1 . 解方程:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c49fb853321dff9b5822f70b9c0e835c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff19029e747017a16ac71d2431e11a0.png)
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2 . 已知关于x的方程
与
有相同的解,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/439797b56fbe53a01a47ae42711a5fc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c08d86dc26eaacbd62b4baae1700c32e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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2024-01-29更新
|
372次组卷
|
6卷引用:江西省新余市2023-2024学年七年级上学期期末数学试题
江西省新余市2023-2024学年七年级上学期期末数学试题福建省莆田市哲理中学2023-2024学年七年级上学期第二次月考数学试题(已下线)专题04 一元一次方程-【寒假自学课】2024年七年级数学寒假提升学与练(北师大版)(已下线)专题03 一元一次方程-【寒假自学课】2024年七年级数学寒假提升学与练(人教版)(已下线)七年级数学期末模拟卷02(人教版七上全册)-学易金卷:2023-2024学年初中上学期期末模拟考试山东省 枣庄市 滕州市鲍沟镇鲍沟中学2023-2024学年上学期七年级数学期末模拟试题
3 . 阅读与理解:
已知
是关于x的多项式,记为
.我们规定:
的导出多项式为
,记为
.例如:若
,则
的导出多项式
.
根据以上信息,回答问题:
(1)若
,则它的导出多项式
______;
(2)设
是
的导出多项式.
①若
,求关于x的方程
的解;
②已知
且关于x的方程
的解为正整数,求正整数a的值.
已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c964e149ebd8bd5b2307f9b9e803caf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826308511448f7b791edf4199c690768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826308511448f7b791edf4199c690768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa3a3fc366487b798363daeeb3643ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11a22c453d9041febde25582b463e642.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/046b388177cf781f9a1418c0cc971ece.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826308511448f7b791edf4199c690768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/711ea620e3108f5dc10b0f9d91ec96d6.png)
根据以上信息,回答问题:
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ecbf35914439493aeb2d8a8a10db63c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588056ae7548b5743371671a0162a83f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11a22c453d9041febde25582b463e642.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826308511448f7b791edf4199c690768.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d21130a942cc6726347d6ed4849ae99b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29ac95d3e3ed182968bc20a499ac0064.png)
②已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d06d3a8489b26c5a53f8fbbdfec1c0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338d548991aa77674c0fbee0db98cf3c.png)
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4 . 用方程解答:x的5倍与2的和等于x的3倍与4的差,求x.
将下列解答过程补充完整:
列方程为______;
解方程,移项:______(依据______);
解得:______.
将下列解答过程补充完整:
列方程为______;
解方程,移项:______(依据______);
解得:______.
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5 . 我们定义一种新运算:
.例如:
.
(1)则
______;
(2)求
的值;
(3)若
,求x的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75a56c3314561bb4b8aea493c28418e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7817ed88b57c3a4305e14bbb59ca89a5.png)
(1)则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e5c9fdfe742f03f7119a35b42075ba3.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e0fc365b38c20be55084db1b171f426.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c9c93a00ecbaaeab5ee97551572107.png)
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6 . 我们定义:对于有理数数
和
,若
,则称
,
互为“和积友好数”.
如:因为
,所以
和
互为“和积友好数”.
(1)下列各组数中,互为“和积友好数”的是________;(填序号)
①
和
②
和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
(2)若
和
互为“和积友好数”,求
的值;
(3)若
和
互为“和积友好数”,求式子
的值.
![](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/132bc768c61ab195768601a0be02222a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
如:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba0a85d5f49927683c0ee7b6be573475.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
(1)下列各组数中,互为“和积友好数”的是________;(填序号)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3389f53711264b0acba3ba6019f8b908.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13ce3ebd1112220c639562739f1f9d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b5a9de8a72dda70e3eefeb0a408ffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)若
![](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/abebf509b2cf0ef4578696dc4b313472.png)
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7 . 若
、
、
是数轴上三点,且
不与
,
重合,点
表示的数为
,点
表示的数为3,点
表示的数为
,当其中一点到另外两点的距离相等时,则
的值可以是______ .
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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8 . 已知:
是关于
的一元一次方程
的解,则
的值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbf219f14937617cdcec772818233744.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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9 . 下面是小友同学解方程
的过程如下,请仔细阅读,并解答所提出的问题:
解:去分母,得
,①
去括号,得
,②
移项,得
,③
合并同类项,得
,④
系数化为1,得
,⑤
(1)该同学的解答过程从第______步开始出错;
(2)写出正确的解答过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8eda7b48a5cef7ea4bc6239bb2e6c21.png)
解:去分母,得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32e1bb7ab926008ef9ad04907da384e.png)
去括号,得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70a7470103aa836640cf4d192c009f7c.png)
移项,得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9a0c4386bfb13ef0d404d114540bef.png)
合并同类项,得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b8afa4a9e7c3f343849291cb6081cb.png)
系数化为1,得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(1)该同学的解答过程从第______步开始出错;
(2)写出正确的解答过程.
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10 . 解一元一次方程:
(1)
;
(2)
;
(3)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f42ece3da011d23c40b77815fcf15f63.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26cf9de9172ccb4843b04a96b46f9c48.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6edcece7c2f9f0fa21b6e56f62214735.png)
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