在平面直角坐标系中,点
为坐标原点,抛物线
(
、
是常数)经过点
、
,点
在该抛物线上.
(1)求该抛物线对应的函数表达式并写出顶点的坐标.
(2)当点
关于
轴的对称点在直线
上时,求
的值.
(3)过点
作
轴于点
,当
时,在线段
上取点
,点
坐标为
,当
的周长最小时,求这个最小值以及点
的坐标.
(4)点
也在该抛物线上,当抛物线在
两点之间部分(含
、
两点)对应的函数最大值与最小值差为
时,直接写出所有满足条件的
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a6d861cf80bd971be02918cfa58cb76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29610a3415c1e795d35979a5a9ff69f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a1b2bf0143b4710a39f2d40a7a5f89d.png)
(1)求该抛物线对应的函数表达式并写出顶点的坐标.
(2)当点
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2784a52c4da98dc9df661fc152fc29e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c8951e515ff33eb8292e769d146885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/7160d93f92089ef36f3dab809d3114b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0023c9e8e0fec24d3aa77d09b2e4e62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(4)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1054c6c4844d88bc51cfa339ce37cb39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/902f97913e1af1e6c793f7edfe6b2114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8a26872412717e953a6d97fa94b4ffb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2024-05-06 00:43:12
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相似题推荐
解答题-计算题
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困难
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【推荐1】定义:对于一次函数
(k,m是常数,
)和二次函数
(a,b,c是常数,
),如果
,
,那么一次函数
叫做二次函数
的牵引函数,二次函数
叫做一次函数
的原函数.
(1)若二次函数
(a是常数,
的图象与其牵引函数的图象有且只有一个交点,求a的值;
(2)已知一次函数
是二次函数
的牵引函数,在二次函数
上存在两点
,
.若
也是该二次函数图象上的点,记二次函数图象在点A,M之间的部分为图象G(包括M,A两点),记图象G上任意一点纵坐标的最大值与最小值的差为t,且
,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b256345d7109e081b7c895591e995d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c80c26a794a844127aae7dee87c93b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a61d5a6683aef555abb1338df682e0c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa4a2c40a0e34fe669870586307155c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b256345d7109e081b7c895591e995d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b256345d7109e081b7c895591e995d.png)
(1)若二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9e6d34ba445a8f51687a0176268a5b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
(2)已知一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5df0c300246d6b3d6b8fa9f0ebbe923c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f81fffe2e537eb176f7d02402924f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f81fffe2e537eb176f7d02402924f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ae8145585f54463abe2d8c001db226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47b5ebdf14bd72d1693ebb5fca0411f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b0e3fb585cbb815cd39f7e83970976.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8da720915cbad5dbf1bd96b0d45680.png)
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【推荐2】如图1,抛物线y=2ax2﹣5ax﹣3a与x交于A、B两点(A在B左侧),与y轴交于点C,且3OC=2OB.
(1)求抛物线的解析式;
(2)如图2,连接BC,在线段BC上有一动点P,过P作y轴的平行线l1,交抛物线于点N,交x轴于点M,若以C、P、N为顶点的三角形与△BPM相似时,求P点的横坐标;
(3)如图3,T(t,0)为x轴上一动点,过T作y轴的平行线l2,Q为x轴上方抛物线上任意一点,直线AQ、BQ分别交l2于点E、F,则当t为何值时,TE+TF为定值,并求出该定值.
