在平面直角坐标系中,O为原点,
是等腰直角三角形,
,顶点
,点B在第一象限,矩形
的顶点
,点C在y轴的正半轴上,点D在第二象限,射线
经过点B.
(Ⅱ)将矩形
沿x轴向右平移,得到矩形
,点O,C,D,E的对应点分别为
,
,
,
,设
,矩形
与
重叠部分的面积为S.
①如图②,当点
在x轴正半轴上,且矩形
与
重叠部分为四边形时,
与
相交于点F,试用含有t的式子表示S,并直接写出t的取值范围;
②当
时,求S的取值范围(直接写出结果即可).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e724c94d9af209ad04910f7a5f8f0a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e95e84f5c91c910aaafc5e74dbfbdf59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f87d89b3eb0c40885f5a6f011d9171b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3a7af4397cfcbac814d570debc76287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
(Ⅱ)将矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f87d89b3eb0c40885f5a6f011d9171b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b983d15e2265ea1fbe2e1b041b1865a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b1a5427d8ff23df0f3ec194756c84c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ec5b34559d44ba345133399644b485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b983d15e2265ea1fbe2e1b041b1865a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
①如图②,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b1a5427d8ff23df0f3ec194756c84c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b983d15e2265ea1fbe2e1b041b1865a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cece895cbddf9d1f37f75e3b6346edda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9478cdf0bafee0265a0087a17eff670.png)
2021·天津·中考真题 查看更多[7]
天津市2021年中考数学真题(已下线)2021年天津市中考真题数学变式汇编52022年吉林省四平市双辽市中考二模数学试题浙江省义乌市稠州中学2022-2023学年上学期九年级开学测试数学试题(已下线)黄金卷03-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷(云南专用)(已下线)22.3 实际问题与二次函数(习题)-2022-2023学年九年级数学上册同步精讲精练(人教版)江苏省苏州市苏州工业园区苏州工业园区星港学校2023-2024学年九年级下学期3月月考数学试题
更新时间:2021-06-21 14:37:46
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解答题-问答题
|
困难
(0.15)
名校
【推荐1】如图①,在正方形
中,点
以
的速度从点
出发按箭头方向运动,到达点
停止.
的面积![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
与运动时间![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
之间的函数图像如图②所示.(规定:点
在点
,
时,
)
发现:(1)
= _______
,当
时,
=_________
;
(2)当点
在线段_________上运动时,
的值保持不变.
拓展:求当
及
时,
与
之间的函数关系式.
探究:当
为多少时,
的值为
?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b17e347256dae15ba6258c8177a7b9.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/c6e2903ff33266528a7902ad51cf8d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/334615e89bc26552c949dbcc9d687f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c915ae0688700f8a275d195afdda6cee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/e2a7df955fc17e92fd86302f8c34664a.png)
发现:(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97153bc3d02dfb38ee046487a8037a41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0b49d586e381d72a591858887cca78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85ccdc7aaa645c8bcc8978cda5479821.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
拓展:求当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/688fc294e74f86d9a7663c23efaad23a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18e17f1d073ea707c90b876c391e3bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
探究:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b184c94e38f1e5dbe750b2168c2a37.png)
![](https://img.xkw.com/dksih/QBM/2017/5/2/1678455855996928/1685356096159744/STEM/8446ebc5e8b04f7ca1630a0eab9d7a94.png?resizew=489)
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解答题-问答题
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(0.15)
【推荐2】如图所示,动点
、
同时从原点
出发,运动的速度都是每秒1个单位,动点
沿
轴正方向运动,动点
沿
轴正方向运动,以
、
为邻边建立正方形
,抛物线
经过
、
两点,假设
、
两点运动的时间为
秒:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/3892b536-28c3-4c4c-aeb4-59de9773c01f.png?resizew=462)
(1)直接写出直线
的解析式;
(2)当
秒时,求此时抛物线的解析式;此时抛物线上是否存在一点
,使得
?若存在,求出点
的坐标;若不存在,说明理由;
(3)在(2)的条件下,有一条平行于
轴的动直线
,交抛物线于点
,交直线
于点
,若以
、
、
、
四个点构成的四边形是平行四边形,求点
的坐标;
(4)在动点
、
运动的过程中,若正方形
内部有一个点
,且满足
,
,
,直接写出此时
的长度.
