如图,已知抛物线
与
轴交于点
,对称轴为
,直线
(
)分别交抛物线于点
,
(点
在点
的左边),直线
分别交
轴、
轴于点
,
,交抛物线
轴右侧部分于点
,交
于点
,且
.
![](https://img.xkw.com/dksih/QBM/2022/6/13/3000458188931072/3001080975548416/STEM/e729651ae2534afd9f05e29b0e92fcee.png?resizew=190)
(1)求抛物线及直线
的函数表达式;
(2)若
为直线
下方抛物线上的一个动点,连接
,
,求当
面积最大时,点
的坐标及
面积的最大值;
(3)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d8bf01092d97f3c2d199f25bda462b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5558ffa6dc28d437c0467c7f361d444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac02a054bd0771a56987af33454baaea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.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/89c1972246a0a3d1c987d25205dbdd99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/622a7aca2bc5b3c995290f72d465da76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f660de9a0df3283b166d9489811451.png)
![](https://img.xkw.com/dksih/QBM/2022/6/13/3000458188931072/3001080975548416/STEM/e729651ae2534afd9f05e29b0e92fcee.png?resizew=190)
(1)求抛物线及直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce8f887360a533f0a25b0b34fb11f0a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4374a1fe450cee76a3aaa0d2231bb73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4374a1fe450cee76a3aaa0d2231bb73.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ade9554594af04f79ddca2b4e98fa68.png)
2022·黑龙江大庆·三模 查看更多[2]
更新时间:2022-06-14 11:37:47
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【推荐1】关于x的一元二次方程x2﹣(m﹣3)x﹣m2=0.
(1)证明:方程总有两个不相等的实数根;
(2)设这个方程的两个实数根为x1,x2,且|x1|=|x2|﹣2,求m的值及方程的根.
(1)证明:方程总有两个不相等的实数根;
(2)设这个方程的两个实数根为x1,x2,且|x1|=|x2|﹣2,求m的值及方程的根.
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【推荐2】已知抛物线y=ax2+bx-3经过(-1,0),(3,0)两点,与y轴交于点C,直线y=kx与抛物线交于A,B两点.
(1)写出点C的坐标并求出此抛物线的解析式;
(2)当原点O为线段AB的中点时,求k的值及A,B两点的坐标;
(3)是否存在实数k使得△ABC的面积为
?若存在,求出k的值;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2016/8/3/1574222674665472/1574222680735744/STEM/bdf1e8ee-d3ff-4b76-91e1-f62bd3119a42.png?resizew=165)
(1)写出点C的坐标并求出此抛物线的解析式;
(2)当原点O为线段AB的中点时,求k的值及A,B两点的坐标;
(3)是否存在实数k使得△ABC的面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa0a320f380eb8a12f5d2af971e51611.png)
![](https://img.xkw.com/dksih/QBM/2016/8/3/1574222674665472/1574222680735744/STEM/bdf1e8ee-d3ff-4b76-91e1-f62bd3119a42.png?resizew=165)
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【推荐1】已知抛物线
与
轴相交于
,
两点,与
轴交于点
.若点
为
轴上的动点,过点
作
轴的垂线交抛物线于点
.
(1)直接写出
,
,
三点的坐标;
(2)①如图1,直线
交直线
于点
,若点
恰好在线段
的垂直平分线上,且
时,求
的值;
②如图2,连接
,
,抛物线上存在一点
,使得以
,
,
为顶点的三角形与
相似,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/353b27715b12c8020985cee29deffdbc.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/883f23ab75b490d6e9e03b8ff8b269c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/13/0a907aa8-cf5e-4750-8494-04ca0d32b807.png?resizew=362)
(1)直接写出
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
(2)①如图1,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acf0d66e57ecc32eed2d70c834454552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
②如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd1bad8deaf97f200d797c5fda7f89e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐2】如图,在平面直角坐标系中,已知二次函数
图象经过
两点.
![](https://img.xkw.com/dksih/QBM/2021/5/13/2720191862669312/2736446596096000/STEM/d8e03f28-2fce-4e62-b47c-f805089c0ff4.png)
(1)求b,c的值.
