观查下表三行数的规律,回答下列问题:
(1)第
行的第四列数
______________,第
行的第六列数
______________;
(2)若第
行的某一列的数为
,则第
行与它同一列的数为______________(用含
的式子表示);
(3)已知第
列的三个数的和为
,试求
的值.
第![]() | 第![]() | 第![]() | 第![]() | 第![]() | 第![]() | ... | |
第![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ... |
第![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ... |
第![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ... |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
(2)若第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(3)已知第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0446646c4247722b4b935284d1dbc34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
更新时间:2019-04-25 22:25:53
|
【知识点】 用代数式表示数、图形的规律解读
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】已知
且n为自然数,
可写成n个连续奇数的和,即
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e8dea70fa36b4fe815ec149cead458f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18014e43c43dd0f0b437bdc5842ffb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ff6971fa91db4862141d1d115097b0.png)
……
(1)按上述规律;
______,
写成奇数和时,最大奇数为______;
(2)按上述规律:
可写成连续奇数和的形式是
______;
(3)应用上面规律求:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ceef1abeeef220b4fe5f7d96feedd90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e8dea70fa36b4fe815ec149cead458f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18014e43c43dd0f0b437bdc5842ffb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ff6971fa91db4862141d1d115097b0.png)
……
(1)按上述规律;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c4f544af8449c50ada1273e511d044.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da1530990c1f71b849e21378bc309299.png)
(2)按上述规律:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ceef1abeeef220b4fe5f7d96feedd90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/152a6437e4a84f7921ed58d03f6bc05f.png)
(3)应用上面规律求:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aef951cb02377d1723018e15ecefd4cc.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图是由一些小木棒搭成的图案.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/29/0a318538-97b2-4e80-ac11-07798de0565c.png?resizew=307)
(1)摆第4个图案用________根小木棒.
(2)按照这种方式摆下去,摆第
个图案用________根小木棒.
(3)计算一下摆681根小木棒时,是第几个图案?
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/29/0a318538-97b2-4e80-ac11-07798de0565c.png?resizew=307)
(1)摆第4个图案用________根小木棒.
(2)按照这种方式摆下去,摆第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(3)计算一下摆681根小木棒时,是第几个图案?
您最近一年使用:0次