给定正整数m,t(
),若数列A:
满足:
,
,
,则称数列A具有性质
.
对于两个数列B:
;C:
,
定义数列
;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e1666128b812bc56253aee5932dada0.png)
(1)设数列A具有性质
,数列
的通项公式为
(
),求数列
的前四项和;
(2)设数列
(
)具有性质
,数列B满足
,
,
,
且
(
).若存在一组数列
,使得
为常数列,求出m所有可能的值;
(3)设数列
(
)具有性质
(常数
),数列B满足
且
(
).若存在一组数列
,使得
为常数列,求k的最小值.(只需写出结论)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e731fd8ce3511a486bbe95e7199450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da18ad56af5e38b1a5b73f44ba198fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a406d53fd6ffd9ee6cd914f5e2b0a9bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db2e48e217357ba34d190e07a6149e85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20cb8986f17cfca98e7faa063abc09f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef30011e8c2425db431204436e16629.png)
对于两个数列B:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a974a6a4d453dbb22a7b599e36f451d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aae1beb8a070d3672795b2cf64ec1da6.png)
定义数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d805b6e79f2bd12ea9deda3e14261a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e1666128b812bc56253aee5932dada0.png)
(1)设数列A具有性质
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/708011e87fae90efc444a7477512aac0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a8100f98999e472945ab7050af50d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce69cd33d105ce280170f0cd0513026.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e819b87f90651d89fcd258c276294e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00725492cf521a4277f03c364998a4cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c17c7608edaf9a0fa498674d5c729ae7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e96fafcc7b7f783d436f853449208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75fcabace2d41a5fb549da9d88c3ad33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd4cf909f2febeea7d169459d0cf0bcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99fe300fb6c2065f7a3783d24d9c0010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1109ca176d2be47347f68a3de238abd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc9d48660f696fc51b97c89fa55d6f4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed97ab77f50ae6311b37a0678ead43d5.png)
(3)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e819b87f90651d89fcd258c276294e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00725492cf521a4277f03c364998a4cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7ee076644544f8a5f9ad2ae537ba7de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d438267fddcd02afff8e73c6c3fec8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4502c640ee65eb3f11364fb461c69e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef78e554041f64aecdc9ca4e037b58c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1109ca176d2be47347f68a3de238abd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc9d48660f696fc51b97c89fa55d6f4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed97ab77f50ae6311b37a0678ead43d5.png)
更新时间:2021-01-22 22:28:27
|
【知识点】 数列新定义
相似题推荐
解答题-证明题
|
较难
(0.4)
名校
解题方法
【推荐1】若数列
满足
,其中
,则称数列
为M数列.
(1)已知数列
为M数列,当
时.
(ⅰ)求证:数列
是等差数列,并写出数列
的通项公式;
(ⅱ)
,求
.
(2)若
是M数列
,且
,证明:存在正整数n.使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a07614926587f57bc5f341c4f97f4d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec574b71bbd7671223f8c833c8c8b61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ec1a744042c32d0a851f98fafaa81f3.png)
(ⅰ)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/362832fa3d3c13c1eafd565349d66dce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/115da54f93de5e89d1e7f443fccb61f8.png)
(ⅱ)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0992722f5002aeafa39d25c6b5f4644b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21085fbd6c4b34588f17fc466c845ffe.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a789a9be1723bfbd38ae538a9f39dc1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ce64685821c3e55c07f151996ca8c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/446e8a7985d4d3dd95c70dc4aad67861.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
解题方法
【推荐2】若对任意的正整数
,总存在正整数
,使得数列
的前
项和
,则称数列
是“回归数列”.
(1)前
项和为
的数列
是否是“回归数列”?并请说明理由;
(2)设
是等差数列,首项
,公差
,若
是“回归数列”,求
的值;
(3)是否对任意的等差数列
,总存在两个“回归数列”
和
,使得
(
)成立,请给出你的结论,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3693c7c942afef5517a3c18997c878df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(1)前
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d255ea8e125b603d6b640bdf4a804922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d8bbb4a09e0ac86bbae46222a90841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
(3)是否对任意的等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cb2db37e079b735acc41ea3035139e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ab958eede2dbad749ba70bb230c88fb.png)
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