![](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/1dde8112e8eb968fd042418dd632759e.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ea16ceca816f7d3d50650af141baf42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/3892b536-28c3-4c4c-aeb4-59de9773c01f.png?resizew=462)
(1)直接写出直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66884efff7400f92b530d69d029778d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa997d69264a6382e76ef7c8e339eff6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)在(2)的条件下,有一条平行于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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)
(4)在动点
![](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/3ea16ceca816f7d3d50650af141baf42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70fa2c1e50403dd1cdd969d6308692eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b60f7441172407b19e9e61b85a0170d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6401930b3e7eb739b290cf8b361540c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐3】如图所示,在平面直角坐标系xOy中,Rt△AOB的直角边OB,OA分别在x轴上和y轴上,其中OA=2,OB=4,现将Rt△AOB绕着直角顶点O按逆时针方向旋转90°得到△COD,已知一抛物线经过C、D、B三点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/20/43ea90ee-ff27-456d-a979-92d0ec7e0585.png?resizew=519)
(1)该抛物线的解析式为 ;
(2)设点E是抛物线上位于第一象限的动点,过点E作EF⊥x轴于点F,并交直线AB于N,过点E再作EM⊥AB于点M,求△EMN周长的最大值;
(3)当△EMN的周长最大时,在直线EF上是否存在点Q,使得△QCD是以CD为直角边的直角三角形?若存在请求出点Q的坐标,若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/20/43ea90ee-ff27-456d-a979-92d0ec7e0585.png?resizew=519)
(1)该抛物线的解析式为 ;
(2)设点E是抛物线上位于第一象限的动点,过点E作EF⊥x轴于点F,并交直线AB于N,过点E再作EM⊥AB于点M,求△EMN周长的最大值;
(3)当△EMN的周长最大时,在直线EF上是否存在点Q,使得△QCD是以CD为直角边的直角三角形?若存在请求出点Q的坐标,若不存在,请说明理由.
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐1】【问题提出】
分别在四边形
的边
上,连接
,若
,
,试判断
与
之间的数量关系,并说明理由;
【问题探究】
(2)如图2,在矩形
中,
,
,点
为
的中点,点
分别为线段
上的动点(点
均不与端点重合),且
,连接
,过点
作
于点
,连接
,求
长度的最小值;
【问题解决】
(3)某地在文旅开发建设中规划设计五边形
为当地文旅形象展示区(计划分为传统区和创新区两个区域),如图3,在边
上分别取点
(点
均不与端点重合),将四边形
修建为传统区,五边形
修建为创新区,在
上取点
,并沿
摆放一排花盆,沿
铺设一条观赏通道,根据规划要求,
,
,
米,
米,
米,
,
.在实际铺设中,为了节约铺设成本,要求
的长度尽可能小,当
的长度最小时,求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba48366317ebea1c9dd5e4e67e03092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ee81b6066188abee9d167b6c7f3f71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c51937f8af0136b4ce7ad1e2a37071fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
【问题探究】
(2)如图2,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4630b9ca3d20635161fa8fbf812b9128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e790c8b6bab0071aaaa7964f9ac71d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7650d1f1700ffbd767744ed51757208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd27b64b553f69d1f8f550b9d5b093c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
【问题解决】
(3)某地在文旅开发建设中规划设计五边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e44ef83b454761f82cfda06bc86fae06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c741cf8348e9fa4ee6894ac2c3ac6dad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c741cf8348e9fa4ee6894ac2c3ac6dad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ddcd5435b39971f897210aa0b66a259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b89dea16976470ff96b1cf062deb2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c48d4cf1da89bca1ddd4ba99bf4ea3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05cc271a0ce558c63e6e8d5d6d5d28ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af0e847821c95966efc534f26fbe4f6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b3311018b2bd20a28b0c3aaa060a7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53e3cd4566cc35d715806d5fca506db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d63fd012c1a7170bb8989691f54153ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f3644c0a187424c8d9254c4c22a97c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
