“斐波那契”数列由十三世纪意大利数学家斐波那契发现.数列中的一系列数字常被人们称之为神奇数.具体数列为:
即从该数列的第三项数字开始,每个数字等于前两个相邻数字之和.已知数列
为“斐波那契”数列,
为数列
的前
项和,则(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adf14ebc775db2414a5a960badca8960.png)
__________ ;(2)若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c2f6dbf332a4070c05c6002e95afff2.png)
__________ .(用
表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a020ee4bcd80c4b36546c2dcaef5b3f.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/adf14ebc775db2414a5a960badca8960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/526fbe3328e0d664b838f20fc9390551.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c2f6dbf332a4070c05c6002e95afff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2020-01-31 08:21:06
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【知识点】 由递推数列研究数列的有关性质
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