观察以下一列数:3,
,
,
,
,…,以此类推,第n个数是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59ab85c075a09d55d69e159e4abb268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/738c2eb3b99133f96c55b643911d2f28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fe26e5673a3af533756977a52122a72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8e3d1d508b86f4ae14078e4c64a72f.png)
更新时间:2021-12-31 10:16:06
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【推荐1】观察下列两行数若第
个数:
1,3,5,7,9,11,13,15,17,…;
1,4,7,10,13,16,19,22,25….
探究发现:第1个相同的数是1,第2个相同的数是7,…若第
个相同的数是103,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
1,3,5,7,9,11,13,15,17,…;
1,4,7,10,13,16,19,22,25….
探究发现:第1个相同的数是1,第2个相同的数是7,…若第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
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【推荐2】观察下列有序数对:
、
、
、
、……根据你发现的规律,第100个有序数对是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/631386549c0cec5981a1da47b05e5d25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23ef007adff8e4d63ae8b95d7be7df5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da06f8a83d76944a77894e176f17f247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd2ef7f9d3449c0289aaeb5b92534bcb.png)
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