已知
,
,
,
,…,观察并找规律,计算
的结果是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4885c7f83d013e96a81fdda90d7a1570.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5dda90621e0786f3d4679a3964b4ae7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2087b838939667f4257540da5a2fb56e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94731a95a42c0a5c57c572d3c759c2d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43502d31bf10cb442d637a3a26d92a04.png)
A.42 | B.120 | C.210 | D.840 |
更新时间:2022-10-21 09:50:42
|
相似题推荐
单选题
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适中
(0.65)
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【推荐1】“十一”黄金周期间,小佳和妈妈乘火车外出旅游,小佳希望和妈妈的座位连在一起,且能坐在靠窗的位置.如果某列火车的座位排列方式如图所示,那么下列座位号码符合小佳要求的是( )
车 窗 | 1 | 2 | 3 | 过 道 | 4 | 5 | 车 窗 |
6 | 7 | 8 | 9 | 10 | |||
11 | 12 | 13 | 14 | 15 | |||
16 | 17 | 18 | … | … | |||
… | … | … | … | … |
A.28,29 | B.45,46 | C.50,51 | D.64,65 |
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【推荐2】将一组数
,2,
,2
,
,…,2
,按下列方式进行排列:
,2,
,2
,
;
2
,
,4,3
,2
;
…
若2的位置记为(1,2),2
的位置记为(2,1),则
这个数的位置记为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35361e76a7c85d1886728c8d0200b234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4056761b8f826eeb6ad8c9a151d3c9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4056761b8f826eeb6ad8c9a151d3c9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35361e76a7c85d1886728c8d0200b234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4056761b8f826eeb6ad8c9a151d3c9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01961669cd597f61fa48e9853d678bb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
…
若2的位置记为(1,2),2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74e90e281555897abddbfc82a7a7a0aa.png)
A.(5,4) | B.(4,4) | C.(4,5) | D.(3,5) |
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