我国宋朝数学家杨辉在他的著作《详解九章算法》中提出“杨辉三角”(如图),此图揭示了
(
为非负整数)展开式的项数及各项系数的有关规律.
例如:
,系数为1;
,系数分别为1,1;
,系数分别为1,2,1;
,系数分别为1,3,3,1;
…
请依据上述规律判断:若今天是星期三,则经过
天后是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/22/76c85361-22c0-4a60-9837-575691da9182.png?resizew=166)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9216a0f9d6e65ea4937ab7bf102c5db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
例如:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8671f6f58d8826780a264619fa7ff391.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e601e5001c5bdb76028516156040fa40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02d351a97edcc0783d8d7a02d041bdb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee85d22b9fd3c1afea0688617132365.png)
…
请依据上述规律判断:若今天是星期三,则经过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0da747579e86cf3a6305c45b89d4a133.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/22/76c85361-22c0-4a60-9837-575691da9182.png?resizew=166)
A.星期四 | B.星期五 | C.星期六 | D.星期天 |
更新时间:2024-03-24 18:30:19
|
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单选题
|
适中
(0.65)
【推荐1】已知
,
,
,
,
,
,
,
,……,
,
,
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e5dadfc7d9b12bea102cc0ce5bfcc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3939cb6a7baabdf0060ea4533ae7d8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d3f85a97b488ddabcdf5db1ac6ac899.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f716327da42585d3da289a0e912924ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72fb23981678146b53fa4ceca743bf67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/162fe3cb0b4956952412886b724c8ec6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a14e196eae272218ba621447d8293b68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb24d7044cbcaa3e7113e3fb697ebe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4b24400905ef312d131e24040d6b475.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6edae06b6371830cd897ac48be0d4d4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cbd6307765dbad0765ef1e5f5702e7b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】将正整数按照如图规律排列:
第一层:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
第二层:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69b3c1bbfafba434f956f4eee466c429.png)
第三层:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4af434b22597f0bd35234932c6a4997e.png)
第四层:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c748e40ba21ac5063d3bccaa57ef278.png)
······
在这个数字宝塔中,请问
在第( )层.
第一层:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
第二层:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69b3c1bbfafba434f956f4eee466c429.png)
第三层:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4af434b22597f0bd35234932c6a4997e.png)
第四层:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d0b71b8d2c183154221f717ce09077b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da45c443af7994a26ffa9d8894e7262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5453184e251cfe787b5965cd38426962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180ea775f2af05650404d764384e7faa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b184c94e38f1e5dbe750b2168c2a37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c748e40ba21ac5063d3bccaa57ef278.png)
······
在这个数字宝塔中,请问
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151e5633a5d0cc30b254167e3dda5803.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次