名校
1 . 如图,抛物线
与x轴交于A、B两点,与y轴交于点C,
,点B的坐标为
,顶点为D,对称轴与x轴交于点E,则下列结论:①
,②
,③
,④当
时,在线段DE上一定存在点P,使得△ABP为等腰直角三角形,其中正确的结论的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/18/b9d06303-c48c-4984-9da9-f64150bba4c3.png?resizew=171)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497e34cb645ed931bea31c5d4c558c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bccb0ba99f869615f32e4320ee7810d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57824da76d23e3c2628921c3cff4ca21.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/18/b9d06303-c48c-4984-9da9-f64150bba4c3.png?resizew=171)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
名校
2 . 如图1,在平面直角坐标系中,抛物线
与x轴交于点A(3,0)、B(-1,0)两点,与y轴交于点C,连接AC.
![](https://img.xkw.com/dksih/QBM/2022/5/22/2984753896153088/2988489167478784/STEM/d5700688-a335-4e18-bf8d-033abfaa7784.png?resizew=439)
(1)求抛物线的解析式;
(2)点P为线段AC上方抛物线上一动点,过点P作
轴交AC于点Q,求
的最大值及此时点P的坐标;
(3)如图2,将抛物线沿射线CA方向平移
个单位,得到新抛物线
,M是新抛物线
的对称轴上一点,在(2)问的条件下,若
是以AP为腰的等腰三角形,请直接写出符合条件的所有点M的坐标,并把求其中一个点M的坐标的过程写出来.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db73441fa9f52910506cc4426fc56df1.png)
![](https://img.xkw.com/dksih/QBM/2022/5/22/2984753896153088/2988489167478784/STEM/d5700688-a335-4e18-bf8d-033abfaa7784.png?resizew=439)
(1)求抛物线的解析式;
(2)点P为线段AC上方抛物线上一动点,过点P作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2784a52c4da98dc9df661fc152fc29e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ae8318ba25de0ac446857334b869e4c.png)
(3)如图2,将抛物线沿射线CA方向平移
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc627e8a6320ed55914c49e867c5fc32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/784b26de6134b6d3f5a81e2882a7d7f8.png)
您最近一年使用:0次
3 . 如图,在平面直角坐标系中,抛物线
与
轴交于
,
,与
轴交于点
.
![](https://img.xkw.com/dksih/QBM/2022/5/15/2979858675736576/2988480589185024/STEM/6c6f0c8b66f64877aa3914d46bc9c3ac.png?resizew=382)
(1)求抛物线的解析式;
(2)如图,
为直线
上方的抛物线
上任意一点,
,垂足为
,求线段
长的最大值.
(3)将抛物线
沿射线
平移,
,
的对应点分别为
,
,当以点
,
,
为顶点的三角形是以
为腰的等腰三角形时,请直接写出点
的坐标,并任选其中一个点的坐标,写出求解过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c6bc57fa426449aa2b226fbaed7a05e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ba5cbb31299d683ac6c7dd795db85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2022/5/15/2979858675736576/2988480589185024/STEM/6c6f0c8b66f64877aa3914d46bc9c3ac.png?resizew=382)
(1)求抛物线的解析式;
(2)如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c6bc57fa426449aa2b226fbaed7a05e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bef7eab528a8dd3e3f328de3b3ac80ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d58f9019097bd05037aefd5c322916.png)
(3)将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c1a89c495be618bca7c4e6af85ba8ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
名校
4 .
在平面直角坐标系中的位置如图所示,
与
轴交于点
,点
的坐标为
,线段
,
的长分别是方程
的两根,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/19/8be130c5-0d67-4881-b46b-5184746de811.png?resizew=254)
(1)求线段
的长;
(2)动点
从点
出发,以每秒1个单位长度的速度沿
轴负半轴向终点
运动,过点
作直线
与
轴垂直,设点
运动的时间为
秒,直线
扫过四边形
的面积为
,求
与
的关系式;
(3)
为直线
上一点,在平面内是否存在点
,使以
,
,
,
为顶点的四边形为正方形?若存在,请直接写出点N的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fcf82d01c39fd2c96e1edba0ad37dd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a7e88b74f492f89e21e4cf65353bdb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/841efb8acc17c0c921e888aed94ff19e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d707c621dfb4e9e5c371e730689fcf4b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/19/8be130c5-0d67-4881-b46b-5184746de811.png?resizew=254)
(1)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f7c674f87a67fde99afceb3cfd8189.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
您最近一年使用:0次
2022-05-18更新
|
246次组卷
|
4卷引用:重庆市铜梁区巴川中学2022-2023学年九年级上学期入学数学试题
重庆市铜梁区巴川中学2022-2023学年九年级上学期入学数学试题2022年黑龙江省佳木斯市前进区九年级第二次模拟考试数学试题(已下线)专题21.14 一元二次方程根与系数关系(知识讲解)-2022-2023学年九年级数学上册基础知识专项讲练(人教版)(已下线)专题2.14 一元二次方程根与系数关系(知识讲解)-2022-2023学年九年级数学上册基础知识专项讲练(北师大版)
5 . 如图1,抛物线
经过点
,顶点为C.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/4e30935e-044c-4fd8-ac73-72045e044048.png?resizew=408)
(1)求抛物线的表达式;
(2)抛物线上是否存在一点M,使以
为底边的
为等腰三角形.若存在,请求出点M的坐标;若不存在,请说明理由;
(3)P为线段
上任意一点,N为x轴上一动点,连接
,以点N为中心,将
逆时针旋转
,记点P的对应点为H,点B的对应点为Q.当直线
经过点
时,直接写出它与抛物线
交点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/442834866daf52da017a459b05d8031b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8576e0f1d544c41bb19f8a9540b6015d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/4e30935e-044c-4fd8-ac73-72045e044048.png?resizew=408)
(1)求抛物线的表达式;
(2)抛物线上是否存在一点M,使以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad3e2b2689dfe97ec82d473ab6cf469.png)
(3)P为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ffc7d1af9053b027cf9e726f5367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35fe4d4160c1b1c9bdb52cf72b451b0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c018b37259f3ead2ab2d94bd744f44d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/623afc24f2227004b0e1b3922dfb954b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/442834866daf52da017a459b05d8031b.png)
您最近一年使用:0次
6 . 如图1,抛物线
经过点
,
,顶点为C.
