如图1,若关于x的二次函数
(a,b,c为常数且
)与x轴交于两个不同的点
,
,与y轴交于点C,抛物线的顶点为M,O是坐标原点.
![](https://img.xkw.com/dksih/QBM/2022/4/28/2974992577486848/2980517933858816/STEM/81a9aea8-5869-4ea9-a5db-be57ed1d1da7.png?resizew=510)
(1)若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c6771f11ed8bc58578ae96d268de02d.png)
①求此二次函数图象的顶点M的坐标;
②定义:若点G在某一个函数的图象上,且点G的横纵坐标相等,则称点G为这个函数的“好点”.求证:二次函数
有两个不同的“好点”.
(2)如图2,连接
,直线
与x轴交于点P,满足
,且
的面积为
,求二次函数的表达式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e10e1c43b86a8cd4360ca9b57232164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ec3d75e53b990bc8f9a4622928dd21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5487be8710e8592179ad6cf622b4983a.png)
![](https://img.xkw.com/dksih/QBM/2022/4/28/2974992577486848/2980517933858816/STEM/81a9aea8-5869-4ea9-a5db-be57ed1d1da7.png?resizew=510)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c6771f11ed8bc58578ae96d268de02d.png)
①求此二次函数图象的顶点M的坐标;
②定义:若点G在某一个函数的图象上,且点G的横纵坐标相等,则称点G为这个函数的“好点”.求证:二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884b508394b3ab50734b584d9ec783c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884b508394b3ab50734b584d9ec783c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45f3206a00777a7efa758431a8384a29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12ccd3d6c6721003075b874b00ef041d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
更新时间:2022-05-16 10:22:10
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】[综合与实践]问题情境:数学活动课上,老师提出如下问题;将两个全等的矩形
和
按图
所示方式摆放,其中点
在
上,点
在
上,
与
交于点
.求证:
垂直平分线段
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/14/e8434561-ec2b-4a69-bf59-eedb4d19bb99.png?resizew=384)
(1)[数学思考]请你解决老师提出的问题;
(2)[问题解决]将矩形
以点
为中心,顺时针旋转到图
所示位置,
与
交于点
.则老师所提问题的结论是否仍然成立?请说明理由.
(3)[拓展探究]如图
,在矩形
以
为中心,顺时针旋转的过程中,当点
恰好落在
边上时,点
恰好落在边
上,若
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff559e1b4757c3dfd97d480617bfed33.png)
,则
的长度值为___________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/14/e8434561-ec2b-4a69-bf59-eedb4d19bb99.png?resizew=384)
(1)[数学思考]请你解决老师提出的问题;
(2)[问题解决]将矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
(3)[拓展探究]如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff559e1b4757c3dfd97d480617bfed33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b91d650c2fc1a741fabdb333b09aeb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
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【推荐2】给出如下规定:两个图形G1和G2,点P为G1上任意一点,点Q为G2上任意一点,如果线段PQ的长度存在最小值,就称该最小值为两个图形G1和G2之间的“近距离”;如果线段PQ的长度存在最大值,就称该最大值为两个图形G1和G2之间的“远距离”.请你在学习、理解上述定义的基础上,解决下面问题:在平面直角坐标系xOy中,点
,
,
,
.
(1)请在平面直角坐标系中画出四边形ABCD,并直接写出线段AB和线段CD的“近距离”和“远距离”;
(2)设直线
与x轴、y轴分别交于点E,F,若线段EF与四边形ABCD的“近距离”是1,求它们的“远距离”;
(3)在平面直角坐标系xOy中,有一个矩形GHMN,若此矩形至少有一个顶点在以点O为圆心,2为半径的圆上,其余各点可能在圆上或圆内将四边形ABCD绕着点O旋转一周,在旋转的过程中,它与矩形GHMN的“远距离”的最大值是____________;“近距离”的最小值是____________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1b4315630139326aff4ffc04c765d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982cf316c2d7fdf49a81b428ab38e9b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f6314d6f44c7d35b2b4b5cdc041d344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a4ba61e0fe0cb463581292835301f8.png)
(1)请在平面直角坐标系中画出四边形ABCD,并直接写出线段AB和线段CD的“近距离”和“远距离”;
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e614981a9b8dc6ddf2c23a96a6c4b42.png)
(3)在平面直角坐标系xOy中,有一个矩形GHMN,若此矩形至少有一个顶点在以点O为圆心,2为半径的圆上,其余各点可能在圆上或圆内将四边形ABCD绕着点O旋转一周,在旋转的过程中,它与矩形GHMN的“远距离”的最大值是____________;“近距离”的最小值是____________.
![](https://img.xkw.com/dksih/QBM/2021/6/11/2740715291672576/2743438628528128/STEM/c27b9626-07f7-4c83-83b4-6001ef7e262e.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】(2016吉林省)如图1,在平面直角坐标系中,点B在x轴正半轴上,OB的长度为2m,以OB为边向上作等边三角形AOB,抛物线l:
经过点O,A,B三点.