(2)连结
,
,若P是第一象限内抛物线上一点,直线
把
的面积分成相等的两部分.
①求直线
的解析式.
②将该抛物线沿着射线
的方向平移m个单位,使其顶点落在
的内部(不包括边界),求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a760736669e5fdf80800fbce8b733cf.png)
![](https://img.xkw.com/dksih/QBM/2021/5/13/2720191862669312/2736446596096000/STEM/d8e03f28-2fce-4e62-b47c-f805089c0ff4.png)
(1)求b,c的值.
(2)连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
①求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
②将该抛物线沿着射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
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【推荐1】如图,抛物线
与
轴分别相交于
,
两点(点
在点
的左侧),
是
的中点,平行四边形
的顶点
,
均在抛物线上.
(1)直接写出点
的坐标;
(2)如图(1),若点
的横坐标是
,点
在第二象限,平行四边形
的面积是13,
①求直线
的解析式;
②求点
的坐标;
(3)如图(2),若点
在抛物线上,连接
,求证:直线
过一定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/682c90df1732eb1757b96cddb450f9d3.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/30/9c75138a-1f93-4fae-8e7a-0daeb9066930.png?resizew=292)
(1)直接写出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)如图(1),若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
①求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
②求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(3)如图(2),若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
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【推荐2】如图, 在平面直角坐标系中,点A,B分别是
轴正半轴,
轴正半轴上两动点,
,
,以AO,BO为邻边构造矩形AOBC,抛物线
交
轴于点D,P为顶点,PM⊥
轴于点M.
(1)求
,
的长(结果均用含
的代数式表示).
(2)当
时,求该抛物线的表达式.
(3)在点
在整个运动过程中.
①若存在
是等腰三角形,请求出所有满足条件的
的值.
②当点A关于直线DP的对称点
恰好落在抛物线
的图像上时,请直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be7a332404aa03c74725edd2c53f30cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6f5797edab2d8c194650a7187f8376.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/529fb44d01db133c23de6b36669f6643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bab6039809a0defa8d71ff388a582b7.png)
(3)在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
①若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a93081467096efb97230c0bb1ad7c21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
②当点A关于直线DP的对称点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/529fb44d01db133c23de6b36669f6643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/29/aac0c6cf-f7c9-412b-938e-fad23754b982.png?resizew=193)
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【推荐1】如图1,抛物线
的顶点坐标为
,与y轴交于点C,与x轴交于点A和点B.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/19/4bdcacfe-c6f9-4117-bae5-20364ffba80f.png?resizew=332)
(1)求抛物线的解析式.
(2)若M为y轴上一点,当
的值最小时,求点M的坐标.
(3)如图2,若P是第一象限内抛物线上的一个动点,求
的面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c9800e4b992044d16681e77ff6563c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1be0bd5857ad1888ad708a3ce7437d8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/19/4bdcacfe-c6f9-4117-bae5-20364ffba80f.png?resizew=332)
(1)求抛物线的解析式.
(2)若M为y轴上一点,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f901924d7648980eb746fee8779e73a.png)
(3)如图2,若P是第一象限内抛物线上的一个动点,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4234cf4d8159f5df0333bcc269ffe099.png)
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(0.4)
【推荐2】如图,抛物线y=x2+bx﹣1与x轴交于点A,B(点A在点B的左侧),交y轴于点C,顶点为D,对称轴为直线x=﹣
,连接AC,BC.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/9/24d4fcc5-dd48-493f-a90d-52b2c5e86c29.png?resizew=205)
(1)求抛物线的解析式;
(2)求△ABC的面积;
(3)在抛物线的对称轴上是否存在点E,使得△CDE为等腰三角形?如果存在,请直接写出点E的坐标,如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/9/24d4fcc5-dd48-493f-a90d-52b2c5e86c29.png?resizew=205)
(1)求抛物线的解析式;
(2)求△ABC的面积;
(3)在抛物线的对称轴上是否存在点E,使得△CDE为等腰三角形?如果存在,请直接写出点E的坐标,如果不存在,请说明理由.
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