已知数列
:1,1,2,3,5,8,13,……这个数列从第3项起,每一项都等于前两项之和,记
前
项和为
. 给出以下结论:①
,②
,③
,④
.其中正确的个数为( )
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4ee03eab638be1f3a50ef53502133f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ada53d97e73270afaf638d9807615f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbc4b95dd1886dade962e5108b601f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/977f2b78f3a08da23b57553d25babc4b.png)
A.1 | B.2 | C.3 | D.4 |
更新时间:2024-03-14 14:52:34
|
【知识点】 由递推数列研究数列的有关性质
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单选题
|
较难
(0.4)
解题方法
【推荐1】已知正项数列
,
满足:
,
,
,
,
表示不超过
的最大整数,则
( )
![](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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5fed58bc14caf35f081c2a7cd304091.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c9b4f764dcedeee11023817f5880b60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b03aac1e24759d379d49ad00ab46250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2ab85825d4a002600ca41bd3cd2ee7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58e3a9ec8c6f33cbecfe32a6323ef4f5.png)
A.1 | B.2 | C.3 | D.2023 |
您最近一年使用:0次
单选题
|
较难
(0.4)
解题方法
【推荐2】已知数列{an}满足an+1=sinan,n∈N*,则“a1≥0”是“任意n∈N*,都有an+1≤an”的( )
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次