(1)求抛物线的解析式;
(2)如图2,连接BC,在线段BC上有一动点P,过P作y轴的平行线l1,交抛物线于点N,交x轴于点M,若以C、P、N为顶点的三角形与△BPM相似时,求P点的横坐标;
(3)如图3,T(t,0)为x轴上一动点,过T作y轴的平行线l2,Q为x轴上方抛物线上任意一点,直线AQ、BQ分别交l2于点E、F,则当t为何值时,TE+TF为定值,并求出该定值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/29/f0a53d2d-e419-4377-8d4f-6f1a2c3a8ad9.png?resizew=555)
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【推荐1】如图1,已知抛物线
交x轴于A,B两点,交y轴于C,若
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/416066d0-96d9-43d2-8caa-9330934a3533.png?resizew=672)
(1)求抛物线的解析式;
(2)如图2,抛物线的对称轴交x轴于Q,P为第一象限对称轴右侧抛物线上一点,连接
、
,将线段
绕点B顺时针旋转
得到线段
,将线段
绕点A逆时针旋转
得到线段
,连接
交抛物线对称轴于点M,求M点坐标;
(3)如图3,在(2)的条件下,点G是x轴下方对称轴上一点,在抛物线对称轴右侧作矩形
,使得
,连接
并延长交第三象限抛物线于H,T为
上一点,连接
,
交
于N,若
,
,求点H的横坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40d398e31d27052f0b689bb30706faac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/416066d0-96d9-43d2-8caa-9330934a3533.png?resizew=672)
(1)求抛物线的解析式;
(2)如图2,抛物线的对称轴交x轴于Q,P为第一象限对称轴右侧抛物线上一点,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(3)如图3,在(2)的条件下,点G是x轴下方对称轴上一点,在抛物线对称轴右侧作矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b51140e1a05f5050ce05793d4e0d753b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8355361f4d30dc7a0a65d2dba3af391.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632917e61f4208959686d118c7f19231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5bdbbd3084ddc946e12d530d2192522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa40a126b76e8cd700d653eaefd2b93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b6fb0185d4a13fae9d8dab8b4e18a68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67c015d99f2677951bdcd0447240ef93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f42036d151a4ab2d13d2cc135da5873a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/782ff8f47b3774944ada1584c5f6f455.png)
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【推荐2】平面直角坐标系中,点O是坐标原点,抛物线
经过点
,对称轴为直线
.
(1)求
、
的值;
(2)抛物线与
轴交于B、C两点(C在B的右侧),点D是抛物线的顶点.
(ⅰ)点E是抛物线上一动点,且位于直线
的上方,过点E作
的垂线交
于点F,求
长度的最大值;
(ii)在直线
上是否存在点G,使得
? 若存在,请求出点G的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1394a4ed26d099cb02fb97ccb635f0f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)抛物线与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(ⅰ)点E是抛物线上一动点,且位于直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(ii)在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1acc47f443e7ac8cfa925395ac414302.png)
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【推荐3】如图1,抛物线C1:y=ax2+bx﹣2与直线l:y=﹣
x﹣
交于x轴上的一点A,和另一点B(3,n)
![](https://img.xkw.com/dksih/QBM/2022/2/18/2918897612431360/2918965196619776/STEM/84039a558b91451f8b58b3e6e13a4400.png?resizew=455)
(1)求抛物线C1的解析式;
(2)点P是抛物线C1上的一个动点(点P在A,B两点之间,但不包括A,B两点)PM⊥AB于点M,PN∥y轴交AB于点N,求MN的最大值;
(3)如图2,将抛物线C1绕顶点旋转180°后,再作适当平移得到抛物线C2,已知抛物线C2的顶点E在第一象限的抛物线C1上,且抛物线C2与抛物线C1交于点D,过点D作DF∥x轴交抛物线C2于点F,过点E作EG∥x轴交抛物线C1于点G,是否存在这样的抛物线C2,使得四边形DFEG为菱形?若存在,请求E点的横坐标;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/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/2022/2/18/2918897612431360/2918965196619776/STEM/84039a558b91451f8b58b3e6e13a4400.png?resizew=455)
(1)求抛物线C1的解析式;
(2)点P是抛物线C1上的一个动点(点P在A,B两点之间,但不包括A,B两点)PM⊥AB于点M,PN∥y轴交AB于点N,求MN的最大值;
(3)如图2,将抛物线C1绕顶点旋转180°后,再作适当平移得到抛物线C2,已知抛物线C2的顶点E在第一象限的抛物线C1上,且抛物线C2与抛物线C1交于点D,过点D作DF∥x轴交抛物线C2于点F,过点E作EG∥x轴交抛物线C1于点G,是否存在这样的抛物线C2,使得四边形DFEG为菱形?若存在,请求E点的横坐标;若不存在,请说明理由.
