如图,抛物线
与x轴交于点
与y轴交于点C,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/6/aebded31-a1f4-4fb8-b666-ac1d6d0290c1.png?resizew=249)
(2)点D是直线
上方的抛物线上一点,连接
交
于点E,当时
,求点D的坐标;
(3)点P在抛物线的对称轴上,在坐标平面内是否存在点Q,使得以P,Q,B,C为顶点的四边形是矩形?若存在,请直接写出点Q的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86f94568a5d4e4865c5e9de9995c3a69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d1f0a38571c5acbcad40b8f63ff3aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/6/aebded31-a1f4-4fb8-b666-ac1d6d0290c1.png?resizew=249)
备用图
(1)求该抛物线的解析式;(2)点D是直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e968263cadc5253b39909d4283c52826.png)
(3)点P在抛物线的对称轴上,在坐标平面内是否存在点Q,使得以P,Q,B,C为顶点的四边形是矩形?若存在,请直接写出点Q的坐标;若不存在,请说明理由.
更新时间:2024-04-06 16:44:52
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相似题推荐
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【推荐1】如图,抛物线
与x轴交于A,
两点(点A在点B的左侧),与y轴交于点
.
(2)已知
是直线
下方抛物线上的一个动点(不与点A,C重合),连接
在点D运动的过程中:
①求n的取值范围;
②若
,请直接写出m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/958f036044338429cfde2215c9a850ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e9ab82047f838a5c1a0a90b37a6c38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26b0a29d42184a922dfa809f5ef597ca.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d72342d36b9668a02e01104bd7580d3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002bb554d785baac1b941e17eec46f19.png)
①求n的取值范围;
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43d981d2e60add69252df09cfa5038ae.png)
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【推荐2】如图,在平面直角坐标系中,一次函数
与反比例函数
的图象交于点
,且过点
.
![](https://img.xkw.com/dksih/QBM/2021/7/8/2759898854809600/2790130347499520/STEM/5d1f0c5e-98bc-4691-bb6c-f2b2dff327aa.png)
(1)求反比例函数和一次函数的表达式;
(2)如果点
是
轴上一点,且
的面积是3,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/081ba22efad814e20357967381bc1ead.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96ef7e9efc2681546f2320b108a1987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25ce8d4a9d432afe03a988ae2d49c28c.png)
![](https://img.xkw.com/dksih/QBM/2021/7/8/2759898854809600/2790130347499520/STEM/5d1f0c5e-98bc-4691-bb6c-f2b2dff327aa.png)
(1)求反比例函数和一次函数的表达式;
(2)如果点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐1】如图,已知抛物线
的图像经过点
,
,
经过点B,且与抛物线交于点D.
(1)求抛物线的解析式;
(2)点
是二次函数图像上一点
点
在
上方
,过
作
轴,垂足为
,交
于点
,设
点坐标为
.
①直接写出线段
的表达式
用含
的代数式表示
;
②当
的面积最大的时候,求
的值及面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b71acf35bb0952c2abba601707d000c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa3305ac6ef7117a61b3ed9fffb03030.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55d12701014cf53071093e8739d089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15206717884bea18dfe2d7099489f849.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/bd8535fc-a168-46dd-90d0-e1f026a5fb01.png?resizew=198)
(1)求抛物线的解析式;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0522607eeb42a499c0f5b040bbdd42e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cf75310b48015af5b03e8b4ea7a16ed.png)
①直接写出线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa29fe6cd9eb51c184f6299d437375cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9830cb9f3785e2b262b99bf831ced636.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐2】如图,已知抛物线
与直线
交于A,
两点,求:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/20/e430d4ad-f784-410d-befe-ce57fd263033.png?resizew=141)
(1)c,b的值.
(2)写出不等式
的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d51fe2c3360092d941ffd20814836c34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd4818433c179082330a071c5a376d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55d12701014cf53071093e8739d089b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/20/e430d4ad-f784-410d-befe-ce57fd263033.png?resizew=141)
(1)c,b的值.
(2)写出不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9349d00eeac6537e2ba35ee18bc9d063.png)
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【推荐1】已知,如图抛物线
与
轴交于点
,与
轴交于
,
两点,点
在点
左侧.点
的坐标为
,
.
(2)点
是抛物线对称轴
上的一个动点,当
的值最小时,求点
的坐标.
(3)若点
是线段
下方抛物线上的动点,求四边形
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7540afce792c6a96f404c974d5bfc35c.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/81dea63b8ce3e51adf66cf7b9982a248.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a948d2f7732d7f03e986c63712089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05581788393270ca7057397c95a7ef7b.png)
(2)点
![](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/2e211e1a1b43adc52e401350b26c9a16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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【推荐2】已知抛物线
(
为常数),抛物线与
轴交于点
,点
,与
轴交于点
,顶点为
.
(1)当
时,求该抛物线的顶点坐标;
(2)若点
是抛物线在第一象限内的点,有一点
,当
时,求
的值;
(3)在(1)的条件下,连接
,点
是第一象限内的抛物线上的一动点,过点
作
于点
,连接
,当
最大时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9a475fec8ded321e10a6697319fb975.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/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/8455657dde27aabe6adb7b188e031c11.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8774b931c2e35bfc5c1c93492619e14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b73fefcc182cde91d6478a8a166eb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1044a0f7af65b233ace6222438983ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(3)在(1)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cfc3ce4519e2fc5e1825faf4c741c34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8db072e2b6104671b82f948012fb45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
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解题方法
【推荐1】如图,已知抛物线
与
轴交于点
,点
,与
轴交于点
,顶点为点
.
![](https://img.xkw.com/dksih/QBM/2022/2/19/2919980542230528/2923361083539456/STEM/7d364a0715ce4cea80eefc85c5ac8cea.png?resizew=250)
(1)求抛物线的解析式;
(2)若过点
的直线交线段
于点
,且
,求
的正切值;
(3)若点
在抛物线上,点
在
轴上,当以点
、
、
、
为顶点的四边形是平行四边形时,直接写出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311497849126f1aaf1da0ec75602eabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d03fa28c117649b0fdfe17eed7b583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62855ff21228ecea8e28fd0fbeb814ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2022/2/19/2919980542230528/2923361083539456/STEM/7d364a0715ce4cea80eefc85c5ac8cea.png?resizew=250)
(1)求抛物线的解析式;
(2)若过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eefd18c5034dc3a843e48a8ca6113e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b1de710e447bb71a01ad70d2354958.png)
(3)若点
![](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/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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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名校
【推荐2】在平面直角坐标系中,抛物线
与
轴交于
、
两点(点
在
点的左侧).
(1)求点
、
的坐标;
(2)点
为抛物线
的对称轴
上一点,抛物线
关于
轴对称的抛物线为
,在抛物线
上是否存在点
,使得以
、
、
、
为顶点的四边形为菱形,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/e389e2eba59463cce9abff4f48ae1f66.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172722d11ea7e01411fa06dbb82f46ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172722d11ea7e01411fa06dbb82f46ee.png)
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