1 . 定义运算
如下:
,如
. 若
,则x=___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e16415b61722f9961e412386e6819f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f2d62e3a5f1215cf5443bf6023009bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1caa819d683e3487be8ed0e32ebee3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0249ed6fa08992ecdf442b03fcb387e7.png)
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2 . 阅读下列材料,并完成相应的任务.
定义:如果两个一元一次方程的解之和为1,我们就称这两个方程为“美好方程”.
例如:方程
与方程
为“美好方程”.
(1)请判断方程
与方程
是否为“美好方程”,并说明理由;
(2)若关于
的方程
与方程
是“美好方程”,求
的值.
定义:如果两个一元一次方程的解之和为1,我们就称这两个方程为“美好方程”.
例如:方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a63b693f03b25b7cda90796584b1687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6e582064c4754d7c4dfd51645aadb2.png)
(1)请判断方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a6fc2b5d4ca89381355ffc0bc45f7b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2e9fabde66cf22e392f67ebef79056b.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/643eb4037eb93a15674b163258849f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9019f182da62f10744ab5d90d61616c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2024-02-24更新
|
70次组卷
|
2卷引用:湖北省仙桃市2023-2024学年七年级上学期期末数学试题
3 . 若
为整数,关于
的方程
有整数解,则整数解的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34c8c5efb9de2f3f4ba61c2d0caf6e79.png)
A.2个 | B.4个 | C.6个 | D.8个 |
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4 . 定义:若
,则称
与
是关于
的相关数.
(1)若5与
是关于2的相关数,则
________;
(2)若
与
是关于
的相关数,
,
的值与
无关,求
与
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16966ddcdafba01060154fc2b44191aa.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/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)若5与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c02eaad8e1a77cc6707db55b721fa93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/7f9e8449aad35c5d840a3395ea86df6d.png)
您最近一年使用:0次
5 . 若
是方程
的解,则m的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f054d28f3abd60087f8a7fba1f82eda.png)
A.![]() | B.2 | C.![]() | D.10 |
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6 . 解方程:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934eb47a28386883437b6fca1fb602ee.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eb248b5ed47bb25fff9ba0020129133.png)
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7 . 若代数式
与
的值互为相反数,则x的值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/563adee328a2021a7eb0e803738f0cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33cd71ad57b7bd04c3fa74bd963a8c1b.png)
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8 . 若关于
的方程
的解为
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd267c9147f7f094606f3e1bb4be5c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.2 | B.![]() | C.![]() | D.1 |
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9 . 已知:
,
.
(1)求
的值(化简后结果用含a、b的式子表示);
(2)在(1)的条件下,若
是方程
的解,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c740178111095dac787a52d95c571d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58455adefb4af2d97aa96186774e71e2.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcd52e023b34f44521b8a9574cc08db.png)
(2)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d9beb7d3659194b0daad72c23ed2da3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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10 . 如果
是关于x的方程
的解,则a的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c3ddb1328cab0e1545829500ce1f75c.png)
A.![]() | B.3 | C.![]() | D.2 |
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