已知抛物线
,G为抛物线的顶点
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/d6c76954-7936-4643-9569-256f47404708.png?resizew=328)
(1)如图1,抛物线经过点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b386f68a66d63fd50f5e36a72e11f9d9.png)
①求抛物线的解析式;
②若在第一象限抛物线上有点B,使
,求点B的坐标;
(2)将抛物线
绕顶点G旋转
,新抛物线(如图2)交x轴C、D两点,点P为x轴上方抛物线上的一个动点,直线CP,DP分别交y轴于M、N两点,求OM·ON的最大值(用含a的式子表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30234f918a1181c126b5a2c2107a8d17.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/d6c76954-7936-4643-9569-256f47404708.png?resizew=328)
(1)如图1,抛物线经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b386f68a66d63fd50f5e36a72e11f9d9.png)
①求抛物线的解析式;
②若在第一象限抛物线上有点B,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ecf5ae4ef83709b823821eddbfa5eff.png)
(2)将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9914de04ebd98125dca85f71b212c8d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e7a123c9cc0e058db28841fb0edcf3.png)
更新时间:2022-11-12 10:24:26
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】如图,已知抛物线
与x轴交于
,
两点,与y轴交于
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/77e3ff6f-ef70-4de8-b79b-77d5208f27d2.png?resizew=321)
(1)求抛物线的函数表达式.
(2)设P为抛物线上一动点,点P在直线BC上方时,求
面积的最大值.
(3)若M在抛物线的对称轴上,点N为平面内一点,当以点B、C、M、N为顶点的四边形为矩形时,直接写出所有符合条件的点N的坐标,并选择一个你喜欢的N点,写出求解过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](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/c052d7af2f98d95bac8725b608fba0fc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/77e3ff6f-ef70-4de8-b79b-77d5208f27d2.png?resizew=321)
(1)求抛物线的函数表达式.
(2)设P为抛物线上一动点,点P在直线BC上方时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4234cf4d8159f5df0333bcc269ffe099.png)
(3)若M在抛物线的对称轴上,点N为平面内一点,当以点B、C、M、N为顶点的四边形为矩形时,直接写出所有符合条件的点N的坐标,并选择一个你喜欢的N点,写出求解过程.
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【推荐2】如图,已知抛物线
经过
,
两点,与x轴的另一个交点为
,顶点坐标为点
,与
轴交于点
.
的值;
(2)直线
与
轴交于点
,若
,求直线
与抛物线的另一个交点坐标;
(3)该抛物线上是否存在点
,使得
,若存在,直接出所有符合条件的点
坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c905c723e30f28088fd7f7dc09ef1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe6135111bf42b080199f91bc1e7ee0e.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc2ac0d7b8a2d9c539588a3a7e3791c.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.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/c313c22e3799c781b7acc832ed994535.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(3)该抛物线上是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/900fbaf8693a7435d714b784d683fe7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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解答题-证明题
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【推荐1】(1)如图1,在
中,
,
,点
、
、
分别为
、
、
的中点,求证:
;
(2)如图2,在
中,
,
,点
为
的中点,
,那么
是否成立?证明你的猜想;
(3)如图3,边长为4的等边
外有一点
,
,
,
、
分别是边
、
的点,满足
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fc1ba2766874730daaad7d3bb7a8ee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
(2)如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fc1ba2766874730daaad7d3bb7a8ee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.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/8640efdc1b33d7fb0658edbdd924c878.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c636e71bfc26ffed0ebf551d7abda757.png)
(3)如图3,边长为4的等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8691c8ea88a3eb4de93256f090e6d905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532aece6cfd67e2a97977eed978dbf2b.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89063b47b6f72f5d9e7b3dbc8d5d7731.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
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解答题-问答题
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较难
(0.4)
【推荐2】(1)问题背景
如图1,P为
内部一点,连接
,将
绕,点C顺时针旋转
得到
,连接
,
,
,可知
为___________三角形,故
,又
,故
,由___________可知,当
在同一条直线上时,
取最小值,如图2,最小值为
,此时的P点为该三角形的“费马点”.
