在平面直角坐标系
中,已知线段
和直线
,
,线段
关于直线
,
的“垂点距离”定义如下:过点P作
于点M,过点Q作
于点N,连接
,称
的长为线段
关于直线
和
的“垂点距离”,记作d.
,
,则线段
关于x轴和y轴的“垂点距离”d为______;
(2)如图1,线段
在直线
上运动(点P的横坐标大于点Q的横坐标),若
,则线段
关于x轴和y轴的“垂点距离”d的最小值为______;
(3)如图2,已知点
,
的半径为1,直线
与
交于P,Q两点(点P的横坐标大于点Q的横坐标),直接写出线段
关于x轴和直线
的“垂点距离”d的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4be4cffbbaac28ccedee09c488de6b74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d1380e8a4ca803b0a1952ed837cabd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d9ac4c952b787d4483da71c0a2b8e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66077d3d3cbd20672a04ad25ba2ca82a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
(2)如图1,线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae652daf6059ff386f99bef2210518c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/187c4fdbdcafe2dd605005adecbb34dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(3)如图2,已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a78c5f0248258372f101f2b6f87abd88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf1b29bc6c418d91c0c34d0a663897fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c20d0b44025a639ce3a92d639dae587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f3b4416a186069ad6dbe9d9c1ed76e8.png)
2024·北京东城·一模 查看更多[1]
更新时间:2024-04-30 15:53:15
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相似题推荐
解答题-证明题
|
困难
(0.15)
【推荐1】如图,AB是⊙O的直径,点C在圆上,点N是
ABC的内心(角平分线的交点),CN的延长线交圆于点D,BN的延长线交圆于点F,EF
AC,EF交BC的延长线于点E.
(1)证明:EF与⊙O相切;
(2)若EF=2,EC=1.
①求⊙O的半径;
②求CN•ND的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
(1)证明:EF与⊙O相切;
(2)若EF=2,EC=1.
①求⊙O的半径;
②求CN•ND的值.
![](https://img.xkw.com/dksih/QBM/2021/8/22/2791484228886528/2794336268304384/STEM/f43b7812d20e4228bf8cf2a43fffb17b.png?resizew=158)
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【推荐2】如图,
是圆
的直径,
、
为圆上不同于
、
的两点,并且
、
位于直径
的两侧,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/a47e85a7-6455-46ff-b709-ebf909b26701.png?resizew=456)
(1)如图1,求证:
;
(2)如图2,
、
交于点
,过点
作
于点
,延长
交
于点
,求证:
;
(3)在(2)的条件下,若
,
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/a47e85a7-6455-46ff-b709-ebf909b26701.png?resizew=456)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bea3ec0f4c789df4e3e6582a43dde9d2.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b6cc3789c0e9b7d1226aa0de3327599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c57b07f75e97d9f84718bd495ebcf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e4183c75f18185441c0d6af2e29ddc7.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2ec9b70e01136a3ebbe0612d5ee303d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d5a8fddaedd9f15e26db1df377da4c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
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【推荐1】已知,直线
经过第一象限内的定点
.
(1)点
的坐标为_____________;
(2)如图1,已知点
,且
是关于
的方程
的两个实数根,直线
交直线
于点
;
①求证:
轴
②连接
,若
平分
,求
的值;
③如图2,点
是
轴上的一动点,连接
,以
为腰作等腰
(
、
、
按逆时针顺序排列),
,连接
,请直接写出
的最小值____________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0db730abd296b5ead68512b8d84cae1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)如图1,已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59789c807777093dfb8e7ca75cb26e97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e26f8d3b7dc01e040ff7acfe6ecb50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/21/fc413365-85e0-46db-b3d0-a395ddf84fc6.png?resizew=362)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d931bce6368ba976d026f1f0984ca3d0.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22f9341d51c827a29a4a0b0b3dded16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
③如图2,点
![](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/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c28abb154f41e1ca9816c9c9c2433ca.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/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cca6018f4191eccf938518698a41559c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84fb85c78522640bcaf889f89ad89de9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31a81aeacf308c410c5409e5ad8e2bfb.png)
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解答题-问答题
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【推荐2】如图,在扇形
中,
,
.
(1)求
的长度;
(2)已知P是
上的动点,过点P作
于点E,
于点F,点E,F分别在半径
,
上.
①求点P到AB的最大距离;
②连接
.若点H是
的外心,直接 写出在点P运动过程中点H运动的路径长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/575bf0ff60cb0afcb26a504a9078c028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ff5c21185c13eae675906dabd3593c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/12/de6f50ba-fa43-4c28-a6c2-8ed9e82e3fa0.png?resizew=184)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
(2)已知P是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b37625595a63cb47e1cdf9c5da40c3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/776e5e9395f9e5f656d3c2436f8ab4ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
①求点P到AB的最大距离;
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49969d5e2b17e6b2b8c651359941deb3.png)
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解答题-证明题
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困难
(0.15)
【推荐1】如图,在矩形
中,
,点E是
边上一点,连接
,过点E作
交
边于点F,连接
交
于点M.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/2/11c7bcaf-f8a9-407a-a4cf-16994f583bf8.png?resizew=365)
(1)当
时,求证:
;
(2)在(1)的条件下,计算
的值;
(3)当
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73ba94cec6c03980be9ca03774379fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/992a19339adac3a2f1aab1fbc11b1c68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/2/11c7bcaf-f8a9-407a-a4cf-16994f583bf8.png?resizew=365)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3636a141ab0dd2cc4c481c6d47cedfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d44e961846857b623388589fc518956e.png)
(2)在(1)的条件下,计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e856814d971e57a21a3cd6348360538.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876bb8ce0ca53475fa091ffd18bdc94a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
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名校
【推荐2】【教材回顾】
(1)苏科版教材八下第九章《中心对称图形—平行四边形》习题中有这样的问题:如图1,
的顶点 O在正方形
两条对角线的交点处,
, 将
绕点O旋转,
的两边分别与正方形
的边边
和
交于点
和点
(点
与点
,
不重合),问:在
旋转过程中,
与
具有怎样的数量关系?
