如表定义函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/649d9e192f6feb8f85a53bae2f101cfd.png)
数列
中,
,
,
,3,4,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afd21f4cb498101d26b4aaa2e1a6addc.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/649d9e192f6feb8f85a53bae2f101cfd.png)
1 | 2 | 3 | 4 | 5 | |
4 | 5 | 1 | 2 | 3 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13ee40e6cfa757f60396a5a93202c4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2d3df37e73a8abea815f37dbb3fff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afd21f4cb498101d26b4aaa2e1a6addc.png)
更新时间:2024-05-24 15:33:49
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【推荐1】数列
中,
,以后各项由公式
给出,则
等于_____ .
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【推荐2】意大利数学家斐波那契以兔子繁殖为例引入“兔子数列”,即1,1,2,3,5,8,13,21,34,55,89,144,233,…,也称为斐波那契数列.在实际生活中,很多花朵(如梅花、飞燕草等)的花瓣数恰是斐波那契数列中的数,斐波那契数列在物理、化学等领域也有着广泛的应用.在斐波那契数列
中,
,
,
.已知
为该数列的前
项和,若
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【推荐1】定义“等积数列”,在一个数列中,如果每一项与它后一项的积都为同一个常数,那么这个数列叫做等积数列,这个常数叫做该数列的公积.已知数列
是等积数列且
,公积为10,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c612fb2fed7c255a981cff9013063f4f.png)
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