在平面直角坐标系中,直线y1=kx+b经过点P(2,2)和点Q(0,﹣2),与x轴交于点A,与直线y2=mx+n交于点P.
(1)求出直线y1=kx+b的解析式;
(2)当m<0时,直接写出y1<y2时自变量x的取值范围;
(3)直线y2=mx+n绕着点P任意旋转,与x轴交于点B,当△PAB是等腰三角形时,点B有几种位置?请你分别求出点B的坐标.
(1)求出直线y1=kx+b的解析式;
(2)当m<0时,直接写出y1<y2时自变量x的取值范围;
(3)直线y2=mx+n绕着点P任意旋转,与x轴交于点B,当△PAB是等腰三角形时,点B有几种位置?请你分别求出点B的坐标.
![](https://img.xkw.com/dksih/QBM/2019/6/11/2222892858572800/2228278347177984/STEM/d2bc10cb-2c62-4fb3-8693-447a27a68849.png?resizew=165)
更新时间:2019-06-18 15:06:48
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【推荐1】平面直角坐标系
中,直线
与直线
交于点
.
,
的值;
(2)直线
与直线
,
分别交于
,
两点,当
时,若以
,
,
,
为顶点的四边形是平行四边形,请直接写出点
的坐标.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea99cc8e5f83f1ac6714e8cfd5e6ac7c.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)
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【推荐2】如图,直线
与
轴,
轴分别交于点
,点
,点
的坐标为
,且
.
(1)求直线
解析式;
(2)如图,将
向右平移6个单位长度,得到
,求线段
的长;
(3)求(2)中
扫过的面积.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d3ad78201b2858b555ad2b39aad367b.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)如图,将
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e2b1ec36430f70e72ba22d28655ae6.png)
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(3)求(2)中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd2981bf2261343f905ec1b5355a3c4.png)
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【推荐1】如图,AB是⊙O的直径,OC是半径,延长OC至点D.连接AD,AC,BC.使∠CAD=∠B.
(1)求证:AD是⊙O的切线;
(2)若AD=4,tan∠CAD=
,求BC的长.
(1)求证:AD是⊙O的切线;
(2)若AD=4,tan∠CAD=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
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【推荐2】如图,矩形ABCD中,点P是线段AD上一动点,O为BD的中点,PO的延长线交BC于Q.
![](https://img.xkw.com/dksih/QBM/2019/7/27/2256041898926080/2257417060458496/STEM/c00a125f69ec456c9d3b16f3f39a0271.png?resizew=170)
(1)求证:四边形PBQD是平行四边形;
(2)若AD=8cm,AB=6cm,P从点A出发,以1cm/秒的速度向D运动(不与D重合),设点P运动时间为t秒.
①请用t表示PD的长;②求t为何值时,四边形PBQD是菱形.
![](https://img.xkw.com/dksih/QBM/2019/7/27/2256041898926080/2257417060458496/STEM/c00a125f69ec456c9d3b16f3f39a0271.png?resizew=170)
(1)求证:四边形PBQD是平行四边形;
(2)若AD=8cm,AB=6cm,P从点A出发,以1cm/秒的速度向D运动(不与D重合),设点P运动时间为t秒.
①请用t表示PD的长;②求t为何值时,四边形PBQD是菱形.
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