如图,在平面直角坐标系
中,一次函数
的图象
分别与
轴、
轴交于
、
两点,若正比例函数的图象
与
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/28/1e7d01d9-0c08-4343-bb6d-3ed86b52a265.png?resizew=345)
(1)求
的值;
(2)求
的面积;
(3)一次函数
的图象为
,且
、
、
不能围成三角形,请写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee9de2ab436e867724089fd1db1910a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17e77fd5594344b1901d9da81fe26ce2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/28/1e7d01d9-0c08-4343-bb6d-3ed86b52a265.png?resizew=345)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
(3)一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6767830cc1811f0f4ea5a008fdc7e723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9fce9427c9b17e4d3cda0c3ff3e2e14.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/c9fce9427c9b17e4d3cda0c3ff3e2e14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
更新时间:2022-07-26 16:15:25
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【推荐1】如图,在平面直角坐标系中,抛物线C:
两条切线的函数解析式分别为
:
,
:
.
(2)抛物线C与x轴的两个交点分别为A、B,切线
切抛物线于点C,
、
交于点D.
①求
的值;
②点E为抛物线C上一动点,过E分别作
、
的平行线分别交抛物线C于G、F,连接
.点H为
的中点.试判断点
的纵坐标是否是定值?若是定值,请求出这个定值,若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/114b8e409e3e83567eee12eb0b7bd86c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/937739c67e2ff1e5ae21fb73aff74251.png)
(2)抛物线C与x轴的两个交点分别为A、B,切线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b076e0add5df35950a0c10b07141131e.png)
②点E为抛物线C上一动点,过E分别作
![](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/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
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【推荐2】如图①,直线l:
与x,y轴分别相交于A,B两点,将
绕点O逆时针旋转
,得到
,过点A,B,D的抛物线P叫做l的关联抛物线,而l叫做P的关联直线.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/17/5bb4c6a6-40a9-440d-8aeb-208563d42a4e.png?resizew=455)
(1)若P:
,则l表示的函数解析式为_____.
(2)如图②,若l:
,G为
中点,H为
中点,连接
,M为
中点,连接
.若
,请求出l表示的函数解析式.
(3)如图③,若l:
,P的对称轴与
相交于点E,点F在l上,点Q在P的对称轴上.当以点C,E,Q,F为顶点的四边形是以
为一边的平行四边形时,直接写出点Q的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd88eeed0530a091338d725b331378d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9a6eeeebf3cff569578d7366b755aa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/17/5bb4c6a6-40a9-440d-8aeb-208563d42a4e.png?resizew=455)
(1)若P:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9ccda65e65bc2afc790471696e08e33.png)
(2)如图②,若l:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d74ca77c575a39592e73845bdecb58aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc91a53e2534ce7034372b0add103eac.png)
(3)如图③,若l:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4de869ae6b6dc5b79fcae3de540b30bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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【推荐3】某公司经营杨梅业务,以3万元/吨的价格向农户收购杨梅后,分拣成A、B两类;B类杨梅深加工后再销售,A类杨梅的包装成本为1万元/吨,根据市场调查,平均销售价格y(单位:万元/吨)与销售数量x(x≥2)之间的函数关系如图,B类杨梅深加工总费用s(单位:万元)与加工数量t(单位:吨)之间的函数关系是s=12+3t,平均销售价格为9万元/吨,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/2b7d98f5-9a56-4c00-9340-7162e53ca2ac.png?resizew=188)
(1)直接写出A类杨梅平均销售价格y与销售量x之间的函数关系式;
(2)第一次,该公司收购了20吨杨梅,其中A类杨梅有x吨,经营这批杨梅所获得的总利润为w万元,求w关于x的函数关系式;
(3)第二次,该公司准备投入132万元资金,请设计一种经营方案,使公司获得最大利润,并求出最大利润.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/2b7d98f5-9a56-4c00-9340-7162e53ca2ac.png?resizew=188)
(1)直接写出A类杨梅平均销售价格y与销售量x之间的函数关系式;
(2)第一次,该公司收购了20吨杨梅,其中A类杨梅有x吨,经营这批杨梅所获得的总利润为w万元,求w关于x的函数关系式;
(3)第二次,该公司准备投入132万元资金,请设计一种经营方案,使公司获得最大利润,并求出最大利润.
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【推荐1】在平面直角坐标系xOy 中,直线
与x轴交于点A,与过点B(0,2)且平行于x轴的直线l交于点C,点A关于直线l的对称点为点D.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/29/cb69032d-76a5-42ac-ac88-4d857ba9a41b.png?resizew=218)
(1)求点C、D的坐标;
(2)将直线
在直线l上方的部分和线段CD记为一个新的图象G.若直线
与图象G有两个公共点,结合函数图象,求b的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fceb9eb57ca36db386ffafeda213599c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/29/cb69032d-76a5-42ac-ac88-4d857ba9a41b.png?resizew=218)
(1)求点C、D的坐标;
(2)将直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fceb9eb57ca36db386ffafeda213599c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15206717884bea18dfe2d7099489f849.png)
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【推荐2】如图,在平面直角坐标系中,直线y=﹣0.5x+2与x轴,y轴分别交于点A和点B,与直线y=x交于点C、P(m,0)为x轴上一动点(P不与原点重合),过P作x轴垂线与直线y=x和y=﹣0.5x+2分别交于点M和点N,过N作x轴的平行线交直线y=x于D.
(1)求C点坐标;
(2)求当MN=OB时,m的值;并直接写出此时四边形COPN的面积= ;
(3)直接写出当DN=2NP时,m的值= ;
(4)过D作y轴平行线交直线AB于点E,P点在运动过程中,
的值= .
(1)求C点坐标;
(2)求当MN=OB时,m的值;并直接写出此时四边形COPN的面积= ;
(3)直接写出当DN=2NP时,m的值= ;
(4)过D作y轴平行线交直线AB于点E,P点在运动过程中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aff5bdf787036c79a27a8ac12ffd62e6.png)
![](https://img.xkw.com/dksih/QBM/2021/11/20/2855110765240320/2855871042969600/STEM/18309fc8-ce84-43c0-a913-9da7af1a37e7.png)
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【推荐1】如图,在平面直角坐标系中,点O为坐标原点,点,且a、b满足
.
(1)如图1,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
(2)如图2,若P为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d071d008cdc313f6ed16a602f8a9669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
(3)若P为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c3823e92936ceeb262d71348dfe2fca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce920e4c8c46c8d5cb713225ff445f2.png)
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【推荐2】已知:如图1,在平面直角坐标系中,直线
:y=-x+4与坐标轴分别相交于点A、B与
:y=
x相交于点C.
![](https://img.xkw.com/dksih/QBM/2019/5/30/2214916586266624/2217187210403840/STEM/4464ee92fbb44f748e929479894ab75b.png?resizew=310)
(1)若平行于y轴的直线x=a交直线
于点E,交直线
于点D,交x轴于点M,且ED=2DM,求a的值;
(2)如图2,点P是第四象限内一点,且
BPO=135°,连接AP,探究AP与BP之间的位置关系,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df621d466946fffca5e6ab71f13fb48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/443b04f04149a91c70bf08ae2974482a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://img.xkw.com/dksih/QBM/2019/5/30/2214916586266624/2217187210403840/STEM/4464ee92fbb44f748e929479894ab75b.png?resizew=310)
(1)若平行于y轴的直线x=a交直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df621d466946fffca5e6ab71f13fb48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/443b04f04149a91c70bf08ae2974482a.png)
(2)如图2,点P是第四象限内一点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/665ffcdb7c57534dc184cc840471f2f5.png)
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