如图,在平面直角坐标系中,抛物线
过点
,且交
轴于点
,
两点,交
轴于点
.
(2)点
是直线
上方抛物线上的一动点,过点
作
于点
,过点
作
轴的平行线交直线
于点
:
①当点P运动到抛物线顶点时,求此时
的面积;
②点
在运动的过程中,是否存在
周长的最大值,若存在,请求出
周长的最大值及此时点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8de071a9c22c96a59b172d76c127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be3ad3dd6803d92df6ff8a80cd35095.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)点
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c65334978b0519b379910dfc4acf8344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
①当点P运动到抛物线顶点时,求此时
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cff7399ecc698e2fb415147c96d0d03.png)
②点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cff7399ecc698e2fb415147c96d0d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cff7399ecc698e2fb415147c96d0d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
更新时间:2024-03-31 11:24:39
|
相似题推荐
解答题-问答题
|
困难
(0.15)
名校
【推荐1】二次函数
的图象经过点
,
,点A关于抛物线对称轴的对称点为点C,点P是抛物线对称轴右侧图象上的一点,点
.
(1)求出点C坐标及抛物线的解析式;
(2)若以A,C,P,G为顶点的四边形面积等于30时,求点P的坐标;
(3)若Q为线段
上一动点,过点Q平行于y轴的直线与过点G平行于x轴的直线交于点M,将
沿
翻折得到
,当点N在坐标轴上时,求Q点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3666050060fb25232784bb8ed3545ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1b4315630139326aff4ffc04c765d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ce7be37ff9418a9c95d5dc54814ebd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95cd976c4c2f3e9dba551443883eca47.png)
(1)求出点C坐标及抛物线的解析式;
(2)若以A,C,P,G为顶点的四边形面积等于30时,求点P的坐标;
(3)若Q为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77689e821bfd20de1d21459caf6962ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55bb0405afa96ebf94c5b03fd52763dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e1f358445d9f36f2be6cb0912dede7c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/43e06b9a-44a8-41d3-ac9e-40fe1dfa7926.png?resizew=420)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
【推荐2】我们不妨约定:在平面直角坐标系中,如果函数图象上至少存在一个点的纵坐标是横坐标的3倍,则把该函数称之为“开心函数”,其图象上纵坐标是横坐标3倍的点叫做“开心点”.
(1)判断以下函数上是否是“开心函数”,若是,则打√,若不是,则打“×”;
①
________ ②
________ ③
________
(2)关于x的函数
(a为常数)是“开心函数”吗?如果是,指出有多少个“开心点”,如果不是,请说明理由;
(3)若抛物线
(a、b、c为常数),与x轴分别交于
,
两点,其中
;与y轴交于C点
,抛物线顶点为P点,点M为第三象限抛物线上一动点,且点M的横坐标为t,连接
,
交于N点,连接
,
,记
,
,若满足:①抛物线顶点P为“开心点”;②
;③
是等边三角形;若
,
的最大值为
,求m的值.
(1)判断以下函数上是否是“开心函数”,若是,则打√,若不是,则打“×”;
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec205dd821e251510f265bd53cf62526.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ccbf79da6ad7e3709d6fa72efb756.png)
(2)关于x的函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2803cf7f115732b5f322400527f35a49.png)
(3)若抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ec3d75e53b990bc8f9a4622928dd21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b583230a32b774445332490c511989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5c0b4bf88663b0463f282a9550c1afb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc4bc8171e9f6181e0c97da4e66063d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0e300ca861c6d342e1a1a9606da00b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365d218f0abd54e1184983e0fe4367c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8f47fdee541404f16f58227cdada3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b51579217eeb0f62fd201d9aef88be.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐1】如图,在平面直角坐标系中,抛物线
与
轴交于点
,
,与
轴交于点
,连接
,
.
(2)
为直线
上方抛物线上一点,过点
作
于点
,过点
作
轴交抛物线于点
,求
的最大值及此时点
的坐标;
(3)点
关于抛物线对称轴对称的点为
,将抛物线沿射线
方向平移
个单位长度得到新抛物线
,新抛物线
与
轴交于点
,新抛物线
的对称轴与
轴交于点
,连接
,
,点
在直线
上,连接
.当
与
一边平行时,直接写出点
的坐标,并写出其中一种符合条件的解答过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcb9c08eb57b46d156bdd2a3f7f7e3b6.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/56c53a3db1c5e56df936174633faae92.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c65334978b0519b379910dfc4acf8344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd26a79182e530bd89cb3587ae8c85f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e4c0dfdd303bf7889d67107c3af310d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d7b816eca15d4b7d060013df53edd53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d7b816eca15d4b7d060013df53edd53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
真题
名校
【推荐2】如图,抛物线
经过点
,
,与y轴正半轴交于点C,且
.抛物线的顶点为D,对称轴交x轴于点E.直线
经过B,C两点.
的函数表达式;
(2)点F是抛物线对称轴上一点,当
的值最小时,求出点F的坐标及
的最小值;
(3)连接
,若点P是抛物线上对称轴右侧一点,点Q是直线
上一点,试探究是否存在以点E为直角顶点的
,且满足
.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/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913f78382630e50543e5f7192cae3ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ba5cbb31299d683ac6c7dd795db85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84acb42778406c1a60d818f6ca760366.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89c1972246a0a3d1c987d25205dbdd99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)点F是抛物线对称轴上一点,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8140901e0070e30c37f0df68b8b7e2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8140901e0070e30c37f0df68b8b7e2a.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83e2234253f8e31c56745aad22a575e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a2ceacca189e0aa2ac6774ef503ed67.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐1】在平面直角坐标中,点
为坐标原点,直线
与
轴交于点
,与
轴交于点
,点
在直线
上,且点
横坐标为6,抛物线
经过点
和点
.
