数表的第1行只有两个数字3,7,从第2行开始,先按序照搬上一行的数再在相邻两数之间插入这两个数的和,如下图所示,那么第10行的各个数之和等于__________ .
![](https://img.xkw.com/dksih/QBM/2018/6/30/1978587927404544/1980057518317568/STEM/babfc4bafec14f0fbbdf072bae10a5d3.png?resizew=272)
更新时间:2018-07-02 22:20:14
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填空题-单空题
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适中
(0.65)
【推荐1】观察下面一组等式:
,
,
,
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5815a503758f95c613bbf3c2dd1df0.png)
根据上面等式猜测
,则
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c752ebe8516e7d3327f3410473d9a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13df04b24a166f550f97b27fc03098c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98a423766fb644bce8df502d469c692a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99912045b9854dc2386329776ec2a2b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5815a503758f95c613bbf3c2dd1df0.png)
根据上面等式猜测
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b12c04191f4772187660f8e8102787.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b1b96f5050de3bc7ae53c7bf0c21e8.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
解题方法
【推荐2】记
,当
、
、
、
时,观察下列等式:
,
,
,
,
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dab783880d7aabc422916886630fc576.png)
可以推测,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65b56181fd53e8bb9b94853b0d71ad40.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f83a26d7d1b83642b4d1410eaf69af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbf4544e56821f1bdc4c67a4065083e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a0ec0971ffc6ed6ca475d24763089c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1463ee2a441bfeb8b0f272c3ae898bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ca6753e497f2b9cbe70d3bb594caa53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af7db628d0fef568c7dcc8464a8be015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dab783880d7aabc422916886630fc576.png)
可以推测,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65b56181fd53e8bb9b94853b0d71ad40.png)
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