1 . 如图,将菱形纸片ABCD沿过点A的直线折叠,点C,D的对应点分别是
,且
,折痕AP交BC于点P.若
,
,则PC的长等于______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c37547156910f5307b8a0c496909f92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/032b12244133a814fe29c3e781046695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d4d00b86b2f067b902baf6e52f0faab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/17/33c93223-1736-4d0e-86ba-86cd74827cf1.png?resizew=213)
您最近一年使用:0次
2 . 抛物线
交
轴于
,
两点,与
轴交于点
,连接
,
.
为线段
上的一个动点,过点
作
轴,交抛物线于点
,交
于点
.
(1)求抛物线的表达式;
(2)设
点的坐标为
,请用含
的代数式表示线段
的长,并求出当
为何值时,
有最大值,最大值是多少?
(3)试探究点
在运动过程中,是否存在这样的点
,使得以
为顶点的三角形是等腰三角形,若存在,请直接写出此时点
的坐标;若不存在,请说明理由.
(4)在(2)的条件下,直线
上有一动点
,连接
,将线段
绕点
逆时针旋转
度,使点
的对应点
恰好落在该抛物线上,直接写出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90731f6d4190300b33385ce70eb2783a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a18a7caa080988802ba1145b4fe4203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ba5cbb31299d683ac6c7dd795db85.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3a3db6d96518255f96ad7fc1ac98f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/17/5ba93605-d185-4d25-97f1-868993619271.png?resizew=168)
(1)求抛物线的表达式;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b62769b7177ef4bc952dc1dd51d6b510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(3)试探究点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/557efcd952a41e4a2ed82928445429cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(4)在(2)的条件下,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25b2e7aa38de090bb39fa058323d2eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25b2e7aa38de090bb39fa058323d2eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a17161b28b6ad8f57abc5b11e1b6c671.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
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3 . 如图,抛物线
与x轴交于A,B两点(点A在点B的左侧),与y轴交于点C,连接
,
.点P是第四象限内抛物线上的一个动点,点P的横坐标为m,过点P作
x轴,垂足为点H,
交
于点Q,过点P作
交x轴于点E,交
于点F.
(1)求A,B,C三点的坐标.
(2)试探究在点P运动的过程中,是否存在这样的点Q,使得以A,C,Q为顶点的三角形是等腰三角形?若存在,请直接写出此时点Q的坐标;若不存在,请说明理由.
(3)请用含m的代数式表示线段
的长,并求出m为何值时
有最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/049b952e81e2d3f7519c22cc043dd652.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/b17622ea6f6f5afd1ad817a557e5889d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d58f9019097bd05037aefd5c322916.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fffbf0e58e053293db8f18e78e5f30c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/14/bae20c38-b915-4c31-af5f-e90a8822b9dd.png?resizew=165)
(1)求A,B,C三点的坐标.
(2)试探究在点P运动的过程中,是否存在这样的点Q,使得以A,C,Q为顶点的三角形是等腰三角形?若存在,请直接写出此时点Q的坐标;若不存在,请说明理由.
(3)请用含m的代数式表示线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8db072e2b6104671b82f948012fb45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8db072e2b6104671b82f948012fb45.png)
您最近一年使用:0次
4 . 在
中,
.
(1)如图1,在
内取点
,连接
,
,将
绕点
逆时针旋转至
,
,连接
,
,
,若
,求
的长;
(2)如图2,点
为
中点,点
在
的延长线上,连接
交
于点
,
,连接
并延长至点
,连接
,若
,
,求证:
;
(3)如图3,
,点
在
的延长线上,连接
,在
上取点
,
,连接
,若
,当
取最小值时,直接写出
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/13/fc5b1f0a-b61c-4064-961b-705a1459f308.png?resizew=328)
(1)如图1,在
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.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/e8abfdaab699cfe51bb9678110ad6aee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c6458d908f7a6ecf30d264943e2f15e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f81aac3d6df445357b50249169190913.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)如图2,点
![](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://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/458f98e7078cb3259c18542be9749feb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce8f887360a533f0a25b0b34fb11f0a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f464d2228d8386b16d2614a2c30e917.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2a7c9475e30ce262a74afabea51b901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c3247a001d64fcdf596f698d646e852.png)
(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15d6fb09f34b29aaacd34d062fa33f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18444ec3e5e3b8a0cf488732c34866d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07fbad473c16df3ff62c1c6b37de6aa8.png)
您最近一年使用:0次
5 . 一次函数
的图象与x轴、y轴分别交于点A,B,点C是OA的中点,过点C作
于C,CD交一次函数图象于点D,P是OB上一动点,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4de869ae6b6dc5b79fcae3de540b30bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/affbe2d2ced2303d8c3d183746d0bcf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186dee1a1cf68677d143172a2a50709c.png)
A.4 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-09-05更新
|
128次组卷
|
2卷引用:广东省佛山市第二中学2021-2022学年高一上学期新生入学考试数学试题
6 . 在
中,
,将线段
绕点
旋转
,得到线段
,连接
.