(1)求
和
的值;
(2)如图1,点
是直线
上方抛物线上一点(点
不与点
、点
重合),过点
作
轴交
于点
,若
,求
点坐标;
(3)如图2,在(2)的条件下,延长
交
轴于点
,连接
,延长
交
轴于点
,点
是
上一点,连接
,点
是第一象限抛物线上的一点,连接
与
相交于点
,连接
,若
,
,求直线
的解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0bbd45a300cd506c9d2bbf8f6ac3498.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/c5db41a1f31d6baee7c69990811edb9f.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/f18269e4b2c08f69b719c4c7e7d71733.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/17/f50c4f76-fcd3-4380-9917-061d1cf58113.png?resizew=660)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)如图1,点
![](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/8455657dde27aabe6adb7b188e031c11.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/7d2522a6e2f5f434d684cfedea6690e1.png)
![](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/604f76136cc701ad002c437b0207c0a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)如图2,在(2)的条件下,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.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/30dba1743f66d3c35dd995bae5c50f10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65eb7c4f5d73f24e20df95e9654f1d67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](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/bc9cb923965ba2c8d91addc240d58ea6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79c7c2dfe801505e5c9b6b48c662e31d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/330538dc603a7f476edd97880f46a069.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
真题
名校
【推荐2】已知抛物线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
,
为常数,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e4cc00c283519973f7f8e1274b5c733.png)
的顶点为
,与
轴相交于
,
两点
点
在点
的左侧
,与
轴相交于点
,抛物线上的点
的横坐标为
,且
,过点
作
,垂足为
.
(1)若
.
①求点
和点
的坐标;
②当
时,求点
的坐标;
(2)若点
的坐标为
,且
,当
时,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54d36b66f70e28199120f7ac784ba13f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e4cc00c283519973f7f8e1274b5c733.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.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/987517758fad59f6f695761deb2a5ebd.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7dfff9ab01050b9a3e19e78a33db34a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66fae8e33cd86fa8dab72704eaafe1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea80370a8e2c36d69b10d0782e970cb7.png)
①求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/056c2272e0d10d6dd9706e6324d8e62d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe592db9ab31d7f0eab4a9e438fa63e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7fd1d52eb8a0bd8a8c9cff72887a62e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bfa3899a3ab6d8263e2931dfba410ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐1】如图,已知二次函数的图象与x轴交于
和
两点,与y轴交于点
,直线
经过点A,且与y轴交于点D,与抛物线交于点E.
(2)如图1,点M在
下方的抛物线上运动,求
的面积最大值;
(3)如图2,在y轴上是否存在点P,使得以D、E、P为顶点的三角形与
相似,若存在,求出点P的坐标;若不存在,试说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8748dc55e2f45bc37fc4d84d7310f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8314b1fdf7dcef270ac0a2567609242.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae140e4db2c5563e5f902fcbebaac262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/463742c5f9c442d712f183d7430f4134.png)
(2)如图1,点M在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e323c08b18488d11bd8f3cd74efa971a.png)
(3)如图2,在y轴上是否存在点P,使得以D、E、P为顶点的三角形与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/372629a8666de1e9bac3e7daadcac7b6.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐2】如图,在平面直角坐标系中,抛物线
与
轴交于点
、
,与
轴正半轴交于点
,
,在直线
上方的抛物线上有一动点
.
![](https://img.xkw.com/dksih/QBM/2022/2/22/2921953274077184/2927020469272576/STEM/c173d365-5cca-4062-91f4-d1678ab1c8d9.png?resizew=154)
(1)求抛物线的解析式;
(2)连接
,与直线
相交于点
,当
时,求点
的坐标;
(3)连接
、
、
,四边形
的面积是否存在最大值?若存在,求出此时点
的坐标和四边形
的面积;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ba23d524dc2a51f2a2f5a2eec842f22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/84acb42778406c1a60d818f6ca760366.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2022/2/22/2921953274077184/2927020469272576/STEM/c173d365-5cca-4062-91f4-d1678ab1c8d9.png?resizew=154)
(1)求抛物线的解析式;
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f97e75d014fe7c5a86a92f9160539a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46085ca435d9e3582a8962fb0f60ba86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46085ca435d9e3582a8962fb0f60ba86.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐3】抛物线y=ax2+c的顶点为C(0,1),与直线y=kx+3(k为常数)相交于A(x1,y1),B(x2,y2)两点.当k=0时,点B的横坐标恰好为2(如图1).
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923424480198656/2927416130977792/STEM/99f920234c6243c4b662c3f86589b978.png?resizew=483)
(1)求a、c的值;
(2)当k=0时,若点P是抛物线上异于A、C的一点,且满足2PC2=AB2+2AP2,试判断△PAC的形状,并说明理由;
(3)若直线y=﹣1交y轴于点F,过点A、B分别作该直线的垂线,垂足分别为D、E,连接AF、BF(如图2).设△ADF、△ABF、△BEF的面积分别为S1、S2、S3,是否存在常数t,使S22=t•S1S3?若存在,求出t的值;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923424480198656/2927416130977792/STEM/99f920234c6243c4b662c3f86589b978.png?resizew=483)
(1)求a、c的值;
(2)当k=0时,若点P是抛物线上异于A、C的一点,且满足2PC2=AB2+2AP2,试判断△PAC的形状,并说明理由;
(3)若直线y=﹣1交y轴于点F,过点A、B分别作该直线的垂线,垂足分别为D、E,连接AF、BF(如图2).设△ADF、△ABF、△BEF的面积分别为S1、S2、S3,是否存在常数t,使S22=t•S1S3?若存在,求出t的值;若不存在,请说明理由.
您最近一年使用:0次