如图,在
中,
,
,点O是
的中点,动点P从点A出发,沿折线
运动,到达点C停止运动,设点P运动的路程为x,
的面积为y,请解答下列问题:
(2)在平面直角坐标系中画出y与x的函数图像,并写出它的一条性质:___________________________________;
(3)若直线
与该函数图像有且只有2个交点,则k的取值范围为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73ba94cec6c03980be9ca03774379fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd66776565f049eb453c14fcaf79234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b4dcc093218443f71a046b6df94bbe.png)
(2)在平面直角坐标系中画出y与x的函数图像,并写出它的一条性质:___________________________________;
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02ebce8b2a915356ed39f36c5bad2ebe.png)
2023·重庆九龙坡·二模 查看更多[6]
2023年重庆市育才中学教育集团中考二模数学试题(已下线)专题23 动态几何+函数图像(30道)-学易金卷:5年(2019-2023)中考1年模拟数学真题分项汇编(重庆专用)(已下线)2023年重庆二模(函数性质探究综合)重庆市九龙坡区2023-2024学年九年级上学期素质测试数学试题四川省成都市金牛区铁路中学校2023-2024学年九年级上学期期中数学测试题2023年重庆市中考考前数学模拟预测题
更新时间:2023-05-20 18:01:13
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【推荐1】如图,在矩形ABCD中,AB=6cm,AD=2cm,点P以2cm/s的速度从顶点A出发沿折线A→B→C向点C运动,同时点Q以1cm/s的速度从顶点C出发沿边CD向点D运动.当其中一个动点到达末端停止运动时,另一点也停止运动.
(1)两动点运动几秒,使四边形PBCQ的面积是矩形ABCD面积的
?
(2)是否存在某一时刻,点P与点Q之间的距离为
cm?若存在,直接写出运动所需的时间为 ;若不存在,请说明理由.
(3)直接写出PQ长度的最小值 .
(1)两动点运动几秒,使四边形PBCQ的面积是矩形ABCD面积的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d86ab7c97cd8a0b15ba5efc1be94230.png)
(2)是否存在某一时刻,点P与点Q之间的距离为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
(3)直接写出PQ长度的最小值 .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/d9c5907e-c6d1-416c-8524-f3ee3bebc522.png?resizew=97)
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解题方法
【推荐2】如图①,在长方形ABCD中,AB=10cm,BC=8cm,点P从A出发,沿A→B→C→D路线运动,到D停止;点P出发时的速度为每秒1cm,a秒时点P的速度变为每秒bcm,图②是点P出发x秒后,△APD的面积S(cm2)与x(s)的函数关系图像.
(1)根据题目中提供的信息,求出图②中a,b,c的值;
(2)设点P运动的路程为y(cm).
①7s时,y的值为 cm;
②请写出当点P改变速度后,y与x的函数关系式;
(3)当点P出发后几秒时,△APD的面积S是长方形ABCD面积的
?
(1)根据题目中提供的信息,求出图②中a,b,c的值;
(2)设点P运动的路程为y(cm).
①7s时,y的值为 cm;
②请写出当点P改变速度后,y与x的函数关系式;
(3)当点P出发后几秒时,△APD的面积S是长方形ABCD面积的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/29/d078ffd7-b1e9-4b0c-a3a8-62d662c100e9.png?resizew=325)
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【推荐1】如图,长方形
在平面直角坐标系
的第一象限内,点
在
轴正半轴上,点
在
轴的正半轴上,点
、
分别是
、
的中点,
,点
的坐标为
.
![](https://img.xkw.com/dksih/QBM/2019/11/13/2333005254041600/2333045130141696/STEM/a0fed2d53ae544c288d8ba1d459d0c1e.png?resizew=146)
(1)求
的值及直线
的表达式;
(2)现将长方形
沿
折叠,使顶点
落在平面内的点
处,过点
作
轴的平行线分别交
轴和
于点
,
.
①求
的坐标;
②若点
为直线
上一动点,连接
,当
为等腰三角形,求点
的坐标.
【说明:在直角三角形中,如果一个锐角等于
,那么它所对的直角边等于斜边的一半】
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0af13586681abc06d8b41fab349294ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5029587c26acdd3b6d1b000614f53785.png)
![](https://img.xkw.com/dksih/QBM/2019/11/13/2333005254041600/2333045130141696/STEM/a0fed2d53ae544c288d8ba1d459d0c1e.png?resizew=146)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(2)现将长方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3557809c066e68395b614535a7675e76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3557809c066e68395b614535a7675e76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3557809c066e68395b614535a7675e76.png)
②若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f3e6a741721d1852bf5f302f5aec0a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec15558046cb904cd8c21c4d36e1adc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
【说明:在直角三角形中,如果一个锐角等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
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【推荐2】如图,已知直线
经过点
,交
轴于点
,
轴于点
,
为线段
的中点,动点
从原点出发,以每秒1个位长度的速度沿
轴正方向运动,连接
,过点
作直线FC的垂线交
轴于点
,设点
的运动时间为
秒.