(1)当m=2时,a= ,当m=3时,a= ;
(2)根据(1)中的结果,猜想a与m的关系,并证明你的结论;
(3)如图2,在图1的基础上,作x轴的平行线交抛物线l于P、Q两点,PQ的长度为2n,当△APQ为等腰直角三角形时,a和n的关系式为 ;
(4)利用(2)(3)中的结论,求△AOB与△APQ的面积比.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
(1)当m=2时,a= ,当m=3时,a= ;
(2)根据(1)中的结果,猜想a与m的关系,并证明你的结论;
(3)如图2,在图1的基础上,作x轴的平行线交抛物线l于P、Q两点,PQ的长度为2n,当△APQ为等腰直角三角形时,a和n的关系式为 ;
(4)利用(2)(3)中的结论,求△AOB与△APQ的面积比.
![](https://img.xkw.com/dksih/QBM/2018/2/6/1876485688942592/1884800748183552/STEM/c3fd5fff003d4f119484b4cd8fdef295.png?resizew=355)
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解答题-问答题
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较难
(0.4)
【推荐2】如图1,抛物线
经过点
,
,矩形
的点A,D在x轴上,B,C在抛物线上,
.
(2)求点B,C的坐标;
(3)如图2,垂直于
的直线m从底边
出发,以每秒
的速度沿
方向匀速平移,分别交折线
,
,
于M,N,H,当直线m到达点E时,停止运动,连接
,
,设运动时间为t秒
,
的面积记为y,请用t表示y,写出t的相应的取值范围,并求y的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c1efead2102b6c50aa2a5bf3fec30a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22b83baa54a295f92b78615c44d18af7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81f653a8b62cb548e9603910f46bad51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f40622681bcdce18b8f06c81edfb47.png)
(2)求点B,C的坐标;
(3)如图2,垂直于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/048b61a5fb5f420c6d7de88db5bc3aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f83cc38461c65b390b473dfc4a51b9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee63cee3da04b106458d270fe935ece.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/577fb839669e9b32c0aa4b2a32335d34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】如图,顶点为
的抛物线
与
轴交于
,
两点(点
在点
的左侧),与
轴交于点
,直线
经过点
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/2f46af21-3a66-43fb-b37f-eb7ad5bffb0f.png?resizew=159)
(1)求抛物线的解析式;
(2)连接
,
,
.求证:
;
(3)点
为抛物线对称轴上的一个动点,点
是平面直角坐标系内一点,当以点
,
,
,
为顶点的四边形是菱形时,请直接写出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.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://staticzujuan.xkw.com/quesimg/Upload/formula/ae652daf6059ff386f99bef2210518c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/2f46af21-3a66-43fb-b37f-eb7ad5bffb0f.png?resizew=159)
(1)求抛物线的解析式;
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24654bd47ed4ef744121672dab091401.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
解答题-问答题
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较难
(0.4)
名校
解题方法
【推荐2】如图1,在平面直角坐标系中,抛物线
与
轴的一个交点为点
,与
轴的交点为点
,抛物线的对称轴
与
轴交于点
,与线段
交于点
,点
是对称轴
上一动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/9/381025a2-bee9-472d-b572-cd48f70cfe00.png?resizew=144)
(1)点
的坐标是________,点
的坐标是________;
(2)是否存在点
,使得
和
相似?若存在,请求出点
的坐标,若不存在,请说明理由;
(3)如图2,抛物线的对称轴
向右平移与线段
交于点
,与抛物线交于点
,当四边形
是平行四边形且周长最大时,求出点
的横坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92f1cc1b43cc52db5af9150b13ee38d4.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/9/381025a2-bee9-472d-b572-cd48f70cfe00.png?resizew=144)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0222d3ec99bc21b586b083bd9d67b225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33c2aa4cb5a3b8da3b188ab6a21520c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)如图2,抛物线的对称轴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/9/848d2de2-7695-48f8-91cd-0b4f491f3d60.png?resizew=146)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
解题方法
【推荐3】如图1,在平面直角坐标系xOy中,直线y=
x+2与x轴交于点A,与y轴交于点C,抛物线y=a
+bx+c的对称轴是直线x=﹣
且经过A,C两点,与x轴的另一交点为点B.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/6/0b865c08-7826-4117-8db7-2ba442336484.png?resizew=353)
(1)求抛物线解析式;
(2)在第四象限的抛物线上找一点M,过点M作MN垂直x轴于点N.若△AMN与△ABC相似,求点M的坐标;
(3)如图2,P为抛物线上一点,横坐标为p,直线EF交抛物线于E,F两点,其中∠EPF为直角,当p为定值时,直线EF过定点D,求随着p的值发生变化时,D点移动时形成的图像解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0a89e3c30f6e4d4c5db4378b05d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/6/0b865c08-7826-4117-8db7-2ba442336484.png?resizew=353)
(1)求抛物线解析式;
(2)在第四象限的抛物线上找一点M,过点M作MN垂直x轴于点N.若△AMN与△ABC相似,求点M的坐标;
(3)如图2,P为抛物线上一点,横坐标为p,直线EF交抛物线于E,F两点,其中∠EPF为直角,当p为定值时,直线EF过定点D,求随着p的值发生变化时,D点移动时形成的图像解析式.
您最近一年使用:0次