![](https://img.xkw.com/dksih/QBM/2022/4/23/2964198639271936/2966654134910976/STEM/52734618-455d-4ce5-a7d4-3450901c77ae.png?resizew=445)
(1)求抛物线的表达式;
(2)抛物线上是否存在一点Q,使△QBC为以BC为底的等腰三角形.若存在,请求出点Q的坐标;若不存在,请说明理由;
(3)P为线段BC上任意一点,M为x轴上一动点,连接MP,以点M为中心,将△MPB逆时针旋转90°,记点P的对应点为E,点B的对应点为F.当直线EF经过点
时,直接写出它与抛物线
交点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f18269e4b2c08f69b719c4c7e7d71733.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd5ea3ab3a6090acd2eced2eba160fbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dc3c08eef999400cd015513dcbe18fc.png)
![](https://img.xkw.com/dksih/QBM/2022/4/23/2964198639271936/2966654134910976/STEM/52734618-455d-4ce5-a7d4-3450901c77ae.png?resizew=445)
(1)求抛物线的表达式;
(2)抛物线上是否存在一点Q,使△QBC为以BC为底的等腰三角形.若存在,请求出点Q的坐标;若不存在,请说明理由;
(3)P为线段BC上任意一点,M为x轴上一动点,连接MP,以点M为中心,将△MPB逆时针旋转90°,记点P的对应点为E,点B的对应点为F.当直线EF经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3f93441d3b3533a33854538243e8b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f18269e4b2c08f69b719c4c7e7d71733.png)
您最近一年使用:0次
名校
解题方法
7 . 在平面直角坐标系中,抛物线y
x2
x+3与x轴交于A、B两点(A在B左侧),与y轴交于点C,抛物线的顶点为D,过点B作BC的垂线,交对称轴于E.
![](https://img.xkw.com/dksih/QBM/2022/3/27/2945516053667840/2946480759898112/STEM/7869e8821af5492fb14e88aa515e08ca.png?resizew=458)
(1)如图1,点P为第一象限内的抛物线上一动点,当△PAE面积最大时,在对称轴上找一点M,在y轴上找一点N,使得OM+MN+NP最小,求此时点M的坐标及OM+MN+NP的最小值;
(2)如图2,平移抛物线,使抛物线的顶点D在射线AD上移动,点D平移后的对应点为D',点A的对应点A',设原抛物线的对称轴与x轴交于点F,将△FBC沿BC翻折,使点F落在点F′处,在平面上找一点G,使得以A'、D'、F'、G为顶点的四边形为菱形.直接写出D′的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a162dc68b1f6889351e5727b6d2d014e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe62ba5fb342eb97254f63b765d4520.png)
![](https://img.xkw.com/dksih/QBM/2022/3/27/2945516053667840/2946480759898112/STEM/7869e8821af5492fb14e88aa515e08ca.png?resizew=458)
(1)如图1,点P为第一象限内的抛物线上一动点,当△PAE面积最大时,在对称轴上找一点M,在y轴上找一点N,使得OM+MN+NP最小,求此时点M的坐标及OM+MN+NP的最小值;
(2)如图2,平移抛物线,使抛物线的顶点D在射线AD上移动,点D平移后的对应点为D',点A的对应点A',设原抛物线的对称轴与x轴交于点F,将△FBC沿BC翻折,使点F落在点F′处,在平面上找一点G,使得以A'、D'、F'、G为顶点的四边形为菱形.直接写出D′的坐标.
您最近一年使用:0次
2022·重庆·模拟预测
8 . 如图,在平面直角坐标系中,抛物线
的图像开口向上,对称轴为直线
,与x轴交于A、B两点,其中B点的坐标为(
,0),与y轴交于点C,且OB=OC,连接AC.
