关于
,
的二元一次方程组
,
,
是常数),
,
.
(1)当
时,求c的值;
(2)若a是正整数,求证:仅当
时,该方程有正整数解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/226df15ebbc0c88d1660abb8e233ed3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/154c0fe2aaaa1f7c3bdde6db950e6583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3d441ddca6d9972549b35d21082728a.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d140a932f0037cecb252bddca559b232.png)
(2)若a是正整数,求证:仅当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
2022八年级上·全国·专题练习 查看更多[9]
(已下线)专题5.1 认识二元一次方程组(能力提升)-2022-2023学年八年级数学上册《同步考点解读·专题训练》(北师大版)(已下线)专题2.2 二元一次方程组-【帮课堂】2022-2023学年七年级数学下册同步精品讲义(浙教版)(已下线)专题2.3 二元一次方程(组)(巩固篇)(专项练习)-2022-2023学年七年级数学下册基础知识专项讲练(浙教版)(已下线)专题2.1 二元一次方程(组)(知识讲解)-2022-2023学年七年级数学下册基础知识专项讲练(浙教版)(已下线)专题8.3 二元一次方程(组)(巩固篇)(专项练习)-2022-2023学年七年级数学下册基础知识专项讲练(人教版)(已下线)专题8.1 二元一次方程(组)(知识讲解)-2022-2023学年七年级数学下册基础知识专项讲练(人教版)(已下线)专题10.1 二元一次方程(组)(知识讲解)-2022-2023学年七年级数学下册基础知识专项讲练(苏科版)(已下线)专题10.3 二元一次方程(组)(巩固篇)(专项练习)-2022-2023学年七年级数学下册基础知识专项讲练(苏科版)(已下线)8.1 二元一次方程组-2022-2023学年七年级数学下册《考点·题型·技巧》精讲与精练高分突破系列(人教版)
更新时间:2023-01-05 16:50:03
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【推荐1】某市准备安装完成7600辆共享单车投入市场.由于抽调不出足够熟练工人,公司准备招聘一批新工人.生产开始后发现:1名熟练工人和4名新工人每天共安装28辆共享单车:5名熟练工人每天装的共享单车数与8名新工人每天安装的共享单车数一样多.
(1)求每名熟练工人和新工人每天分别可以安装多少辆共享单车;
(2)若公司原有熟练工
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的代数式表示
;②直接写出符合题意的
值.
(1)求每名熟练工人和新工人每天分别可以安装多少辆共享单车;
(2)若公司原有熟练工
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/013ff238b30139800565214f8a09499f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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【推荐2】综合与深究
对实数
,
,我们定义一种新运算:
(其中
,
常数).例如:
,
.已知
,
.
(1)
___________,
___________.
(2)已知
,
为非负整数,求关于
,
的方程
的解.
(3)若关于
,
的方程组
的解满足
,且
为非负整数,求
的值.
(4)若关于
的不等式
恰好有3个正整数解,求n的取值范围.
对实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc84cb150c430d9717bb0abb4b56617b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb244529d701e70cec293cf99f13d02d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d6a814f01a61be61afdb49ae4d44657.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53ab6b988a359486ffb6c180fd0ae7bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d0d94f83a884ede40274138dd687225.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dce6469195062537eba4c8176d4ef76.png)
(3)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62f2bb836416f5573ed50857f1967fbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6fa0bb61ce60310f18cb95bf2e83c8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(4)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3411a0be95f933817752cf65bbea01c0.png)
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名校
【推荐2】已知方程组
的解满足
为非正数,
为负数
(1)求
的取值范围
(2)化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91679e154f766bad2a6963da2ffee9d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a974be616703a5802c0c0024428fdcd3.png)
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