列.
例如,数列1,3,5的伴随数列为1,1,2,2,3.
(1)若数列
的伴随数列为1,1,2,2,2,3,3,3,3,请写出数列
;
(2)设
,求数列
的伴随数列
的前50项之和;
(3)若数列
的前n项和
(其中
为常数),求数列
的伴随数列
的前
项和
.
![](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/b270a87d8e670809520e33c85bc3899a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dd992f0b72c282959031890e58c7810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ccd7443fe60322b99e116a523a33207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0d7559d8dfa8236ca9d4b1853fbdec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f64696f60c533ad95dc7890eb902741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f64696f60c533ad95dc7890eb902741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19db2869aeaf97debfa2e2f9a4843a7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
例如,数列1,3,5的伴随数列为1,1,2,2,3.
(1)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb1ca762c8207aaa6fcb6406d224f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(3)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac84359e567db7ab2e55b1de8342622a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](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/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7e74be91bfe4bc209da7539dbf9b72c.png)
您最近一年使用:0次
2018-04-03更新
|
759次组卷
|
3卷引用:北京市良乡附中2022-2023学年高二6月月考数学试题
2014·北京西城·二模
名校
2 . 在无穷数列
中,
,对于任意
,都有
,
. 设
, 记使得
成立的
的最大值为
.
(1)设数列
为1,3,5,7,
,写出
,
,
的值;
(2)若
为等差数列,求出所有可能的数列
;
(3)设
,
,求
的值.(用
表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0a54ddeddaa507a50af7e3f381791f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d452e25c34e15eec8393ae213911798.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69726bca10112fb049f0f1a9cb1d4a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/972201e55b52b195ea29af06b04b07c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ba9aa8f4e86ea3498ebb8a99d87e72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f64696f60c533ad95dc7890eb902741.png)
(1)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/065054f4e163585d630aa42cb6323a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b22fe6e8c6ddc1b4114bb5002049a12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57483e04fd1840c87ac5325157149877.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a89d1f32c1605cfdb8e8855051b9f6ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2e2d10a44a59e7f9f040c1750611855.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede85251c091df6dfe7d96353fa6d637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53979b1af8fd6f789ef5e0da51c9fb40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78f3248553dade7cb8c414fdae0949af.png)
您最近一年使用:0次
2016-12-03更新
|
2258次组卷
|
9卷引用:北京市房山区实验中学2022—2023学年高二上学期高中学业水平调研数学试题
北京市房山区实验中学2022—2023学年高二上学期高中学业水平调研数学试题北京市北京师范大学附属实验中学2022届高三10月月考数学试题北京市第五中学通州校区2022届高三12月统测数学试题北京市房山实验中学2023届高三上学期期中考试数学试题(已下线)2014届北京市西城区高三数学二模理科数学试卷(已下线)2014届北京四中高三数学二模理科数学试卷2017-2018北京西城161高三上期中数学2017-2018北京西城161中学高三上期中数学理真题卷北京市第一七一中学2022届高三上学期期中考试数学试题