如果抛物线
的顶点在抛物线
上,同时,抛物线
的顶点在抛物线
上,那么我们称抛物线
与
关联.
(1)已知抛物线
:
与
:
,请判断抛物线
与抛物线
是否关联,并说明理由.
(2)抛物线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
,动点
的坐标为
,将抛物线绕点
旋转180°得到抛物线
,若抛物线
与
关联,求抛物线
的解析式.
(3)点
为抛物线
:
的顶点,点
为抛物线
关联的抛物线的顶点,是否存在以
为斜边的等腰直角三角形ABC,使其直角顶点
在直线
上?若存在,求出
点的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(1)已知抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05bcdec1c2e946161b9e098005d93582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/808f4706d95329e90b24dd283e7110b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4bf74cab74b2b9f188ffd42ac1980cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a44b293e4939c837f47d81974baaaa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4bf74cab74b2b9f188ffd42ac1980cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.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/eec8c29cad12d22ebe68d3fc52048868.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
更新时间:2020-04-06 14:38:01
|
相似题推荐
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【推荐1】如图所示,抛物线
与x轴相交于A、B两点,与y轴相交于点C,点M为抛物线的顶点.
![](https://img.xkw.com/dksih/QBM/2022/4/18/2960881895505920/2970713180405760/STEM/8a8e2faf-4383-4caa-94af-92150bdbfa4f.png?resizew=250)
(1)求点C及顶点M的坐标.
(2)若点N是第四象限内抛物线上的一个动点,连接BN、CN,求
面积的最大值.
(3)直线CM交x轴于点E,若点P是线段EM上的一个动点,是否存在以点P、E、O为顶点的三角形与
相似.若存在,求出点P的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17d794141572c8b1e70957754f32b9eb.png)
![](https://img.xkw.com/dksih/QBM/2022/4/18/2960881895505920/2970713180405760/STEM/8a8e2faf-4383-4caa-94af-92150bdbfa4f.png?resizew=250)
(1)求点C及顶点M的坐标.
(2)若点N是第四象限内抛物线上的一个动点,连接BN、CN,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc1275768bdac801185ef152290a85ce.png)
(3)直线CM交x轴于点E,若点P是线段EM上的一个动点,是否存在以点P、E、O为顶点的三角形与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐2】如图①,直线y=﹣x+c与x轴交于点A(3,0),与y轴交于点B,抛物线y=﹣x2+bx+c经过点A和点B.
(1)求点B的坐标和抛物线的解析式;
(2)M(m,0)为线段OA上一个动点,过点M垂直于x轴的直线与直线AB和抛物线分别交于点P和点N,若以B,P,N为顶点的三角形是等腰直角三角形,求点M的坐标;
(3)如图②,点M′(0,k)在射线BO上自由运动,过点M′垂直于y轴的直线与直线AB交于点Q,与y轴右侧的抛物线交于点N′,若三个点M′,Q,N′中恰有一点是其它两点所连线段的中点(三点重合除外),则称M′,Q,N′三点为“和谐点”.请直接写出使得M′,Q,N′三点成为“和谐点”的k的值.
(1)求点B的坐标和抛物线的解析式;
(2)M(m,0)为线段OA上一个动点,过点M垂直于x轴的直线与直线AB和抛物线分别交于点P和点N,若以B,P,N为顶点的三角形是等腰直角三角形,求点M的坐标;
(3)如图②,点M′(0,k)在射线BO上自由运动,过点M′垂直于y轴的直线与直线AB交于点Q,与y轴右侧的抛物线交于点N′,若三个点M′,Q,N′中恰有一点是其它两点所连线段的中点(三点重合除外),则称M′,Q,N′三点为“和谐点”.请直接写出使得M′,Q,N′三点成为“和谐点”的k的值.
![](https://img.xkw.com/dksih/QBM/2020/11/24/2599988756463616/2601841846525952/STEM/496806c6bd344109ad375e1b19b36a67.png?resizew=422)
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【推荐3】抛物线y=﹣x2+bx+c与x轴交于A,B两点(点A在B左边),与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/2020/4/21/2446052843995136/2446174876991488/STEM/98e15a7071b5495282367ae4369f5079.png?resizew=377)
(1)如图1,已知A(﹣1,0),B(3,0).
①直接写出抛物线的解析式;
②点H在x轴上,D(1,0),连接AC,DC,HC,若CD平分∠ACH,求点H的坐标;
(2)如图2,直线y=﹣1与抛物线y=﹣x2+bx+c交于点D,点E,D关于x轴对称.
①若点D在抛物线对称轴的右侧,求证:DB⊥AE;
②若点D在抛物线对称轴的左侧,请直接判断,BD是否垂直AE?
![](https://img.xkw.com/dksih/QBM/2020/4/21/2446052843995136/2446174876991488/STEM/98e15a7071b5495282367ae4369f5079.png?resizew=377)
(1)如图1,已知A(﹣1,0),B(3,0).
①直接写出抛物线的解析式;
②点H在x轴上,D(1,0),连接AC,DC,HC,若CD平分∠ACH,求点H的坐标;
(2)如图2,直线y=﹣1与抛物线y=﹣x2+bx+c交于点D,点E,D关于x轴对称.
①若点D在抛物线对称轴的右侧,求证:DB⊥AE;
②若点D在抛物线对称轴的左侧,请直接判断,BD是否垂直AE?
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名校
【推荐1】已知抛物线:
的顶点为点
,点
是该抛物线上的任意一点,
.
(1)①当
时,则顶点
的坐标为______;
②当
是任意实数时,顶点
总在直线______上(填直线的解析式);
(2)当
的长度最小时,若
,求
点坐标;
(3)当点
在
轴上时,作
轴于点
,连
,作
于点
,求证:
轴.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/320463d9f4d6f61d6f53801aae00f221.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df80e89c0e6b9c87ec0af6e9209c23d5.png)
(1)①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd876a2ed79c64bacc3e64b8ee92735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0eb2fe52072442c500ec9beb8dd89a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0522607eeb42a499c0f5b040bbdd42e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1460aa3d83df61f6c411b34412135451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa14b8d8aec41fffbc0142ed2cb199ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/886ca8c68781ddfe1bdfb49440e4e34a.png)
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【推荐2】定义:把一个半圆与抛物线的一部分合成封闭图形,我们把这个封闭图形称为“蛋圆”.如果一条直线与“蛋圆”只有一个交点,那么这条直线叫做“蛋圆”的切线.如图,A,B,C,D分别是“蛋圆”与坐标轴的交点,已知点D的坐标为(0,8),AB为半圆的直径,半圆的圆心M的坐标为(1,0),半圆半径为3.
![](https://img.xkw.com/dksih/QBM/2014/2/17/1573705695576064/1573705701826560/STEM/9266d4235acf486785a47073b1ffd1f3.png)
(1)请你直接写出“蛋圆”抛物线部分的解析式
,自变量的取值范围是 ;
(2)请你求出过点C的“蛋圆”切线与x轴的交点坐标;
(3)求经过点D的“蛋圆”切线的解析式.
![](https://img.xkw.com/dksih/QBM/2014/2/17/1573705695576064/1573705701826560/STEM/9266d4235acf486785a47073b1ffd1f3.png)
(1)请你直接写出“蛋圆”抛物线部分的解析式
![](https://img.xkw.com/dksih/QBM/2014/2/17/1573705695576064/1573705701826560/STEM/17bf2ddd28df42219e7b9eba51594111.png)
(2)请你求出过点C的“蛋圆”切线与x轴的交点坐标;
(3)求经过点D的“蛋圆”切线的解析式.
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