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【推荐1】如图,二次函数
的图象交x轴于
、
两点,交y轴于点C,连接
.
(1)求二次函数的解析式;
(2)如图1,点E是直线
下方抛物线上的一动点,过点E作
轴交
于点G,作
于点F,求
周长的最大值及此时点E的坐标;
(3)如图2,动点P以每秒1个单位长度的速度从A向B运动,动点Q以每秒
个单位长度的速度从B向C运动,P、Q同时出发,连接
,当点Q到达C点时,P、Q同时停止运动,设运动时间为t秒.当
时,延长
交y轴于点M,在抛物线上是否存在一点N,使得
的中点恰为
的中点?若存在,求出点N的坐标与t的值;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/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/22/a6b5b812-79bf-406e-b8a7-a9f1c57d75e4.png?resizew=314)
(1)求二次函数的解析式;
(2)如图1,点E是直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb84cdbf19fbffb5c5b836827ebb4874.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc90fee532e50d319081d571410421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e5e61804ce550636a0354e0a78a22d.png)
(3)如图2,动点P以每秒1个单位长度的速度从A向B运动,动点Q以每秒
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1961f45e9de6198a9d5807a004de92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f6927cc2a930203ac34366383e76ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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解题方法
【推荐2】附加题:在平面直角坐标系中,抛物线
与
轴交于点
,点
关于
轴的对称点为点
,
(1)求抛物线的对称轴;
(2)求点
坐标(用含
的式子表示);
(3)已知点
,
,若抛物线与线段
恰有一个公共点,结合函数图像,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cc4d9bcf16842bdf17a51d8d8d84554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)求抛物线的对称轴;
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52b3dfa86ff02c9612ee0c16fbdea8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e01e7ca03e2e7687d50c05cded9a90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-问答题
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困难
(0.15)
【推荐1】在平面直角坐标系中,点O为坐标原点,抛物线
经过点
,点
.
(1)求b,c的值:
(2)如图1,点F在
上(点F不与点O、点B重合),线段
的垂直平分线与射线
相交于点P,设点P的横坐标为t,线段
的长d,求d与t的函数关系式(不要求写出自变量t的取值范围);
(3)如图2,在(2)的条件下,点C在
上,连接PC,过点F作
,垂足为D,将线段
绕点F逆时针旋转
得到线段
,点E落在抛物线上,连接
并延长交
于的M,连接
并延长交
于点H,若
,求直线
的解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69b97a5463054ebb319ab426ee81ba8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad724c85af13f05bbd794121bec7ef37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05f91d3dae606eb82b05160c222766ba.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/29/1f72f6aa-a8f7-4624-856b-42058057f5cd.png?resizew=378)
(1)求b,c的值:
(2)如图1,点F在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
(3)如图2,在(2)的条件下,点C在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d4c4796313dc41e460dfa713e196a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c57b07f75e97d9f84718bd495ebcf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e88d73d930cf3de473781c499aa416b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
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解答题-问答题
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困难
(0.15)
【推荐2】已知抛物线
与x轴相交于A,B两点 (点A在点B的左侧),与y轴相交于点C,过抛物线的顶点 D作
轴于点M,点 N在y轴正半轴上,
,点P在抛物线上,过点P作x轴垂线,交x轴于点E,交直线MN于点 F.
(1)若
;
①求抛物线顶点D和点A的坐标;
②若点P在第一象限,过点P作
垂直直线
于点H,
,求点E的坐标;
(2)若
,点P与点C关于抛物线的对称轴对称,射线
交直线
于点 G, 当
时,求顶点D的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef2570f0ef3f24b7d661b9a8bcc4a806.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4914b846a985658a528ab9d70ccc7c30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42ae0780499990e8897f021eafa71221.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76e8866b7126dadf6d2d46225fcdb891.png)
①求抛物线顶点D和点A的坐标;
②若点P在第一象限,过点P作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d58f9019097bd05037aefd5c322916.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037ddc68a73d24ab692f1b7f9fb31337.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5362f8f16a77bd574409494a7bc49d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3072a2f3a5e1b341754ab08d6e51b2b6.png)
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