如图,抛物线
与x轴交于A(-1,0)、B(4,0)两点,与y轴交于点C,与过点C且平行于x轴的直线交于另一点D.
![](https://img.xkw.com/dksih/QBM/2015/5/27/1573844039835648/1573844046266368/STEM/f75149fe925f4ff99139c191157a36f5.png)
(1)求抛物线的解析式及点D的坐标.
(2)在抛物线上是否存在点P,使△CDP的面积为
,若存在,请求出点P的坐标;若不存在,请说明理由.
(3)点E是x轴上一点,在抛物线上是否存在点P,使以A,E,D,P为顶点的四边形是平行四边形,若存在,请直接写出点P的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2015/5/27/1573844039835648/1573844046266368/STEM/6c90f02b86f049f0874ab6d6cbb3c0cd.png)
![](https://img.xkw.com/dksih/QBM/2015/5/27/1573844039835648/1573844046266368/STEM/f75149fe925f4ff99139c191157a36f5.png)
(1)求抛物线的解析式及点D的坐标.
(2)在抛物线上是否存在点P,使△CDP的面积为
![](https://img.xkw.com/dksih/QBM/2015/5/27/1573844039835648/1573844046266368/STEM/3431f3b97db24ebaa2d0c02f4e2fdcb2.png)
(3)点E是x轴上一点,在抛物线上是否存在点P,使以A,E,D,P为顶点的四边形是平行四边形,若存在,请直接写出点P的坐标;若不存在,请说明理由.
更新时间:2016-12-06 00:16:49
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【推荐1】如图①,已知直线
与
轴交于点
,与
轴交于点
,抛物线
经过
,
两点,且与
轴的另一个交点为
,对称轴为直线
,
是第二象限内抛物线上的动点,设点
的横坐标为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/5f53ac1a-ebb5-4725-a0ad-bc2b0e93ec23.png?resizew=381)
(1)求抛物线的表达式;
(2)求四边形
面积
的最大值及此时
点的坐标;
(3)过点
向
轴作垂线(如图②),垂足为点
,是否存在点
,使
与
相似?若存在,请求出点
横坐标
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5f2c447bfe1f2118a7bd65be5c6727.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/5f53ac1a-ebb5-4725-a0ad-bc2b0e93ec23.png?resizew=381)
(1)求抛物线的表达式;
(2)求四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】如图,已知抛物线
与
轴交于点
和点
,与
轴交于点
,连接
,
,点
是抛物线第一象限上的一动点,过点
作
轴于点
,交
于点
.
![](https://img.xkw.com/dksih/QBM/2022/5/15/2979740461465600/2981948120752128/STEM/e0aa5e7fdf84494fa6dfa327fc6304fb.png?resizew=139)
![](https://img.xkw.com/dksih/QBM/2022/5/15/2979740461465600/2981948120752128/STEM/7060be63b85840ac8600fd3d19ba8900.png?resizew=138)
![](https://img.xkw.com/dksih/QBM/2022/5/15/2979740461465600/2981948120752128/STEM/df42cd10ce8a4c9a8a420ff602850756.png?resizew=135)
(1)求抛物线的函数表达式;
(2)如图1,作
于点
,使
,以
,
为邻边作矩形
.当矩形
的面积与
的面积相等时,求点
的坐标;
(3)如图2,当点
运动到抛物线的顶点时,点
在直线
上,若
为钝角,请直接写出点
纵坐标
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041f81a26abfcb8a540ee721dc13e3bf.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/b532b51e584020507d40c057c0527023.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76fc88ea5357b675c01e93c62fea338d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f00d0ff8dd38da17167cf9b789eec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2022/5/15/2979740461465600/2981948120752128/STEM/e0aa5e7fdf84494fa6dfa327fc6304fb.png?resizew=139)
![](https://img.xkw.com/dksih/QBM/2022/5/15/2979740461465600/2981948120752128/STEM/7060be63b85840ac8600fd3d19ba8900.png?resizew=138)
![](https://img.xkw.com/dksih/QBM/2022/5/15/2979740461465600/2981948120752128/STEM/df42cd10ce8a4c9a8a420ff602850756.png?resizew=135)
(1)求抛物线的函数表达式;
(2)如图1,作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f1d32bf674ab8605fb6246ba22b9ba9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44d8e68ae197fe875aadd97e383198a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e5d05a07b6df07004c43d9aaec4fef2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e5d05a07b6df07004c43d9aaec4fef2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1415e415ec7678b962af22b752faeea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)如图2,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65aa6b9cb7f13ed4577207129223295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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【推荐1】如图,抛物线y=﹣
x2+
x+2与x轴交于点A,B,与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/12/f90cae74-e7a6-43bc-8d90-d66b3a8310e9.png?resizew=184)
(1)试求A,B,C的坐标;
(2)将△ABC绕AB中点M旋转180°,得到△BAD.
①求点D的坐标;
②判断四边形ADBC的形状,并说明理由;
(3)在该抛物线对称轴上是否存在点P,使△BMP与△BAD相似?若存在,请直接写出所有满足条件的P点的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/12/f90cae74-e7a6-43bc-8d90-d66b3a8310e9.png?resizew=184)
(1)试求A,B,C的坐标;
(2)将△ABC绕AB中点M旋转180°,得到△BAD.
①求点D的坐标;
②判断四边形ADBC的形状,并说明理由;
(3)在该抛物线对称轴上是否存在点P,使△BMP与△BAD相似?若存在,请直接写出所有满足条件的P点的坐标;若不存在,请说明理由.
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【推荐2】如图,抛物线
与
轴交于
,
两点,顶点为
.
(2)若在线段
上存在一点
,使得
,过点
作
交
的延长线于点
,求点
的坐标;
(3)点
是
轴上一动点,点
是在对称轴上一动点,是否存在点
,
,使得以点
,
,
,
为顶点的四边形是菱形?若存在,求出点
的坐标,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090c4dd88844cf183b70eb04ed61ca5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d57173ef4cd72eb270686875dfd623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f36488f7dff759ace2a27e56c3857056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)若在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f949cc159aef1934ca2c6be23f07482.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4372700e7f8e5c755c8ad71671224b65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/acc290b44635265137fdf13146b6a6d9.png)
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【推荐3】如图,在平面直角坐标系中,直线
与
轴,
轴分别交于点A、B,抛物线
经过点A和点B,与x轴的另一个交点为C,动点D从点A出发,以每秒1个单位长度的速度向O点运动,同时动点E从点B出发,以每秒2个单位长度的速度向A点运动,设运动的时间为t秒,0<t<5.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/8cb28f50-f760-46ce-bbdc-125edf0cb83d.png?resizew=210)
(1)求抛物线的解析式;
(2)当t为何值时,以A、D、E为顶点的三角形与△AOB相似;
(3)当△ADE为等腰三角形时,求t的值;
(4)抛物线上是否存在一点F,使得以A、B、D、F为顶点的四边形是平行四边形?若存在,直接写出F点的坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06bb80c6d18691920bb7c174f04940f2.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/782ef7ad720c5f1031968eb4ebf1f618.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/8cb28f50-f760-46ce-bbdc-125edf0cb83d.png?resizew=210)
(1)求抛物线的解析式;
(2)当t为何值时,以A、D、E为顶点的三角形与△AOB相似;
(3)当△ADE为等腰三角形时,求t的值;
(4)抛物线上是否存在一点F,使得以A、B、D、F为顶点的四边形是平行四边形?若存在,直接写出F点的坐标;若不存在,说明理由.
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