【推荐2】已知
中,
,
,直角
的顶点
为斜边
上的一个动点,直角的两边分别交线段
、
于
、
两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/24/fbe67075-f3f9-47a5-bd41-8127509a5c74.png?resizew=361)
(1)如图1,当
,且
时,求
的长度;
(2)如图2,当
时,求证:
;
(3)如图3,在(2)的条件下,将直角
绕点
旋转,点
是
的中点,连接
,过一点
作
,垂足为
,交
于
;当线段
最短时,求三角形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08313da7b66283d2e0b3987f3e6761f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfa70e7c9ef8b856b494d370b7d76482.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/24/fbe67075-f3f9-47a5-bd41-8127509a5c74.png?resizew=361)
图1 图2 图3
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c5fde48baeda3a1d608fb7c9bef12b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7edadd9995393ece0d7b7bf4801504bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca1d09859dfab140e55e3cc3e7d67d5.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca51f9403facfb2fe553702acc50124b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b30155e0e3cf7c5146d3311e5b8da93.png)
(3)如图3,在(2)的条件下,将直角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfa70e7c9ef8b856b494d370b7d76482.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af6cd332590b9eb4032b51a39134d219.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a679040c4d556723e482bacbab41356d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ac30ad6393440bfa0a4471c132ae2b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca1d09859dfab140e55e3cc3e7d67d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a679040c4d556723e482bacbab41356d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a89bc483f60ab73e2935ce83d0aec7c.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
真题
【推荐1】抛物线y=﹣x2+bx+c经过点A、B、C,已知A(﹣1,0),C(0,3).
(1)求抛物线的解析式;
(2)如图1,P为线段BC上一点,过点P作y轴平行线,交抛物线于点D,当△BDC的面积最大时,求点P的坐标;
(3)如图2,抛物线顶点为E,EF⊥x轴于F点,M(m,0)是x轴上一动点,N是线段EF上一点,若∠MNC=90°,请指出实数m的变化范围,并说明理由.
(1)求抛物线的解析式;
(2)如图1,P为线段BC上一点,过点P作y轴平行线,交抛物线于点D,当△BDC的面积最大时,求点P的坐标;
(3)如图2,抛物线顶点为E,EF⊥x轴于F点,M(m,0)是x轴上一动点,N是线段EF上一点,若∠MNC=90°,请指出实数m的变化范围,并说明理由.
![](https://img.xkw.com/dksih/QBM/2018/4/26/1932243023069184/1933123641876480/STEM/1e601d96519a4694bc2bdc96ebd36da5.png?resizew=313)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐2】在平面直角坐标系
中,直线
与
轴、
轴分别交于点A、B如图所示,点
在线段
的延长线上,且
.
(1)用含字母
的代数式表示点
的坐标;
(2)抛物线y经过点
、
,求此抛物线的表达式;
(3)在第(2)题的条件下,位于第四象限的抛物线上,是否存在这样的点
:使
,如果存在,求出点
的坐标,如果不存在,试说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a82b85d3f59cf6c73fd6f31cb8bd097.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/336910ef09e548c28af8e3c2e6ad0208.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/250463fe0a241ded5e28ac2c0e7ca699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f599f4cc8aa51780501732698705952e.png)
(1)用含字母
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)抛物线y经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(3)在第(2)题的条件下,位于第四象限的抛物线上,是否存在这样的点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a2ca2af1e6981259d84869becc9f23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2019/4/18/2185321284608000/2190227882115072/STEM/dae4b08dc74b4bddbd5c71bdd456142b.png?resizew=188)
您最近一年使用:0次