直线
与
轴交于点B,与y轴交于点C,抛物线
经过B,C两点,与x轴的另一交点为A,连接
,点P为
上方的抛物线上一动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/18/c000e624-e99a-457c-bcd6-dc26a675fcae.png?resizew=294)
(1)求抛物线的解析式;
(2)如图①,连接
,交线段
于点D,若
,求此时点P的坐标;
(3)如图②,连接
.过点P作
轴,交线段
于点E,若
与
相似,求出点P的横坐标及线段
长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c653f3ac494070e375977c3bcb3ede1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/18/c000e624-e99a-457c-bcd6-dc26a675fcae.png?resizew=294)
(1)求抛物线的解析式;
(2)如图①,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecbb9cb71e7d7b1b18dfa08692ae2a3c.png)
(3)如图②,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/213144e25996b7fd3cd69d9c5ae56be2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f944f78358763be992bb3d55fff12f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
更新时间:2024-03-18 15:06:23
|
相似题推荐
解答题-证明题
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【推荐1】将抛物线C:y=(x﹣1)2向下平移4个单位长度得到抛物线C1,再将抛物线C1向左平移1个单位长度得到抛物线C2.
(1)直接写出抛物线C1,C2的解析式;
(2)如图(1),抛物线C1 与
轴交于A,B两点,与
轴交于C点,且D为第四象限抛物线上一点,连接AD,BC交于点E,连接BD,记
BDE的面积为S1,
ABE的面积为S2,求
的最大值;
(3)如图(2),直线y=kx(k≠0,k为常数)与抛物线C2交于E,F两点,M为线段EF的中点;直线
与抛物线C2交于G,H两点,N为线段GH的中点.求证:直线MN经过一个定点.
(1)直接写出抛物线C1,C2的解析式;
(2)如图(1),抛物线C1 与
![](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/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
(3)如图(2),直线y=kx(k≠0,k为常数)与抛物线C2交于E,F两点,M为线段EF的中点;直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/300edeceaae25e804e3a9cd39a3eefde.png)
![](https://img.xkw.com/dksih/QBM/2021/6/11/2740684639772672/2743587825287168/STEM/dc2b8894-d003-4327-98a1-4955d6ca3a64.png)
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【推荐2】如图,直线y=kx﹣2与x轴,y轴分别交于B,C两点,其中OB=1.
(1)求k的值;
(2)若点A(x,y)是第一象限内的直线y=kx﹣2上的一个动点,当点A运动过程中,试写出△AOB的面积S与x的函数关系式;
(3)在(2)的条件下,探索:
①当点A运动到什么位置时,△AOB的面积是1;
②在①成立的情况下,x轴上是否存在一点P,使△POA是等腰三角形?若存在,请写出满足条件的所有P点的坐标;若不存在,请说明理由.
(1)求k的值;
(2)若点A(x,y)是第一象限内的直线y=kx﹣2上的一个动点,当点A运动过程中,试写出△AOB的面积S与x的函数关系式;
(3)在(2)的条件下,探索:
①当点A运动到什么位置时,△AOB的面积是1;
②在①成立的情况下,x轴上是否存在一点P,使△POA是等腰三角形?若存在,请写出满足条件的所有P点的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2020/1/9/2373210378895360/2373645341196288/STEM/cdac29c3b61745db8400bc5ce50e123d.png?resizew=159)
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【推荐1】如图,在直角坐标系中,O为坐标原点,二次函数
的图象与
轴的正半轴交于点
,与
轴的正半轴交交于点
,且tan∠OAB=2.设此二次函数图象的顶点为
.
![](https://img.xkw.com/dksih/QBM/2012/2/23/1573344196616192/1573344270344192/STEM/ebfc83aef3164eb798d326d1890ac0e3.png?resizew=201)
(1)求这个二次函数的解析式;
(2)将
绕点
顺时针旋转
后,点
落到点
的位置.将上述二次函数图象沿
轴向上或向下平移后经过点
.请直接写出点
的坐标和平移后所得图象的函数解析式;
(3)设(2)中平移后所得二次函数图象与
轴的交点为
,顶点为
.点
在平移后的二次函数图象上,且满足
的面积是
面积的
倍,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e70973d67e2366d4872b4698c0298790.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2012/2/23/1573344196616192/1573344270344192/STEM/ebfc83aef3164eb798d326d1890ac0e3.png?resizew=201)
(1)求这个二次函数的解析式;
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ed6bee57f4526320197d6a7474386f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b12d93bd1130088b622602a6c21c9c2d.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(3)设(2)中平移后所得二次函数图象与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5ed513f56811aa1d314514c5c10d90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0c57dc5389fb6058aa3f2302a992839.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/746fb235435d35363e9c695cb831c756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab9275c191c5b47b263acab3a6c2988f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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名校
【推荐2】如图所示,在平面直角坐标系xoy中,抛物线
交x轴于A、B两点,交y轴于C点,且对称轴为直线
.
(2)若点
是y轴上的一个动点,是否存在以P、A、D三点为顶点的三角形与
相似?如果存在,求点P的坐标;如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db058d79c5e148b422ba9527111c9a7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d99c05be44c06ac971fd19a25d473d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
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【推荐1】【问题情境】在数学活动课上,同学们在课上用两张矩形纸片进行探究活动.小组同学准备了两张矩形纸片
和
,其中
,
,将它们按如图1所示的方式放置,点E,G分别落在
,
边上时,点E,G恰好为边
,
的中点.然后将矩形纸片
绕点B按顺时针方向旋转,旋转角为
,连接
与
.
