如图,正方形
的边长为2,其面积标记为
;以
为斜边作等腰直角三角形,以该等腰直角三角形的一条直角边为边向外作正方形,其面积标记为
;…;按照此规律作下去,则
的值为( )
![](https://img.xkw.com/dksih/QBM/2021/8/30/2797381515108352/2797963732164608/STEM/3084b7ed-1ee0-4738-8e16-69e6c924b1b5.png?resizew=192)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b5576e5d9b20988390682e42195df1.png)
![](https://img.xkw.com/dksih/QBM/2021/8/30/2797381515108352/2797963732164608/STEM/3084b7ed-1ee0-4738-8e16-69e6c924b1b5.png?resizew=192)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2021-08-31 12:14:41
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【推荐1】下图中的图形都是由同样大小的点按一定的规律组成的,其中第1个图形一共有9个点,第2个图形一共有16个点,第3个图形一共有23个点,第4个图形一共有30个点……则第9个图形中点的个数为( )
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【推荐2】如下图,每一幅图中均含有若干个菱形,第①幅图中含有1个菱形;第②幅图中含有5个菱形;……按这样的规律下去,则第⑦幅图中含有的菱形的个数为( )
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