题型:多选题
难度:0.65
引用次数:4603
题号:11122086
设首项为1的数列
的前
项和为
,已知
,则下列结论正确的是( )
![](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/6baebe9343d867a156c3e3809c51466c.png)
A.数列![]() |
B.数列![]() ![]() |
C.数列![]() |
D.数列![]() ![]() ![]() |
更新时间:2020-07-31 23:14:45
|
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解题方法
【推荐1】已知等比数列
的公比为2,且
,
,
成等差数列,则下列命题正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a69480294b121a9800f24ea1e14fe20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
A.![]() | B.![]() ![]() ![]() |
C.![]() | D.![]() ![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
多选题
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解题方法
【推荐2】对于正项数列
,定义:
为数列
的“匀称值”.已知数列
的“匀称值”为
,
的前n项和为
,则下列关于数列
的描述正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05a5c67bc1c4d2949b147514c370fc03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aa1a5998497a6322a47ac2aa32cc8d5.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/83cf38189d5cbf627d2b82ac0eb76006.png)
A.数列![]() |
B.数列![]() |
C.![]() |
D.记![]() ![]() ![]() ![]() |
您最近一年使用:0次
【推荐1】已知数列的
前n项和为
,
,
,若
,
(
是常数),则( )
![](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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aab858914340d1393772445b79222969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d12d0bd9afdd4e53ff37f5bfcaa1106c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/056535f67fe0444eaf09ba3d562d1e70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
A.数列![]() | B.数列![]() |
C.![]() | D.![]() |
您最近一年使用:0次
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【推荐2】分形几何学是数学家伯努瓦·曼德尔布罗在20世纪70年代创立的一门新的数学学科,分形几何学不仅让人们感悟到数学与艺术审美的统一,而且还有其深刻的科学方法论意义.按照如图甲所示的分形规律可得如图乙所示的一个树形图:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/4/16351e29-6bed-412a-8dd1-cb1be7eb9432.png?resizew=353)
记图乙中第
行白圈的个数为
,黑圈的个数为
,则下列结论中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/4/16351e29-6bed-412a-8dd1-cb1be7eb9432.png?resizew=353)
记图乙中第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
A.![]() |
B.![]() |
C.当![]() ![]() |
D.![]() |
您最近一年使用:0次
【推荐1】在数列
中,若
,则称
为“和等比数列”.设
为数列
的前
项和,且
,则下列对“和等比数列”的判断中正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d325b8e9c05f16e6d98cb9f6d9544e75.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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
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解题方法
【推荐2】已知数列
满足
,
,记数列
的前
项和为
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d6a6786b2d1d6930b1b7711f07bd6ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0522be0e1b5b16ffe6d9bc03a5ad386.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)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
多选题
|
适中
(0.65)
解题方法
【推荐1】已知数列
的前
项和为
,且满足
,数列
的前
项和为
,且满足
,则下列说法中正确的是( )
![](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/4f034b38bbf182abad5150d4ea57e34f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.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/8b1056b64ff05b2c3140c84bcc4e8dcc.png)
A.![]() | B.数列![]() |
C.数列![]() | D.若![]() ![]() |
您最近一年使用:0次
多选题
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解题方法
【推荐2】记
为数列
的前n项和,
为数列
的前n项积, 已知
,则下面正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846fa57d92d6ad44d6a0cafad1e71ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeddada3794584dbed16ccf7bb50d000.png)
A.数列![]() | B.![]() ![]() |
C.![]() | D.若![]() ![]() ![]() |
您最近一年使用:0次