爱思考的小歆和小涵同学分别探究出了如下两种解题思路:
小歆:考虑到正方形对角线的特征,过点O分别作
于点G,
于点H,即可通过证明三角形全等得到
与
的数量关系.
小涵:利用正方形对角线垂直、相等且互相平分等性质证明了三角形全等,可以得到
与
的数量关系.
通过他们的思路点拨,你认为
与
的数量关系为 ,并请选择一种思路去证明;
【类比探究】
(2) 如图2, 若将(1) 中的“正方形
”改为“
的菱形
”, 其他条件不变,当
时,判断以下结论正确的有 (填写所有正确的结论序号),并选择一个正确的结论去证明.
①
; ②
;
③四边形
的周长为定值; ④四边形
的面积为定值.
【拓展应用】
(3) 如图3, 学校内有一块四边形的花圃
, 满足
,
,
, 花圃内铺设了一条小路
,
平分
, 为方便学生赏花, 现计划修建一条径直的通道
与小路
相连,且
,入口点E恰好在
的延长线上.直接写出入口到点 A 的距离
的长 .
(1)苏科版教材八下第九章《中心对称图形—平行四边形》习题中有这样的问题:如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b2557547eecdc826b8282058802d217.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/319ff9f648fedec284a11a9761cb6183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b2557547eecdc826b8282058802d217.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b2557547eecdc826b8282058802d217.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/a0ed1ec316bc54c37c4286c208f55667.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/2b2557547eecdc826b8282058802d217.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
爱思考的小歆和小涵同学分别探究出了如下两种解题思路:
小歆:考虑到正方形对角线的特征,过点O分别作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbdaf6769ca790186718cc60c7b89ba6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27acaeba896dd1a4a221151ffa464848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
小涵:利用正方形对角线垂直、相等且互相平分等性质证明了三角形全等,可以得到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
通过他们的思路点拨,你认为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
【类比探究】
(2) 如图2, 若将(1) 中的“正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b0382c28547d3834ca71f3f0677695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd9b4bb7c5f4a856c3e0ca747fd64fb9.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf2e3236ea30ee2c37928b98041f13a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55cf8f5b487dfb9ede36eb5c711adb5b.png)
③四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e689223dbda856ab0898b0010ffb86a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0868623e3c43201d1dd029b38d53b2ad.png)
【拓展应用】
(3) 如图3, 学校内有一块四边形的花圃
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0425abc0a23299964ede59c6a0732743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b907d8eb3d3b70212e73e486398d89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10b3086ec8aa1fe23d09d63a941a74ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec9e2a600d4675d510c58b984027e33d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
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解答题-问答题
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名校
【推荐1】如图1,在平面直角坐标系中,抛物线
与x轴交于A,B两点(点A在点B左侧),与y轴交于点
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/23d25630-3d01-4188-aada-2313ef9d2df9.png?resizew=589)
(1)求这个抛物线的解析式;
(2)如图2,点P为线段
上方抛物线上一动点,过P点作线段
的垂线交
于点R,作x轴的平行线交
于点Q,当
的周长最大时,请求出
周长的最大值及点P的坐标;
(3)在(2)的条件下,将抛物线y沿射线
方向平移
个单位到新抛物线
,M为新抛物线
与原抛物线y的交点,N为原抛物线对称轴上一点,S为平面上任意一点,是否存在点S使得以点M,N,P,S为顶点的四边形为菱形?若存在,请直接写出满足条件的S点的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/345b67f9bd7bd80f8f52b1c7c55fb5f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/114460aab294eb99eec63e94b675216f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497e34cb645ed931bea31c5d4c558c94.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/23d25630-3d01-4188-aada-2313ef9d2df9.png?resizew=589)
(1)求这个抛物线的解析式;
(2)如图2,点P为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c28abb154f41e1ca9816c9c9c2433ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c28abb154f41e1ca9816c9c9c2433ca.png)
(3)在(2)的条件下,将抛物线y沿射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
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真题
【推荐2】如图,抛物线y=﹣x2+bx+c与x轴交于点A(﹣1,0),B(5,0)两点,直线y=﹣
x+3与y轴交于点C,与x轴交于点D.点P是x轴上方的抛物线上一动点,过点P作PF⊥x轴于点F,交直线CD于点E.设点P的横坐标为m.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/4/7a4299fa-d5c8-4c4b-997f-3bd2ceb82fd3.png?resizew=179)
(1)求抛物线的解析式;
(2)若PE=5EF,求m的值;
(3)若点E′是点E关于直线PC的对称点,是否存在点P,使点E′落在y轴上?若存在,请直接写出相应的点P的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/4/7a4299fa-d5c8-4c4b-997f-3bd2ceb82fd3.png?resizew=179)
(1)求抛物线的解析式;
(2)若PE=5EF,求m的值;
(3)若点E′是点E关于直线PC的对称点,是否存在点P,使点E′落在y轴上?若存在,请直接写出相应的点P的坐标;若不存在,请说明理由.
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