已知抛物线
与
轴交于点
、
(点
在点
的右侧),与
轴交于点
.
![](https://img.xkw.com/dksih/QBM/2020/8/21/2532610764808192/2532713409593344/STEM/09c343a2959843c2af5c14f9432503ac.png?resizew=432)
(1)如图1,点
为抛物线顶点,以点
为圆心,1为半径作⊙A,点
为⊙A上的动点,连接
、
,求
的最小值;
(2)如图2,若点
是直线
与抛物线对称轴的交点,以
为圆心,以1为半径作⊙H,点
是⊙H上一动点,求
的最小值;
(3)如图3,点
是抛物线上的点,且横坐标为2,过点
作
轴于点
,点
是以
为圆心,1为半径的⊙O上的动点,连接
、
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3236d825b994ee9c28e5d5479a57b8ed.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/5963abe8f421bd99a2aaa94831a951e9.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://img.xkw.com/dksih/QBM/2020/8/21/2532610764808192/2532713409593344/STEM/09c343a2959843c2af5c14f9432503ac.png?resizew=432)
(1)如图1,点
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d484bf02cff33fd2121ae1db6d8dfe1.png)
(2)如图2,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/674a39387320dc76db1489d0da3e48d3.png)
(3)如图3,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d84acd3c96e20c0ce064aac125f7fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fca8e046874e53ca65d602f85b8602ae.png)
更新时间:2020-08-21 18:01:32
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】如图1,在平行四边形
中,
平分
,且交
于点
,交
的延长线于点
.
(1)求证:
.
(2)如图2,若
,
,
交于点
,
是
的中点,连接
,
.
①求证:
.
②当
,
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/20/96b57821-5c57-4167-afa2-804cabcb6002.png?resizew=340)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac679f877d3e3b3acef1f1f8e3654b4b.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa2b08ac10d44e9b25bc222f8b6a66a4.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af4e676041477b5d0ff8b53fdfe032f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
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【推荐2】如图,
中,
,点
是
上一点,以点
为圆心,以
为半径作
分别交
于点
与
相切于点
.连接
相交于点
.
猜想:
与
的数量关系,并证明你的猜想;
若
,求
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/507e12d9f005670d07bb30c15ee8596c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8cfd06965af6014208127f2880b476b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/298cc3d9bc6dc88c494b5489ee2ca846.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c14817143cfe235d7b9286ee9729353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1cc90729980881a2b8b938504b27371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f000e57d822aa64ffc9b85856d335f48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/2020/3/28/2429126078955520/2429374526177280/STEM/6c389251dc4544a19f439bc041b4911d.png?resizew=238)
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【推荐3】综合与实践
探究主题 | 直角三角板与圆 |
探究背景 | 学习了《圆周角》中的推论:“直径所对的圆周角等于![]() ![]() |
探究 任务1 | 找到画直径的简单方法:把直角顶点放在圆上,连接两直角边与圆的两个交点,连两交点的连线是直径.请你说出其中原理:____________. |
探究 任务2 | 用电脑作图工具,对直角顶点在圆外的情况进行动态模拟,发现:无论直角顶点在圆外如何运动,只要两直角边与圆有两个交点,两条直角边所夹的两段弧的度数差不变,为![]() ![]() ![]() 证:如图3,连接 ![]() ![]() 又 ![]() ![]() ![]() ![]() 探究任务:运用 ![]() ![]() |
探究 任务3 | 当直角顶点运动到圆内时如图4,直角![]() ![]() ![]() 你的猜想:_________(可以用文字描述,也可以结合图形用几何语言描述) 证明: |
探究 任务4 | 各研究小组进行拓展研究比赛,其中高斯研究小组提出问题: 如图,若弦 ![]() ![]() 你的解答是: |
您最近一年使用:0次
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较难
(0.4)
【推荐1】如图1, 矩形
中,点
在
上,连接
,作
分别交
于
于
.
(1)若
求
的长;
![](https://img.xkw.com/dksih/QBM/2020/6/15/2485454361763840/2490961639628800/STEM/77707c93b662459797545c8de1568ddf.png?resizew=270)
(2)如图2,取
的中点
,连接
交
于
,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e80c639b2a82aa53e6b4a388da67ccc7.png)
②求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e4e5891aac2072da16c7d0b147ba97f.png)
②求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a545a99d68cb3b1982c1af0c16e433.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/187ed13a7bd532bd39af5e5ad7493a2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53d48775865d5c53c7ae3eca1decbc3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/815e6d8b5098b7e7d9baa7ad04836211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/2020/6/15/2485454361763840/2490961639628800/STEM/77707c93b662459797545c8de1568ddf.png?resizew=270)
(2)如图2,取
![](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/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e80c639b2a82aa53e6b4a388da67ccc7.png)
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e4e5891aac2072da16c7d0b147ba97f.png)
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a545a99d68cb3b1982c1af0c16e433.png)
![](https://img.xkw.com/dksih/QBM/2020/6/15/2485454361763840/2490961639628800/STEM/a37fe49f93124cf2975d9bfd61bc7d65.png?resizew=270)
您最近一年使用:0次
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名校
【推荐2】如图1,
内接于圆
为直径,点
在
的上方,且
.连结
是
边上的高,过点
作
交
的延长线于点
,交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/0156fb82-8867-4206-b420-e5b8940f5b23.png?resizew=302)
(1)求证:
.