![](https://img.xkw.com/dksih/QBM/2022/3/14/2943026749349888/2943740283764736/STEM/a365ca53-8c6a-4fcf-9df6-5e0071786a66.png?resizew=542)
(1)求该抛物线的解析式;
(2)如图1,P为直线AC下方抛物线上一点,过点P作PE⊥x轴交直线AC于点E,过点A作AF⊥AC交直线PE于点F,若
,求点P的坐标;
(3)如图2,点D是抛物线y的顶点,将抛物线y沿着射线AC平移得到
,
为抛物线
的顶点,过
作
⊥x轴于点M.在平移过程中,是否存在以D、
、M为顶点的三角形是等腰三角形?若存在,直接写出
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3ba0e94d4b9c1ed39b8a7e3c439b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://img.xkw.com/dksih/QBM/2022/3/14/2943026749349888/2943740283764736/STEM/a365ca53-8c6a-4fcf-9df6-5e0071786a66.png?resizew=542)
(1)求该抛物线的解析式;
(2)如图1,P为直线AC下方抛物线上一点,过点P作PE⊥x轴交直线AC于点E,过点A作AF⊥AC交直线PE于点F,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/382bcce0a0e8f79cf5ee4ce3f5961876.png)
(3)如图2,点D是抛物线y的顶点,将抛物线y沿着射线AC平移得到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b977da2be0fc44742bd313eea1c30997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aebbfe5e1e3a23269101ae0e9b05a3fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
您最近一年使用:0次
名校
9 . 如图,在平面直角坐标系中,抛物线
与x轴交于点
,
,与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/2022/3/11/2933896355700736/2937670129467392/STEM/b51fc71f-3bd3-49d8-bd4d-b095121cc8cb.png?resizew=435)
(1)求该抛物线的解析式;
(2)如图1,点D与点C关于抛物线的对称轴对称,连接BD交y轴于点G,作直线OD,点P为线段BD上方的抛物线上任意一点,过点P作
轴交BD于点E,过点P作
直线OD于点F.当
为最大时,求这个最大值及此时点P的坐标;
(3)如图2,连接BC、BD,将
绕点O顺时针旋转
得到
,使得
,将线段
沿射线
平移得到
,连接
,
,请问在平移过程中,是否存在
是以
为直角边的直角三角形,若存在,请直接写出
的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ceba6b11658f2cc227b1f550ba25c3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc0d82cb174d173b7e36937c3f99f591.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ba5cbb31299d683ac6c7dd795db85.png)
![](https://img.xkw.com/dksih/QBM/2022/3/11/2933896355700736/2937670129467392/STEM/b51fc71f-3bd3-49d8-bd4d-b095121cc8cb.png?resizew=435)
(1)求该抛物线的解析式;
(2)如图1,点D与点C关于抛物线的对称轴对称,连接BD交y轴于点G,作直线OD,点P为线段BD上方的抛物线上任意一点,过点P作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d7f1cf1911c8cd96e6dca4275b2443c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce49710609f7bffc36441dc5c2f7c2ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1e81c29626587c2e356a14ae57128e6.png)
(3)如图2,连接BC、BD,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4807ca16360c0cca436e59d4be98f626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb1aa7bc4a01962fc1297f17fa9128f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac73b92f00d9940e8549abbadc96c0bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2c2d6c09740ac2a734d0170a32708ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94765b7a91142b509b33df21798b0d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/386a60ca751f26f8c5108f0c277c37b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6a5babf7378364731ee9edfcf5ac49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20b95af1e66dbdb9c0a9c440607f0e0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff330cd427a9c0d57f1d36166ec161ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ddf407442f7a0bff1caa08b1675a43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd0aa8efcd0bd157c3dbe33e191cad17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/188005909403a033587e784c3d68f3a8.png)
您最近一年使用:0次
2022九年级·全国·专题练习
名校
10 . 如图,抛物线y=ax2+bx+4交x轴于点A(﹣1,0)、B(4,0),交y轴于点C,点P是直线BC上方抛物线上的一点.
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923424499965952/2927555873136640/STEM/427150a36306486faa857498ec911251.png?resizew=427)
(1)求抛物线的解析式;
(2)求△PBC的面积的最大值以及此时点P的坐标;
(3)在(2)的条件下,将直线BC向右平移
个单位得到直线l,直线l交对称轴右侧的抛物线于点Q,连接PQ,点R为直线BC上的一动点,请问在平面直角坐标系内是否存在一点T,使得四边形PQTR为菱形,若存在,请直接写出点T的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923424499965952/2927555873136640/STEM/427150a36306486faa857498ec911251.png?resizew=427)
(1)求抛物线的解析式;
(2)求△PBC的面积的最大值以及此时点P的坐标;
(3)在(2)的条件下,将直线BC向右平移
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d297eab7380f6a28ec010218d9ab4ba1.png)
您最近一年使用:0次