(2)问题解决
如图3,在
中,三个内角均小于
,且
,
,
,求
的最小值;
(3)问题应用
如图4,设村庄
的连线构成一个三角形,且
,
,
.现欲在
内部建一中转站P沿直线向
三个村庄铺设电缆,已知由中转站P到村庄
的铺设成本分别为
元
,
元
,
万元
,是否存在合适的P的位置,可以使总的铺设成本最低,若存在请求出成本的最小值.
如图1,P为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef613539d5e569f11d33c1f46d03120.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19736af03116d7cf8b1ebaeda148b63d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a99e1ad0d6fb0f13be56d09086366c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bd317bbea3d695c02357c7ebcfa70c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dafcd7c0c071987b92079243f355891.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e859a0e6d38eaf05756f1012d561062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc0a40248b2d601aa33d94cdc3cf7d90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33b5cf040dbc5948fbe1bc3cde813dd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7fbf7c895ac2ed5bfa19627bbcfdcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1336922d3354875d556b10c684a9085e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7ed53a398b1d6b7b4abbb43a9abcf1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
(2)问题解决
如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392b9e1a179a6676362679354a9e7e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7ed53a398b1d6b7b4abbb43a9abcf1f.png)
(3)问题应用
如图4,设村庄
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff76846660a607dae65b956967b4c2f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31fe51e912e65edc42a8157c37789b06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8606542896b8b6e110c963218e4d76d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392b9e1a179a6676362679354a9e7e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff76846660a607dae65b956967b4c2f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff76846660a607dae65b956967b4c2f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dadc63e6e33743ce590ed968948a5a58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a98024ce2e23a5e81b2bcdd7c96ccef9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dadc63e6e33743ce590ed968948a5a58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a98024ce2e23a5e81b2bcdd7c96ccef9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b1b8bd4a2d822a44598ca977ca7355a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a98024ce2e23a5e81b2bcdd7c96ccef9.png)
您最近一年使用:0次
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(0.4)
【推荐3】问题探究
(1)如下图,等边
中,
,点
在
上运动,当
时,
________.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/e2b3e0ec-9262-4e8c-8115-58949cc61a64.png?resizew=109)
(2)如下图,在
中,
,点
是直线
上一点(不与
、
重合),把线段
绕着点
逆时针旋转至
(即
),使得
,连接
、
,当
,
,请求出
的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/1aacad58-0e30-449a-af3a-34f5f8c15bfa.png?resizew=124)
问题解决
(3)为打造“最美灞桥”,市政府决定对湿地公园的一块空地进行绿化改造,改造为如下图的四边形
,在四边形
中,
米,
,
是
边上的中点,在四边形的内部
点处修建一座亭子,使得
到点
、点
的距离等于
,
米,沿着
修一条走廊,走廊每米造价为1200元,请你帮市政人员规划,求
最短时修建走廊的费用为多少?
(1)如下图,等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.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/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4405d81d841e475ba6af3472ff6a0740.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/e2b3e0ec-9262-4e8c-8115-58949cc61a64.png?resizew=109)
(2)如下图,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6060d9a82ed5405a1ea8cd824448b6b.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43651721f6c0ea4cf50a33054ecc5d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714cc3707bba3bfdb56e251999be8592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/1aacad58-0e30-449a-af3a-34f5f8c15bfa.png?resizew=124)
问题解决
(3)为打造“最美灞桥”,市政府决定对湿地公园的一块空地进行绿化改造,改造为如下图的四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f12ae85718067cbc3679dcd95509bd55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeedb5f361a1baff6338436fff6c471d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/b364f931-aabf-43ba-8a15-5b0e4e0d30ac.png?resizew=115)
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【推荐1】如图,在平面直角坐标系中,矩形OABC的顶点O在坐标原点,边OC在x轴的正半轴上,边OA在y轴的正半轴上,OA=3,AB=4,反比例函数
(k>0)的图象与矩形两边AB,BC分别交于点D,点E,且BD=2AD.
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898374291234816/2914341108948992/STEM/66f8b86e-90e4-4aa5-9ff4-b463d19d91e6.png?resizew=139)
(1)求点D的坐标和k的值;
(2)连接OD,OE,DE,求△DOE的面积;
(3)若点P是线段OC上的一个动点,是否存在点P,使∠APE=90°?若存在,求出此时点P的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898374291234816/2914341108948992/STEM/66f8b86e-90e4-4aa5-9ff4-b463d19d91e6.png?resizew=139)
(1)求点D的坐标和k的值;
(2)连接OD,OE,DE,求△DOE的面积;
(3)若点P是线段OC上的一个动点,是否存在点P,使∠APE=90°?若存在,求出此时点P的坐标;若不存在,请说明理由.