(1)当
时,求证:
;
(2)连接CD,若
的面积为
,求出
与
的函数关系式;
(3)在运动过程中,直线CF交
轴的负半轴于点
,
是否为定值?若是,请求出这个定值;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b191419668f5db82a99531ae8333c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a7e88b74f492f89e21e4cf65353bdb6.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/103a1045-9c7b-40b6-96fd-72f381d2fe69.png?resizew=698)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0fed6f944ef4b07f7e33ca893581fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f58b5b04ac80d064d9e3e1a484b3beef.png)
(2)连接CD,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c7b7be09862e90dd0065ec7b712e024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a454a2c91ace8ef50412a6adf91f8086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a454a2c91ace8ef50412a6adf91f8086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)在运动过程中,直线CF交
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f33cd7621fbf3d13a71b831757d462.png)
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【推荐1】如图,在平面直角坐标系中,直线
分别与x轴,y轴相交于点A,点B,直线
与
相交于点
,与x轴相交于点
,与y轴相交于点E,点P是y轴上一动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/22/e96cafa5-5ed0-4952-bb5d-80eb8ecb2ede.jpg?resizew=189)
(1)求直线
的表达式:
(2)
的面积为 ;
(3)连接
,
,
①当
的面积等于
面积的一半时,请直接写出点P的坐标为 ;
②当
时,请直接写出点P的坐标为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc9118cc77fc0a045337745890e50cad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2cf2be5f9a47917b33b00ca889a8b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23ee8669bc280bff4b20644cb82faf23.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/22/e96cafa5-5ed0-4952-bb5d-80eb8ecb2ede.jpg?resizew=189)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96645a3530e72d5d733d2c72147d340.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b3198348693ae0a21041701269306e4.png)
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【推荐2】如图,在平面直角坐标系中,A(0,4)、B(6,0)为坐标轴上的点,点C为线段AB的中点,过点C作DC⊥x轴,垂足为D,点E为y轴负半轴上一点,连结CE交x轴于点F,且CF=FE.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/8a07fd9c-cdb3-4869-a363-d276f02b36c7.png?resizew=473)
(1)直接写出E点的坐标;
(2)过点B作BG∥CE,交y轴于点G,交直线CD于点H,求四边形ECBG的面积;
(3)直线CD上是否存在点Q使得∠ABQ=45°,若存在,请求出点Q的坐标,若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/8a07fd9c-cdb3-4869-a363-d276f02b36c7.png?resizew=473)
(1)直接写出E点的坐标;
(2)过点B作BG∥CE,交y轴于点G,交直线CD于点H,求四边形ECBG的面积;
(3)直线CD上是否存在点Q使得∠ABQ=45°,若存在,请求出点Q的坐标,若不存在,请说明理由.
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【推荐1】如图,在
中,
,
,
,动点P从点A出发沿
以
速度向终点D运动,同时点Q从点C出发,以
速度沿射线
运动,当点P到达终点时,点Q也随之停止运动,设点P运动的时间为t秒(
).
的长为______;
(2)用含
的代数式表示线段
的长;
(3)连接
,
①是否存在t的值,使得
与
互相平分?若存在,求出t的值;若不存在,请说明理由;
②是否存在
的值,使得
与
互相平分?若存在,求出t的值;若不存在,请说明理由;
(4)若点P关于直线
对称的点恰好落在直线
上,请直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad4ab29c466d4d8ca14eda2850e11247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc2d9b900111188aca83126dff97f32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/098473c52bb15cbc6e58d6f5b235db7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
(2)用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf702adb116c1e46569eb7050d029f49.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
①是否存在t的值,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
②是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(4)若点P关于直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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解答题-证明题
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较难
(0.4)
【推荐2】已知:如图①,AD为⊙O的直径,点A为优弧
的中点,延长BO交AC于点E.
![](https://img.xkw.com/dksih/QBM/2022/1/24/2901404095913984/2901507259105280/STEM/a0e252c5-e28d-485c-9b44-35813d2e484c.png?resizew=442)
(1)求证:∠BAC=2∠ABE;
(2)若△BCE是等腰三角形时,求∠BCE的度数;
(3)如图②,若弦BC垂直平分半径OD,连接DE交BC于点F,DF=a,EF=k•DF,S△BEF=1,M、N、P分别为直线BD、BF、DF上的三个动点,求△MNP周长的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
![](https://img.xkw.com/dksih/QBM/2022/1/24/2901404095913984/2901507259105280/STEM/a0e252c5-e28d-485c-9b44-35813d2e484c.png?resizew=442)
(1)求证:∠BAC=2∠ABE;
(2)若△BCE是等腰三角形时,求∠BCE的度数;
(3)如图②,若弦BC垂直平分半径OD,连接DE交BC于点F,DF=a,EF=k•DF,S△BEF=1,M、N、P分别为直线BD、BF、DF上的三个动点,求△MNP周长的最小值.
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