2022高三·上海·专题练习
解题方法
1 . 对于数列
,如果存在最小的一个常数
,使得对任意的正整数恒有
成立,则称数列
是周期为
的周期数列.设
,数列前
项的和分别记为
,则
三者的关系式___________ ;已知数列
的通项公式为
,那么满足
的正整数
=___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7c1a8a6121a6f52535b121c6304e5b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b2b94cbf8f1acc77ed2618d9ba5756a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9b6de041bc82fee85c8d78272a49069.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80d04c40711df685486acacfff234fa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d917c6c2bc767e1e63b90854c231a290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d917c6c2bc767e1e63b90854c231a290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a118735e2feb0440e055b5ee511cea7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9534ed1c74894c735ffa3c71df721343.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2 . 等差数列
中,已知
,…,则公差为_____ ,首项为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80e5552518eb04699bb09c3152754cfb.png)
您最近一年使用:0次
3 . 已知
,且
,当
时, ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070d1ea22a92808dad7489438c239629.png)
_____ ;若把
表示成
的函数,其解析式是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070d1ea22a92808dad7489438c239629.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b2d084a225b8bab36d6ea8a11c4f2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675b3df823f61115cbf1be15d7edf932.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070d1ea22a92808dad7489438c239629.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070d1ea22a92808dad7489438c239629.png)
您最近一年使用:0次