(2)当
时,求
的值.
(3)如图2,取
的中点
,连结
.
①若
,在点
运动的过程中,当四边形
的其中一边长是
的2倍时,求所有满足条件的
的长.
②连结
,当
的面积是
的面积的2倍时,则
______(请直接写出答案)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4431065d83e01168bc4c3e6648381a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca66a268d6f46e0e9d5d9151b785be60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c74209829add874d1d4173658533aae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa8951aaf5916959f5d97a1c55ddb262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1932b7eba41cc74bd9e63fa0558277d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/0156fb82-8867-4206-b420-e5b8940f5b23.png?resizew=302)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8411143df49c7d69664447b543304d84.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3aa1da9eef031c9562154530cbafb33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3e1e795d61298f1195e2fea4baa4a5d.png)
(3)如图2,取
![](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/9f0009063fe00277645aff1be6e32471.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be0b3769c75787e0deca894c98f0262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
②连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7409f0e539040500eb449b7a045f0ef0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/022f0dc17db5fcc83b204dc845447ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9666b5a060ae3083809447f154217ed.png)
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【推荐3】综合与实践
【问题情境】在数学活动课上,同学们以等边三角形为背景,探究动点运动过程中产生的数学问题.已知
是等边三角形,
,点
是射线
上的一点,以
为边作矩形
(顶点
,
,
,
按逆时针顺序排列),其中
,直线
分别与射线
、直线
交于点
,
.
1.【初步探究】针对老师给出的问题背景,小敏画出了点
与点
重合时的图形,如图
,并提出如下问题,请你解答:
(1)猜想
与
的数量关系,并说明理由;
2.【深入思考】
(2)在小敏研究的基础上,小捷同学画出了点
恰好是
的中点时的图形,如图
,求此时
的值;
3.【拓展延伸】
(3)在点
运动过程中,直接写出当
时
的值.
【问题情境】在数学活动课上,同学们以等边三角形为背景,探究动点运动过程中产生的数学问题.已知
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58052cd7d89b0d8556f5a082162dc324.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
1.【初步探究】针对老师给出的问题背景,小敏画出了点
![](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/bdaa19de263700a15fcf213d64a8cd57.png)
(1)猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1460aa3d83df61f6c411b34412135451.png)
2.【深入思考】
(2)在小敏研究的基础上,小捷同学画出了点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38045bc304b504929add4ff5b93509e3.png)
3.【拓展延伸】
(3)在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1defd7bd31b50762679d1439aa9b67cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38045bc304b504929add4ff5b93509e3.png)
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【推荐1】如图,抛物线y=﹣x2+bx+c与x轴交于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是直线CD上方的抛物线上一动点,过点P作PF⊥x轴于点F,交 线段CD于点E,设点P的横坐标为m.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/4/831697a1-69f7-4d43-b8d8-e05666995d91.png?resizew=170)
(1)求抛物线的解析式;
(2)求PE的长最大时m的值.
(3)Q是平面直角坐标系内一点,在(2)的情况下,以P、Q、C、D为顶点的四边形是平行四边形是否存在?若存在,请直接写出存在 个满足题意的点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/4/831697a1-69f7-4d43-b8d8-e05666995d91.png?resizew=170)
(1)求抛物线的解析式;
(2)求PE的长最大时m的值.
(3)Q是平面直角坐标系内一点,在(2)的情况下,以P、Q、C、D为顶点的四边形是平行四边形是否存在?若存在,请直接写出存在 个满足题意的点.
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名校
【推荐2】如图,在平面直角坐标系中,抛物线
交x轴于A,B两点,与y轴交于点C,连接
,
.
