已知方程组
的正确解是
小马虎因抄错C,解得
,请求出A,B,C的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc639e5af162fcecc84f32ce8cf07166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1ced59568a703a190f837621e887ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8467c8584b497aedf5ee597a9b4d33c8.png)
21-22七年级下·广东肇庆·期中 查看更多[4]
广东省肇庆市广宁县元恺学校2021-2022学年七年级下学期期中数学试题新疆维吾尔自治区乌鲁木齐市第九中学2020-2021学年七年级下学期期末数学试题湖北省十堰市房县2021-2022学年七年级下学期期末数学试题(已下线)专题02 解二元一次方程组(五大题型)(题型专练)-2023-2024学年七年级数学下册《知识解读·题型专练》(浙教版)
更新时间:2022-04-30 20:03:31
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解答题-作图题
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较易
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【推荐1】(1)已知线段
(如图),画出线段AB,使AB=2a-b.(用尺规作图,不写作法,保留作图痕迹)
![](https://img.xkw.com/dksih/QBM/2020/5/5/2456286618968064/2456959729819648/STEM/4dd7ced56a6043d2a7a56a0c7db5ff87.png?resizew=84)
(2)关于
的方程
与方程
有相同的的解,求
的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://img.xkw.com/dksih/QBM/2020/5/5/2456286618968064/2456959729819648/STEM/4dd7ced56a6043d2a7a56a0c7db5ff87.png?resizew=84)
(2)关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b083fa7553fe81b9493782c5ed06d249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f52dbf6f33d1a7cb47614e90c1b426.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解答题-问答题
|
较易
(0.85)
名校
【推荐2】如图是按一定的规律排列的方程组集合和它们解的集合的对应关系图:将方程组集合中的方程组自上而下依次记作方程组1、方程组2、方程组3、……、方程组n.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c134a1c3503dc301bb1087561d57b013.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90fdc2c2c3f48033e5e414ffa9e103c0.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/430e5b07059d320d29c1f6c2c4e475a0.png)
…… ……
![](https://img.xkw.com/dksih/QBM/2019/4/18/2185247565840384/2187912959787008/STEM/0216ed17931e4e5995e9770436482b30.png?resizew=18)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c434af369e602803d6882948e835a3.png)
(1)将方程组2、方程组3的解填入上图对应位置;
(2)请根据方程组和与它对应的解的变化规律,将方程组n和它的解直接填入上图中;
(3)若方程组
的解是
,求m的值,并判断该方程组是否符合(2)中的规律?
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c29c187b713803979fc81f2bc64a70ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c134a1c3503dc301bb1087561d57b013.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b82c72ed3155a07a76e8d378e2ee9f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90fdc2c2c3f48033e5e414ffa9e103c0.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a3cc7066de6b0f657b38d91fcd43e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/430e5b07059d320d29c1f6c2c4e475a0.png)
…… ……
![](https://img.xkw.com/dksih/QBM/2019/4/18/2185247565840384/2187912959787008/STEM/0216ed17931e4e5995e9770436482b30.png?resizew=18)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a28dac6b4989b69f63d0da53d15f93a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c434af369e602803d6882948e835a3.png)
(1)将方程组2、方程组3的解填入上图对应位置;
(2)请根据方程组和与它对应的解的变化规律,将方程组n和它的解直接填入上图中;
(3)若方程组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ef78aefa6a45dd5cdb814c52ed6ecc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/020882d2c0307f3f72c40e905314e597.png)
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