如图,已知抛物线
与x轴相交于点
和点B,与y轴交于点
顶点为D.
(2)判断
的形状,并说明理由;
(3)点P在抛物线上,点Q在直线
上,是否存在点P、Q使以点P、Q、C、O为顶点的四边形是平行四边形?若存在,求出点P的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8950c7bc835103d52ceffab14b6b31a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd81cac5d2bcf0753819951088027d1.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
(3)点P在抛物线上,点Q在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
更新时间:2019-07-11 13:26:22
|
相似题推荐
解答题-证明题
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【推荐1】如图,抛物线
与直线
交于
两点,交
轴与
两点,连接
已知
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/18/f08e1844-425d-47f3-a746-40643dd26d34.png?resizew=200)
(1)求抛物线的解析式;
(2)求证:
是直角三角形;
(3)
为
轴右侧抛物线上一动点,连接
,过点
作
交
轴于点
,问:是否存在点
使得以
为顶点的三角形与
相似?若存在,请求出所有符合条件的点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bac38c104f5ed9eb78722f3fa438453.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e434a6fc177990ab7f2b604c111e1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d240ea67c239b0d9213448c11cba18c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6d55845b39ec874c38d44768fffd193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2341528f7b6b8f88a894f5b91cc40b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/18/f08e1844-425d-47f3-a746-40643dd26d34.png?resizew=200)
(1)求抛物线的解析式;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)
![](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/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25881dcb62cd98876e561addb328f174.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/ad74f90f6e6893d41d31b52407869da9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b40c2b0ab8e1cfe5112d428b4b829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐2】(2017江苏省连云港市)如图,已知二次函数
(a≠0)的图象经过点A(3,0),B(4,1),且与y轴交于点C,连接AB、AC、BC.
(1)求此二次函数的关系式;
(2)判断△ABC的形状;若△ABC的外接圆记为⊙M,请直接写出圆心M的坐标;
(3)若将抛物线沿射线BA方向平移,平移后点A、B、C的对应点分别记为点A1、B1、C1,△A1B1C1的外接圆记为⊙M1,是否存在某个位置,使⊙M1经过原点?若存在,求出此时抛物线的关系式;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8de071a9c22c96a59b172d76c127e.png)
(1)求此二次函数的关系式;
(2)判断△ABC的形状;若△ABC的外接圆记为⊙M,请直接写出圆心M的坐标;
(3)若将抛物线沿射线BA方向平移,平移后点A、B、C的对应点分别记为点A1、B1、C1,△A1B1C1的外接圆记为⊙M1,是否存在某个位置,使⊙M1经过原点?若存在,求出此时抛物线的关系式;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2018/2/6/1876486203473920/1884864250314752/STEM/1ddceb71287f4de287d652fcb9318697.png?resizew=259)
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【推荐1】如图,抛物线y=
x2+bx-2与x轴交于A、B两点,与y轴交于C点,且A(一1,0).
⑴求抛物线的解析式及顶点D的坐标;
⑵判断△ABC的形状,证明你的结论;
⑶点M(m,0)是x轴上的一个动点,当CM+DM的值最小时,求m的值.
![](https://img.xkw.com/dksih/QBM/2011/8/8/1573236749115392/1573236799422464/STEM/6414a08b42a4481b9ffa9200c48f1b80.png?resizew=16)
⑴求抛物线的解析式及顶点D的坐标;
⑵判断△ABC的形状,证明你的结论;
⑶点M(m,0)是x轴上的一个动点,当CM+DM的值最小时,求m的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/29/b588a6b5-4b26-4e5f-9e1f-cd1d74df4c74.png?resizew=189)
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【推荐2】如图①,在菱形ABCD中,∠ABC=60°,P、Q是对角线BD上的两个动点,点P从点D出发沿BD方向以1cm/s的速度向点B运动,运动终点为B;点Q从点B出发沿着BD的方向以2cm/s的速度向点D运动,运动终点为D.两点同时出发,设运动时间为x(s),以A、Q、C、P为顶点的图形面积为y(cm2),y与x的函数图像如图②所示,根据图像回答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/d24fcdfb-11bb-4bf2-b5a0-ffef0187e80c.png?resizew=312)
(1)BD= ,a= ;
(2)当x为何值时,以A、Q、C、P为顶点的图形面积为4
cm2?
(3)在整个运动的过程中,若△AQP为直角三角形,请直接写出符合条件的所有x的值:.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/d24fcdfb-11bb-4bf2-b5a0-ffef0187e80c.png?resizew=312)
(1)BD= ,a= ;
(2)当x为何值时,以A、Q、C、P为顶点的图形面积为4
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(3)在整个运动的过程中,若△AQP为直角三角形,请直接写出符合条件的所有x的值:.
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【推荐1】如图,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
.
(1)求抛物线的表达式;
(2)
是第二象限内抛物线上的动点,设点
的横坐标为
,求四边形
面积S的最大值及此时D点的坐标;
(3)若点P在抛物线对称轴上,是否存在点P,使以点B,C,P为顶点的三角形是等腰三角形?若存在,请直接写出P点的坐标;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/7b00c9499415c5801c64a8177f4b35e6.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://img.xkw.com/dksih/QBM/editorImg/2023/11/5/79cd91dd-adf1-4627-b1af-0c264a69a176.png?resizew=287)
(1)求抛物线的表达式;
(2)
![](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://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)若点P在抛物线对称轴上,是否存在点P,使以点B,C,P为顶点的三角形是等腰三角形?若存在,请直接写出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
过点
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/1/52045fa3-5710-4d1b-a474-204c2bfb1032.png?resizew=202)
(1)求抛物线的解析式.
(2)在抛物线的对称轴上有一点
,使得
的周长最小,请求出点
的坐标.
(3)在
轴上是否存在点
,使
为等腰三角形?若存在,请求出所有符合条件的点
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/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c052d7af2f98d95bac8725b608fba0fc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/1/52045fa3-5710-4d1b-a474-204c2bfb1032.png?resizew=202)
(1)求抛物线的解析式.
(2)在抛物线的对称轴上有一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c40c49d6e2fc6fbdc21ff61841b586a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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【推荐1】如图,抛物线的对称轴是x=1,与x轴交于点A,B(3,0),与y轴交于点C(0,3).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/7/c909cfea-f976-45eb-a258-89f75dbd9afa.png?resizew=377)
(1)求抛物线的解析式;
(2)如图1,点
在抛物线的对称轴上,连接
,将线段
以点
为旋转中心顺时针旋转
,得到线段
,当点
落在抛物线上,求出此时点
的坐标;
(3)如图2,抛物线的对称轴与直线
相交于点
,于
轴交于点
,点
在直线
上,点
在抛物线上,是否存在以
,
,
,
为顶点的四边形为平行四边形,若存在请直接写出点
的坐标,若不存在请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/7/c909cfea-f976-45eb-a258-89f75dbd9afa.png?resizew=377)
(1)求抛物线的解析式;
(2)如图1,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)如图2,抛物线的对称轴与直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
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【推荐2】如图,抛物线
与x轴交于
,
两点,与
轴交于点
.
,
两点坐标;
(2)以
,
,
,
为顶点的四边形是平行四边形,求点
坐标;
(3)该抛物线对称轴上是否存在点
,使得
,若存在,求出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edf6f720224cbac84d2447ae3e491049.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ee80939187a84e1863eeb192a301c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)以
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)该抛物线对称轴上是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbeb8bdc95779c4ea641e1100361790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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