(1)如图1,若将线段
绕点
逆时针旋转
得到线段
,线段
交于点
,求证:
;
(2)如图2,将线段
绕点
顺时针旋转
时,若
的平分线
交
于点
,交
的延长线于点
,连接
.求证:
;
(3)在(2)的条件下,取
的中点
,如图3,连接
和
,请直接写出
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7f97bf47387beb9f9fd0253b8a21234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05df5a26c2b978503e93efa040b99508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a77aa6c27acfffcc601d9ca7e6d4c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/6/e8761477-21e7-4a64-a056-d189f8ce942e.png?resizew=415)
(1)如图1,若将线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70daa268c7a0b17f39c1e6eba043a3b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55b6ce55e67f6e95e616eaf1ca3f6f8.png)
(2)如图2,将线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50227539f98fa14b1cd80dd74f282ac4.png)
(3)在(2)的条件下,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/2273ae1ee99cec9c1304323bc9ebf75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91eba3ebc2cb915f65bd91d946287bd8.png)
您最近一年使用:0次
7 . 已知,在
中,
,
,D为线段
上一点,连接
,过点C作
,
,连接
,延长
到点E,连接
,使得
.
(1)如图1,若
,求
的长;
(2)如图2,点G是线段
上一点,连接
,过点G作
,过点D作
,交
于点H,求证:
;
(3)如图3,点M为
上一点,连接
,若
,
,请直接写出
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f1a23f51a2ff0896988930f5209fc64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aebb5baea4ac1668b674a8634e15bcbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e3a050023572923d07e5dfe7331d1d3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/3/97c4562d-ecff-4562-8162-8990277527e8.png?resizew=587)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca1952b05bb629483a8217cf507f9309.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
(2)如图2,点G是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4db1e6666de61eb94dd749fc95496d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edfab24a9cb9315013b7e288ffe3eca3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51ca5432277c7163b99aabbccc254731.png)
(3)如图3,点M为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d783fe7f3ce673d5d21281174e7a7968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5fc7b695498b5f84bb41f0b3404e786.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0277e5c10716e890877bf7daf1cbac93.png)
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8 . 如图(1),在
和
中,∠
∠
,
,
,点E在
内部,
之间存在怎样的数量关系?问题探究:
(1)先将问题特殊化如图(2),当点D,F重合时,直接写出一个等式,表示AF,BF,CF之间的数量关系;
(2)再探究一般情形如图(1),当点D,F不重合时(1)中的结论仍然成立.
(3)如图(3),在
和
中,∠
∠
,
,
(k是常数),点E在
内部,直接写出一个等式,表示线段AF,BF,CF之间的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6cfc1ef64a936ca570899d2f9d3ed0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e99ba4000c308df0b0b9d9c95af7750.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3ca0f2b2b40440365fcce22ac32c0ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0ec8abe5af19094282bf63a98fde427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f92d3a98b016927de4bbb9b9564894f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/29/c9b7ded6-a8c4-445f-a0f0-8f4d74fd36ef.png?resizew=191)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/29/e2eb6686-889d-490d-903f-616d1514fb68.png?resizew=194)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/29/d707c321-bd78-4b6b-ad13-3d24b3636524.png?resizew=215)
(1)先将问题特殊化如图(2),当点D,F重合时,直接写出一个等式,表示AF,BF,CF之间的数量关系;
(2)再探究一般情形如图(1),当点D,F不重合时(1)中的结论仍然成立.
(3)如图(3),在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6cfc1ef64a936ca570899d2f9d3ed0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e99ba4000c308df0b0b9d9c95af7750.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54700d4ece8fa8e39ea49e658c9b1de7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b3b0568855a132ae04f1c199db7494f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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9 . 如图,
中,
,
于点
,
,
是线段
上的一个动点,则
的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eeb0c8df3d8c5260768c5e407b3583a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d320f180419175d75eebc618cc458b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f020051f12188f88c4ab785234f60bde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65363d912d8dae2cdcc9cfe121205c81.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/15/abf0275f-9d3b-4795-8ae4-54cf4cfde07b.png?resizew=156)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
10 . 如图(1),抛物线
经过
,
两点,并与直线
(
为常数,且
)交于
、
两点,直线
过点
且平行于
轴,过
、
两点分别作直线
的垂线,垂足分别为点
、
.
(1)求此抛物线的解析式;
(2)猜想与证明:
①
______
______
(填“>”“<”或“=”)
②
为______三角形(填“锐角”、“直角”或“钝角”)并证明你的猜想
(3)如图(2)点
为坐标平面内一点,点
是抛物线上任意一点,求
周长最小值,并求出此时
点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8e335fecc2105f095fe41e8739db935.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/238f0ea276a00ae8d681ce00cc11c8ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edaef66a0582e95fb5c57a405acdea9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac02a054bd0771a56987af33454baaea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c80c26a794a844127aae7dee87c93b.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c35bf8c29fc8004451de66e12b4de9fa.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/29/12c91dec-63b2-4907-b4ec-b41b9b0a5f64.png?resizew=176)
(1)求此抛物线的解析式;
(2)猜想与证明:
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
(3)如图(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48eced443f5b969c6be558849c7bd8ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81ab141e7a809aa0f7f46c9df9de2b0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/29/c30b9589-f196-4fe9-a412-6beaac51879c.png?resizew=175)
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