名校
1 . 不等式
的解集是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/820f8a7585bb45eb5cd4e9bf1d98af84.png)
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2023-08-15更新
|
54次组卷
|
3卷引用:山东省菏泽市曹县2022-2023学年八年级下学期期末数学试题
2 . 按要求完成下列题目:
(1)解方程组:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/042ab2f2bfd5e73883a22703b47512e6.png)
(2)已知方程组
的解x,y满足
,求m的取值范围.
(1)解方程组:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/042ab2f2bfd5e73883a22703b47512e6.png)
(2)已知方程组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7153ebce9564d928c860613e39ac607b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d51bc86ef0fd8775caa010c754e53b3d.png)
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3 . 已知关于x、y的方程组
,给出下列结论:①
是方程组的解;②当a取某一值时,x,y的值可能互为相反数;③若
,则
;④x,y的值都为自然数的解有3对.其中正确的有_____________ .(填序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa0e98d214007ba72e7580118d34576.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16135974f92c5494b112763c34bf36ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b21208364124b5c477b2ff8df1c2e8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8769227eb8a66e64441b58b91293b7f0.png)
您最近一年使用:0次
2023-08-13更新
|
129次组卷
|
2卷引用:山东省临沂市蒙阴县2022-2023学年七年级下学期期末数学试题
4 . 计算:
(1)
;
(2)解不等式
,并把解集表示在数轴上.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b8ce5f8d3ea580ab1e7d48714a87397.png)
(2)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aab65a3c3fd90468b843c1ac142c322.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/22/496be05b-0c6c-4f0e-bbc0-a7cea27d04c5.png?resizew=297)
您最近一年使用:0次
5 . (1)解不等式
;
(2)解关于
,
的方程组
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f379a4bb34037a4223153ef70661c6a.png)
(2)解关于
![](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/73b8e39785daab94793e15ef9bb768b2.png)
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6 . (1)解不等式:
,并把它的解集在数轴上表示出来;
(2)解不等式组:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d1676aa01433bd8ce400556408f3b6a.png)
(2)解不等式组:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3793970267e0d2b14772dd3024f1045e.png)
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7 . (1)解不等式
,并将解集在数轴上表示出来;
(2)解不等式组
,并将解集在数轴上表示出来.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ae811be7ca4d3c7dd7bfe8f7316f020.png)
(2)解不等式组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca61a837a46e0e83ed2e5c824bc56057.png)
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8 . (1)解不等式:
;
(2)解方程组:
;
(3)解不等式组.并把解集在数轴上表示出来:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3c4de90a0a6483697e1a957ed076c19.png)
(2)解方程组:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f6ca4809e7a1f923e9cfd1c9016b06e.png)
(3)解不等式组.并把解集在数轴上表示出来:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77fdf604aae90959aea1511924e70dbe.png)
您最近一年使用:0次
9 . 定义新运算:对于任意实数a,b,都有
,例如:
,那么不等式
的解集为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f48352970709f89eca5c2c02e6c742f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c598569348b5db0413d495567d5d7cf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0928fed6c44198a5cd19cc9bc073c82b.png)
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10 . 如图,已知在平面直角坐标系中有三个点
,
,
.请解答以下问题:
(1)在坐标系内描出点
,
,
,画出以
,
,
,三点为顶点的三角形;
(2)若三角形
的面积记为
,在
轴上存在点
,使以
,
,
三点为顶点的三角形的面积为
,满足
,请求出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32366143230ca122894a4bada7c7b96d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8290733c83028f6e03753f66ac263ba3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f6314d6f44c7d35b2b4b5cdc041d344.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/17/aecf7620-a0b3-4884-8dac-48cb01a280cc.png?resizew=220)
(1)在坐标系内描出点
![](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/c5db41a1f31d6baee7c69990811edb9f.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/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd92673ca9fbc7d26f10f92665abc4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/938fd4a3f814db60717cdba9582d0485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c6cfbe589feebb9e804d167667e4645.png)
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