.若两个一次函数:
,
问x取何值时,
>
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b6cf1959414abeb4981dcd6121ac8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
17-18八年级下·全国·课后作业 查看更多[3]
北师大版数学八年级下册第二章第五节一元一次不等式与一次函数同步练习(已下线)类型四 解不等式组及其解集-2021年《三步冲刺中考·数学》(陕西专用)之第2步大题夺高分(已下线)专题2.3 一元一次不等式的解法(知识讲解)-2020-2021学年八年级数学下册基础知识专项讲练(北师大版)
更新时间:2018-03-31 11:53:54
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【知识点】 根据两条直线的交点求不等式的解集解读
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解答题-问答题
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【推荐1】已知直线l1:y=x+n﹣2与直线l2:y=mx+n相交于点P(1,2).
![](https://img.xkw.com/dksih/QBM/2019/6/9/2222023230103552/2223304741478400/STEM/3bbdd3c5d8964949bc30a06cfeee2126.png?resizew=162)
(1)求m,n的值;
(2)请结合图象直接写出不等式mx+n>x+n﹣2的解集.
(3)若直线l1与y轴交于点A,直线l2与x轴交于点B,求四边形PAOB的面积.
![](https://img.xkw.com/dksih/QBM/2019/6/9/2222023230103552/2223304741478400/STEM/3bbdd3c5d8964949bc30a06cfeee2126.png?resizew=162)
(1)求m,n的值;
(2)请结合图象直接写出不等式mx+n>x+n﹣2的解集.
(3)若直线l1与y轴交于点A,直线l2与x轴交于点B,求四边形PAOB的面积.
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解答题-问答题
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适中
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【推荐2】如图,直线
:
与
轴交于点
,与
轴交于点
,与直线
:
交于点
,点
为
轴上一动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/20/4f7c90d4-e8fe-4582-868a-d608068c8b77.png?resizew=343)
(1)求直线
的解析式;
(2)当
取何值时,
;
(3)若点
坐标
,过点
作直线
轴,分别交
,
于点
,
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed06ccefffc165f9c77250cd28301d8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e95e84f5c91c910aaafc5e74dbfbdf59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a4d8e0f539ec84b3b97dc230522018f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aa855d14474ab8fae48e6c9517fc4d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a361033ccafba49035737ad1d75de82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/20/4f7c90d4-e8fe-4582-868a-d608068c8b77.png?resizew=343)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f99df1a7b58018125b99578b779342.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd243fab0af865af67a2ab817e909cf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52cbeb9b1c1d637b903cf3e5c7f730f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e856c15c61d7cb6ebd8daef542a4e7f.png)
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