如图,已知直线
经过点
、
,且平行于直线
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/25/41985844-62ba-4aad-9b4f-0e602ac6b9b7.png?resizew=193)
(1)求直线
的表达式,并写出点B的坐标;
(2)如果直线
经过点B,与y轴的正半轴相交于点C,使得
的面积为6,求直线
的表达式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b56fce57a2c337e1d6dbf16502955b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef24cfe5e0073facd197023ebacc24b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcf9786589f75af450bd99d6783ad715.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a8dffc3be62e9a9a4d7379650291dd4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/25/41985844-62ba-4aad-9b4f-0e602ac6b9b7.png?resizew=193)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
(2)如果直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
2023八年级下·上海·专题练习 查看更多[1]
(已下线)核心考点01 一次函数-【满分全攻略】2022-2023学年八年级数学下学期核心考点+重难点讲练与测试(沪教版)
更新时间:2023-04-23 20:07:06
|
【知识点】 几何问题(一次函数的实际应用)解读
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】已知一次函数
的图像与x轴交于点A,与y轴交于点B(0,2),且与正比例函数
的图像交于点C(
,4)
![](https://img.xkw.com/dksih/QBM/2015/4/7/1573829856501760/1573829862825984/STEM/0903d8f8966d42c684b5e8f54c28acb3.png)
(1)求
的值;
(2)求一次函数
的表达式;
(3)求这两个函数图像与
轴所围成的△AOC的面积.
![](https://img.xkw.com/dksih/QBM/2015/4/7/1573829856501760/1573829862825984/STEM/de01df17af95472d8abb43d80abbe9a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73ac1756e6cc3266bd7198a024f871af.png)
![](https://img.xkw.com/dksih/QBM/2015/4/7/1573829856501760/1573829862825984/STEM/268529bb328c4dd490b22dad0d96a7af.png)
![](https://img.xkw.com/dksih/QBM/2015/4/7/1573829856501760/1573829862825984/STEM/0903d8f8966d42c684b5e8f54c28acb3.png)
(1)求
![](https://img.xkw.com/dksih/QBM/2015/4/7/1573829856501760/1573829862825984/STEM/268529bb328c4dd490b22dad0d96a7af.png)
(2)求一次函数
![](https://img.xkw.com/dksih/QBM/2015/4/7/1573829856501760/1573829862825984/STEM/de7cc9bb27714c96bfff783bfc54fbd3.png)
(3)求这两个函数图像与
![](https://img.xkw.com/dksih/QBM/2015/4/7/1573829856501760/1573829862825984/STEM/41918ef16b5a42d2b065c729764ea3da.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,平面直角坐标系中,直线AB:y=−x+b交y轴于点A(0,4),交x轴于点B.
![](https://img.xkw.com/dksih/QBM/2019/8/5/2262160814211072/2262211851599872/STEM/b8d951e2317d4b35aa9c9f04df226100.png?resizew=186)
(1)求点B的坐标;
(2)直线l垂直平分OB交AB于点D,交x轴于点E,点P是直线l上一动点,且在点D的上方,设点P的纵坐标为n.
①用含n的代数式表示△ABP的面积;
②当S△ABP=8时,求点P的坐标;
(3)在(2)中②的条件下,以PB为斜边作等腰直角△PBC,求点C的坐标.
![](https://img.xkw.com/dksih/QBM/2019/8/5/2262160814211072/2262211851599872/STEM/b8d951e2317d4b35aa9c9f04df226100.png?resizew=186)
(1)求点B的坐标;
(2)直线l垂直平分OB交AB于点D,交x轴于点E,点P是直线l上一动点,且在点D的上方,设点P的纵坐标为n.
①用含n的代数式表示△ABP的面积;
②当S△ABP=8时,求点P的坐标;
(3)在(2)中②的条件下,以PB为斜边作等腰直角△PBC,求点C的坐标.
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