已知数列
是以1为首项,2为公差的等差数列,
是以1为首项,2为公比的等比数列,设
,
,则当
时,n的最大值是________ .
![](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/89b55ed8b92142a7e12bedfb6c88c705.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/561666f51f0e479b1c511c7870b3a66d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/254db7a87ad580b68a31564d649508c7.png)
2022高三·全国·专题练习 查看更多[2]
(已下线)解密11 数列的前n项和及其应用(分层训练)-【高频考点解密】2022年高考数学二轮复习讲义+分层训练(全国通用)广东省河源市龙川县第一中学2022-2023学年高二上学期期末数学试题
更新时间:2022-03-10 16:28:08
|
相似题推荐
填空题-单空题
|
适中
(0.65)
解题方法
【推荐1】若
为数列
的前
项和,且
,
,
,则数列
的通项公式为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c77546024d4365da1cf8dedfec36e542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fc336b4a83bf6d66c4afcc431597f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffa01f03fb074bff35b35e07047d11b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
您最近一年使用:0次
【推荐2】设数列
的前
项和为
,若
,
,且
是等差数列.则
的值为______ .
![](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/f6065aaa8f3f103d1bc960da8318ce35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f67e6f9f75fe5e80873eac20abc83b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dea1dd4ffcb4cf0697ca43079f6a1f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f6097326bdd27bac0f0c2468db4f8e5.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
解题方法
【推荐1】数列
的首项为
,前
项和为
,若
成等差数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.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/db5714abe72dbf3fc3c8da134f4b5552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
您最近一年使用:0次
【推荐2】数列
中的所有项排成如下数阵:
已知从第二行开始每一行比上一行多两项,第一列数
,
,
,
成等差数列,且
,
,从第二行起,每一行中的数按从左到右的顺序均构成以
为公比的等比数列.
①
;
②
在第
列;
③
;
④
.
以上正确结论的序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e481f3de02f0cb0131d63053d37d94b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/680a5028252a7cfbef7c99c02e19a529.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f782d70309802445202487eee751cbdd.png)
已知从第二行开始每一行比上一行多两项,第一列数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d8e8f821111de8075e5c3dfb22a5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/170b74434f9726be33895bbd3bfec4f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea00d10c496ccacb5b25c9574d6cdb09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83fd1dadbe1b2cafc0cf8b5bb8b18ed9.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5148ddbd19b14e7b3e9f944f2fb762.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0170847a91fb6b83741b7ee4b277eafb.png)
以上正确结论的序号是
您最近一年使用:0次
填空题-双空题
|
适中
(0.65)
【推荐1】梅花1朵花开五瓣,加花蕊部分,抽象后绘成图(1),得端点数
.若再以五片花瓣为蕊作五个缩小版梅花,记为缩小1次.抽象后绘成图(2),得梅花数
,端点数
.以此类推,缩小4次后有梅花_________ 朵,缩小3次后共得端点数________ 个?
![](https://img.xkw.com/dksih/QBM/2022/3/16/2937539728515072/2938915943211008/STEM/cdb8914f-58ff-4395-afcf-a9ea79c805bc.png?resizew=109)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ecf69901899bba130968c7a091790d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a8d7ec3afb812286ad33dd69d80c99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0e4dee6496d38112bf21e5819c8da8b.png)
![](https://img.xkw.com/dksih/QBM/2022/3/16/2937539728515072/2938915943211008/STEM/cdb8914f-58ff-4395-afcf-a9ea79c805bc.png?resizew=109)
![](https://img.xkw.com/dksih/QBM/2022/3/16/2937539728515072/2938915943211008/STEM/449414fd-c3a9-4b73-a946-e4fd74e49f4c.png?resizew=379)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
名校
【推荐2】在数列
中,已知
,则数列
的前
项和为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4e70b360f988fdbd92300ab22c4613.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0977671712508c2448941620be1b2b8c.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/dc4e70b360f988fdbd92300ab22c4613.png)
您最近一年使用:0次
【推荐1】数列
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e98d45d736f583422603aa4152e36572.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60667566b1766fd52f56d88fdbcbcdcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e98d45d736f583422603aa4152e36572.png)
您最近一年使用:0次
【推荐2】已知数列
满足
,
,令
,则数列
的前100项和为___________ .
![](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/0b5fb43d7740264c34b340657d99ca24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/774651b4ac04db1067ebb18d43018809.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
您最近一年使用:0次