细心观察如图,认真分析各式,然后解答下列问题:
,
(
是
的面积);
,
(
是
的面积);
,
(
是
的面积);
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f782d70309802445202487eee751cbdd.png)
(
为正整数)的式子填空:
_______,
_______;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/050a73bb8b76ebafba1f7e3877e65ac7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4f48b72329a258cf2c82273574a208.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7334b09e1c6156c0d1c7f8b2150e320.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6325e81fd49d815502c58aed4e68554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554a870ba0c66752f89e00ae26cc7646.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/523298e1c78c8de655f63541f63b9aa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb802b0025c1d420dee8a67b21dec546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51417ed5c9681fc9901174af61e2ec91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee6f15c6a94b97371e3b4c93c3e59bb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f782d70309802445202487eee751cbdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f5f32f8270dbaaaba8b08df4ec9d3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b89dbc751fbde0e9ba146ece02d642.png)
22-23八年级下·全国·单元测试 查看更多[5]
(已下线)第17章 勾股定理(A卷·知识通关练) -【单元测试】2022-2023学年八年级数学下册分层训练AB卷(人教版)(已下线)第1章 二次根式 章末检测卷-【帮课堂】2022-2023学年八年级数学下册同步精品讲义(浙教版)(已下线)第12章 二次根式 单元综合检测(题型专训)-2022-2023学年八年级数学下册同步精品课堂(苏科版)四川省成都市简阳市雷家学校2023-2024学年八年级上学期期中数学试题山东省日照市东港区实验中学2023-2024学年八年级下学期4月月考数学试题
更新时间:2023-01-05 22:37:59
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解答题-问答题
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【推荐1】请观察图形,并探究和解决下列问题:
(1)在第n个图形中,每一横行共有 个正方形,每一竖列共有 个正方形;
(2)在铺设第n个图形时,共有 个正方形;
(3)某工人需用黑白两种木板按图铺设地面,如果每块黑板成本为8元,每块白木板成本6元,铺设当n=5的图形时,共需花多少钱购买木板?
(1)在第n个图形中,每一横行共有 个正方形,每一竖列共有 个正方形;
(2)在铺设第n个图形时,共有 个正方形;
(3)某工人需用黑白两种木板按图铺设地面,如果每块黑板成本为8元,每块白木板成本6元,铺设当n=5的图形时,共需花多少钱购买木板?
![](https://img.xkw.com/dksih/QBM/2018/3/13/1901159021723648/1902579046416384/STEM/2bc0722823354d5995ef31ace20fa4b9.png?resizew=394)
您最近一年使用:0次
解答题-作图题
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适中
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【推荐2】已知
组正整数:
第一组:
,
,
;第二组:
,
,
;第三组:
,
,
;第四组:
,
,
;第五组:
,
,
;第六组:
,
,
;
(1)以上每组中的三个整数存在某种等量关系且各组符合一定规律,请依据规律写出第七组数并验证存在的等量关系;
(2)以任意一个大于
的偶数为一条直角边的长,是否一定可以画出一个直角三角形,使该直角三角形的另两条边的长都是正整数?若可以,请说明理由;若不可以,请举出反例.
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第一组:
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(1)以上每组中的三个整数存在某种等量关系且各组符合一定规律,请依据规律写出第七组数并验证存在的等量关系;
(2)以任意一个大于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
您最近一年使用:0次