(1)如图2所示,当
时,小组成员发现
与
存在的数量关系为_________;位置关系为_________;
【探索猜想】
(2)如图3所示,当
时,(1)中发现的结论是否仍然成立?请说明理由;
【拓展延伸】
(3)在矩形
的旋转过程中,
交
于点P,
交
于点O,连接
,
,
是否为定值;如果是,请直接写出此定值,如果不是,请你说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a10eec76d00779458ce81639d71c635d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a10eec76d00779458ce81639d71c635d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
(1)如图2所示,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ac762a2899a58faa0d3ab44f1281fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
【探索猜想】
(2)如图3所示,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13b5ea2fc43b19ca043581eb94197234.png)
【拓展延伸】
(3)在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a10eec76d00779458ce81639d71c635d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b348cef81feb80ed7e79a5d9e67ef48d.png)
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【推荐2】如图1,矩形
的两条对角线交于点O,点P是
边上一个动点,连接
,作
,垂足分别是E,F,连接
.
(1)求证:
;
(2)如图2,延长
交
于点G,若
,猜想
与
有怎样的数量关系,并证明你的结论;
(3)在(2)的条件下,已知
,求
的值.
![](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/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee17514e4237362e1b4525a9acf55bb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4b26de3557cd4a553655330372096d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/27/65e46664-a3dd-4c43-894c-5e7e4f74099c.png?resizew=330)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf2e3236ea30ee2c37928b98041f13a.png)
(2)如图2,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5757d7b9f62ec9c8a30115fcb3bb49c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(3)在(2)的条件下,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1cec6ba1368cb4afd4fe20fcd721975.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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真题
【推荐1】如图,抛物线
与
轴的负半轴交于点
,与
轴交于点
,连结
,点
在抛物线上,直线
与
轴交于点
.
(1)求
的值及直线
的函数表达式;
(2)点
在
轴正半轴上,点
在
轴正半轴上,连结
与直线
交于点
,连结
并延长交
于点
,若
为
的中点.
①求证:
;
②设点
的横坐标为
,求
的长(用含
的代数式表示).
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/e96d4caccf7e447a862e597f7d220c9e.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/1069ebea2fcb407a9edf350ba66b4de1.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/e5014dbdcfa94e7ca71c3a1a6c2a12d0.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/850a8c4c8dd74e3dad18828cdda5f792.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/3d68fa722b1845d78b469f8dc8fbedc4.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/47d1fd9dc80c4a8aa0ee4b3e8ed06985.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/d6aa3f3b18b54adebc41c2a7dd779c24.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/f71a3e2b1e534956a3b63af3c476e2c6.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/850a8c4c8dd74e3dad18828cdda5f792.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/9b9bf3a4359848da97a4ebae9e700322.png)
(1)求
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/33e8faf6d8e64d35ad553114e9052439.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/f71a3e2b1e534956a3b63af3c476e2c6.png)
(2)点
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/d395d180c040418e83ffa2b0795cd56e.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/1069ebea2fcb407a9edf350ba66b4de1.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/3374517f4d754bac9fd5fa8b09e8b708.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/850a8c4c8dd74e3dad18828cdda5f792.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/bf1df17af9e84c37ac2ffe11c78691de.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/f71a3e2b1e534956a3b63af3c476e2c6.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/c584faf3cd8c4972aa3f48ced4d0ea9e.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/b100c53b2f0148a5bf408a4d53a27d5c.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/47d1fd9dc80c4a8aa0ee4b3e8ed06985.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/cd0214021f43477185e4386d7937f8f8.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/c584faf3cd8c4972aa3f48ced4d0ea9e.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/bf1df17af9e84c37ac2ffe11c78691de.png)
①求证:
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/500e4cf7dff749828877e89381a244b2.png)
②设点
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/c584faf3cd8c4972aa3f48ced4d0ea9e.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/e1775a28ebaf4be2813c138a135ad2a4.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/16a1a11a4b8f419681a4b863de55c051.png)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1773760323895296/1773760324313088/STEM/e1775a28ebaf4be2813c138a135ad2a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/30/ef9acc31-82fe-4cc1-bf85-606607552bc3.png?resizew=178)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图,已知点A(1,0),B(0,3),将Rt△AOB绕点O逆时针旋转90°,得到Rt△COD,CD的延长线,交AB于点E,连接BC,二次函数
的图象过点A、B、C.
(1)求二次函数的解析式;
(2)点P是线段BC上方抛物线上的一个动点,当∠PBC=75°时,求点P的坐标;
(3)设抛物线的对称轴与x轴交于点F,在抛物线的对称轴上,是否存在一点Q,使得以点Q、O、F为顶点的三角形,与△BDE相似?若存在,请求出点Q的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b98d7c51fffe96fbc4859b5c639bd05b.png)
(1)求二次函数的解析式;
(2)点P是线段BC上方抛物线上的一个动点,当∠PBC=75°时,求点P的坐标;
(3)设抛物线的对称轴与x轴交于点F,在抛物线的对称轴上,是否存在一点Q,使得以点Q、O、F为顶点的三角形,与△BDE相似?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/2018/5/8/1940825692266496/1942908640272384/STEM/ca49c8cba8a049f7890a815675de6c0e.png?resizew=207)
您最近一年使用:0次