如图1,在平面直角坐标系
中,直线
与
轴交于点
,直线
与
轴交于点
,与
相交于
点,过
轴上动点
作直线
轴分别与直线
、
交于
、
两点.
(1)①请直接写出点
,点
,点
的坐标:
______,
______,
______.
②若
,求
的值;
(2)如图2,若
为线段
上动点,过点
作直线
交直线
于点
,求当
为何值时,
最大,并求这个最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7795aec93c2c7ac2fd93e6747ca6516c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbb51096f4d54ad3cc2aa72a26151904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/901ff35c8f354b3b107307f729f295ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d54a59ba55d5e12ae8b643e60a1bb49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4e3e144dcd38926906a9fad1a2b6826.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/11/f80afa08-caee-4357-8cc5-98ba7be9d3b1.png?resizew=345)
(1)①请直接写出点
![](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
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d14c6959273338a048b023805cce80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f7a7d15fb95d3d66279a3b792333cc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b270c61e2e967d030562585abd0bf10.png)
更新时间:2023-09-18 14:56:19
|
【知识点】 几何问题(一次函数的实际应用)解读
相似题推荐
【推荐1】如图,已知平面直角坐标系中,A(1,0),C(0,2),现将线段CA绕A点顺时针旋转90°得到点B,连接AB.
(1)求出直线BC的解析式;
(2)若动点M从点B出发,沿线段BC以每秒
个单位的速度运动,过点M作MN∥AB交y轴于N,连接AN.设运动时间为t秒,当四边形ABMN为平行四边形时,求t的值;
(3)P为直线BC上一点,若在坐标平面内存在点Q,使得四边形OBPQ为菱形,请直接写出点Q的坐标.
![](https://img.xkw.com/dksih/QBM/2021/7/26/2772771380600832/2773870002102272/STEM/53f59ba7-e423-47c8-99a5-8a20f3296562.png?resizew=329)
(1)求出直线BC的解析式;
(2)若动点M从点B出发,沿线段BC以每秒
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4056761b8f826eeb6ad8c9a151d3c9c.png)
(3)P为直线BC上一点,若在坐标平面内存在点Q,使得四边形OBPQ为菱形,请直接写出点Q的坐标.
![](https://img.xkw.com/dksih/QBM/2021/7/26/2772771380600832/2773870002102272/STEM/53f59ba7-e423-47c8-99a5-8a20f3296562.png?resizew=329)
![](https://img.xkw.com/dksih/QBM/2021/7/26/2772771380600832/2773870002102272/STEM/b2dbdfad-fa5a-4b98-9224-9737bab4bbf2.png?resizew=330)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】已知,如图在平面直角坐标系中,直线y=﹣
x+4交x轴于点C,交y轴于点B,直线y=kx+4经过点B,交x轴于点A,且AC=BC.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/8/8b93483d-933a-4570-8b17-75dc00b9276d.png?resizew=667)
(1)求k的值;
(2)以BC为边在第一象限内作等腰直角
BCD,∠BCD=90°,BC=CD,动点P从点O出发以每秒1个单位的速度沿x轴向右运动,连接PD,设P点运动的时间为t,
PCD的面积为S,请用含t的式子表示S,并直接写出t的取值范围;
(3)在(2)的条件下,在点P运动过程中,当
PCD为等腰三角形时,求P点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d599cb4a589f90b0205f24c2e1fa021e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/8/8b93483d-933a-4570-8b17-75dc00b9276d.png?resizew=667)
(1)求k的值;
(2)以BC为边在第一象限内作等腰直角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(3)在(2)的条件下,在点P运动过程中,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
您最近一年使用:0次