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解答题-证明题
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【推荐2】如图1,在正方形
中,点E是边
上一点(点E不与点B、C重合),
,交
延长线于点F,
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/18/be684ec8-96ad-4b2a-8836-5ac8fedb4145.png?resizew=294)
(1)求证:
;
(2)如图2,连接
,交
于点K,过点D作
交
于点G,垂足为点H,连接
、
.
①求证:
;
②若
,设
,当
是等边三角形时,求x的值;
③当
时,求证:
.
![](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/c175c239742c7ba8fd67a6d5f99cb1b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/18/be684ec8-96ad-4b2a-8836-5ac8fedb4145.png?resizew=294)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/873c23823e616e26c48ff5725e202039.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce50eeb654ef50f36a582c785f273ecf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca14f6100d829f197a5dac5197bbe0b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e0ae50d5993a332b5cddb022eaa6f1e.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1300a53b12fce6a2dc5d46da72c666d4.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1dd8809233c90f66563c34f2164415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d1426d11f66569af1b70ed7913b0c27.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4e60c00c032756bceb4bf7a4d8dd516.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55ad48b97a94a46880ececc33aab7f2e.png)
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【推荐1】如图,在平面直角坐标系中,抛物线y=ax2+bx+3(a≠0)与y轴交于点C,与x轴交于A、B两点(点A在点B的左侧),且A(﹣2,0),直线BC的解析式为y
3.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/5/766975c2-c550-4ad6-b201-cd61e661ce26.png?resizew=464)
(1)求抛物线的解析式;
(2)过点A作AD
BC,交抛物线于点D,点E为直线BC上方抛物线上一动点,连接CE、EB、BD、DC,求四边形BECD面积的最大值时相应点E的坐标;
(3)将抛物线y=ax2+bx+3(a≠0)向左平移2个单位,已知点M为抛物线y=ax2+bx+3(a≠0)的对称轴上一动点,点N为平移后的抛物线上一动点.在(2)中,当四边形BECD的面积最大时,是否存在以A,E,M,N为顶点的四边形为平行四边形?若存在,直接写出点N的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b23c0d2e6eaf292434de457d677e721.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/5/766975c2-c550-4ad6-b201-cd61e661ce26.png?resizew=464)
(1)求抛物线的解析式;
(2)过点A作AD
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
(3)将抛物线y=ax2+bx+3(a≠0)向左平移2个单位,已知点M为抛物线y=ax2+bx+3(a≠0)的对称轴上一动点,点N为平移后的抛物线上一动点.在(2)中,当四边形BECD的面积最大时,是否存在以A,E,M,N为顶点的四边形为平行四边形?若存在,直接写出点N的坐标;若不存在,请说明理由.
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【推荐2】如图,在平面直角坐标系中,抛物线
交x轴于点A、点B,交y轴于点C.直线
经过于点C、点B,
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/2467aa48-1c33-46f1-a845-1042c0345c63.png?resizew=495)
(1)求抛物线的解析式:
(2)点D是第一象限内抛物线上一个动点,点D在抛物线对称轴右侧,点D的横坐标为t,连接
,求
的面积S与t之间的函数关系式,直接写出自变量t的取值范围;
(3)在(2)的条件下,点E是第二象限内抛物线上一动点,连接
交线段
于点F,点G在线段
上,连接
平分
的面积等于16,求点E的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9110552fc9ec2e0c501e0791410df3e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a037686255e42bc0e93db4b66baa3115.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/2467aa48-1c33-46f1-a845-1042c0345c63.png?resizew=495)
(1)求抛物线的解析式:
(2)点D是第一象限内抛物线上一个动点,点D在抛物线对称轴右侧,点D的横坐标为t,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e28e8622e1db9535ecd3f93fc4f0f68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41f0dadf037efedc90b39c57a6880a1a.png)
(3)在(2)的条件下,点E是第二象限内抛物线上一动点,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88273e08c6f04c9f954579a32b462816.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c1f0423da0a400ff6319e202279d0c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/849d8b7de8a2a2328349bda18255f42e.png)
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