(1)求线段
的长度;
(2)点P是直线
上方抛物线上的一动点,过点P作x轴的垂线分别交
,x轴于点M,N.求
的最大值及此时点P的坐标;
(3)在(2)中
取得最大值的条件下,将该抛物线沿射线
方向平移
个单位长度,Q为P点的对应点,平移后的抛物线与y轴交于点F,点E是平移后的抛物线的对称轴上的一点,平面直角坐标系内是否存在一点M,使得以点E、F、Q、M为顶点的四边形是以
为边的菱形,写出所有符合条件的点M的坐标,并任选其中一个点的坐标,写出求解过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e1b442d941041611afe027d07685486.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/20/eb9b94e0-b171-40ed-8bbb-2c7ea3be8ab2.png?resizew=204)
(1)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)点P是直线
![](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/c2bb1548ddc0e5536a35b1bd78c4e7cd.png)
(3)在(2)中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2bb1548ddc0e5536a35b1bd78c4e7cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2d52429c8324350309f77e7209a5c35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b15febfda66e733f14aa7115ed4343a8.png)
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【推荐1】平面上两点间距离公式是解析几何中重要的公式之一,如图所示,
,
,则
.请用所学知识解决问题:
![](https://img.xkw.com/dksih/QBM/2021/4/28/2709631266496512/2715941501591552/STEM/e3b6a217-5662-4e69-b92a-d2bffe9b8fbe.png?resizew=177)
![](https://img.xkw.com/dksih/QBM/2021/4/28/2709631266496512/2715941501591552/STEM/ef6bc78e-1e7e-4bba-880c-c4094d261745.png?resizew=623)
已知道
半径为3,
(1)如图1,
为圆上任意一点,请探究x,y的关系式;
(2)如图2,已知
,QA为
切线,
,且
,求b关于a的函数关系式;
(3)如图3,M点坐标
,在x轴上是否存在点N(不同于点M),满足对于
上任意一点P,都有
为一常数,若存在求出N点坐标,若不存在请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b225d772013d021cf1bfe7b9421fa5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b7e35faab6d74fa0c36599c39d1698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d221b02c865907c755c3bd52fadf846.png)
![](https://img.xkw.com/dksih/QBM/2021/4/28/2709631266496512/2715941501591552/STEM/e3b6a217-5662-4e69-b92a-d2bffe9b8fbe.png?resizew=177)
![](https://img.xkw.com/dksih/QBM/2021/4/28/2709631266496512/2715941501591552/STEM/ef6bc78e-1e7e-4bba-880c-c4094d261745.png?resizew=623)
已知道
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(1)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
(2)如图2,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8544f8483269db90305fa747eeac8b4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e396c83557ec8b2b4b12d97d6738819.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05d344c4876db606024d81e6de01fe06.png)
(3)如图3,M点坐标
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c2f59980057f51e5cf3e86038cfaa16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48458daf573dcfb15f1d78d39c243cf0.png)
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【推荐2】在直角坐标系xOy中,已知点P是反比例函数y=
(x>0)图象上一个动点,以P为圆心的圆始终与y轴相切,设切点为A.
(1)如图1,当⊙P运动到与x轴相切,设切点为K,试判断四边形OKPA的形状,并说明理由;
(2)如图2,当⊙P运动到与x轴相交,设交点为点B、C.当四边形ABCP是菱形时,求出点A、B、C的坐标;
(3)在(2)的条件下,求出经过A、B、C三点的抛物线的解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6ce3a7eb40b71e3e63602931dae81b4.png)
(1)如图1,当⊙P运动到与x轴相切,设切点为K,试判断四边形OKPA的形状,并说明理由;
(2)如图2,当⊙P运动到与x轴相交,设交点为点B、C.当四边形ABCP是菱形时,求出点A、B、C的坐标;
(3)在(2)的条件下,求出经过A、B、C三点的抛物线的解析式.
![](https://img.xkw.com/dksih/QBM/2019/1/15/2119246137229312/2120663761256448/STEM/274147dc59f5460183233c8919aa630e.png?resizew=347)
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【推荐3】如图1,
为半圆
直径
上一动点,
为半圆上一定点,连接
和
,
平分
交
于点
,连接
和
.如果
,
,设
,
两点间的距离为
,
,
两点间的距离为
,
,
两点间的距离为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/31707e62-05ab-4315-856d-afd3c559b233.png?resizew=158)
小明根据学习函数经验,分别对函数
和
随自变量
变化而变化的规律进行了探究.
下面是小明的探究过程,请将它补充完整:
(1)按表中自变量
值进行取点、画图、测量,得到了
和
与
几组对应值:
问题:上表中的
;
(2)在同一平面直角坐标系
中(见图
,描出补全后的表中各组数值所对应的点
和
,并画出函数
和
的图象;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/6cfc02a5-ff21-4357-b473-a75906c18423.png?resizew=256)
(3)结合函数的图象,解决问题:当
为等腰三角形时,
的长度约为
(结果精确到
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82cf997be91eba5aa57c308a3461c799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23421a385847a5a42be966bcaea3b990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d19f6c71e82001bb106b6f1389046b79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1106faf20d6bcfc3c7534fe7a425733.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/1032dbdde50ce13878065b67165c0052.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/31707e62-05ab-4315-856d-afd3c559b233.png?resizew=158)
小明根据学习函数经验,分别对函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
下面是小明的探究过程,请将它补充完整:
(1)按表中自变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
0 | 1 | 2 | 3 | 4 | 5 | 6 | |
2.50 | 2.27 | 2.47 | 3.73 | 4.56 | 5.46 | ||
2.97 | 2.20 | 1.68 | 1.69 | 2.19 | 2.97 | 3.85 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97153bc3d02dfb38ee046487a8037a41.png)
(2)在同一平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad217e26bd3580c35998109de14cef73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39be8bf07c86588e611163ba9da99b71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ed83c6a94190157997a018e1435aa2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/6cfc02a5-ff21-4357-b473-a75906c18423.png?resizew=256)
(3)结合函数的图象,解决问题:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33c2aa4cb5a3b8da3b188ab6a21520c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97153bc3d02dfb38ee046487a8037a41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8824e5d2981053b0473f658ba9001a11.png)
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