已知抛物线
与x轴交于点A、B两点(A点在B点左侧),与y轴交于点C(0,-3),对称轴是直线x=1,直线BC与抛物线的对称轴交于点D.
(1)求出抛物线的函数表达式;
(2)设点E时抛物线上一点,且S△ABE=
S△ABC,求tan∠ECO的值;
(3)点P在抛物线上,点Q在抛物线对称轴上,若以B、C、P、Q为顶点的四边形是平行四边形,求点P坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
(1)求出抛物线的函数表达式;
(2)设点E时抛物线上一点,且S△ABE=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caa585b9257ed0798213a9ae9b87d291.png)
(3)点P在抛物线上,点Q在抛物线对称轴上,若以B、C、P、Q为顶点的四边形是平行四边形,求点P坐标.
![](https://img.xkw.com/dksih/QBM/2019/6/13/2224653698768896/2225331315236864/STEM/9ed0deaa5cde4ef784e9ea254f1e7088.png?resizew=331)
更新时间:2019-06-14 11:11:03
|
相似题推荐
解答题-计算题
|
较难
(0.4)
【推荐1】如图1,在平面直角坐标系中,已知
,且a,b满足
.
(1)求A,B两点的坐标;
(2)如图2,连接
,若
,
于点E,点C与点B关于y轴对称,点M是线段
上的一点,且
,连接
,求证:
;
(3)如图3,在(2)的条件下,若点N是线段
上的一个点,点P是
延长线上的一点,且
,连接
交y轴于点Q,过点N作
轴于点H,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b967fa4c775be88b7386c6e2289e41b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25d75c32ffdb38ca51d38d668bd70db1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/b8c741d9-be73-459c-b12d-327fa5e1ad65.png?resizew=510)
(1)求A,B两点的坐标;
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c61d9ab4d12f739bb57d5abb6e8da091.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/556b054d226a8a6c53022ff03a99a0c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f905b4f0c32ce1d6ba4f99494efe72de.png)
(3)如图3,在(2)的条件下,若点N是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/804ccdcbf65b3b8de3bf6dda662c5b85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e57c21ad0356e7e6b179c5aa4aac739b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0976b9cf921a311fd83c2a895fcbab9d.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图,在平面直角坐标系中,点
,点
为正方形
的两个顶点,点
和
在第一象限.
(1)求点
的坐标;
(2)求直线
的函数表达式;
(3)在直线
上是否存在点
,使
为等腰三角形?若存在,请直接写出点
的坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c84818cfbd9a885081cb4e3294eabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/16/25d6ee52-a657-4a15-8fc8-8029d3df5d7b.png?resizew=139)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.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
|
较难
(0.4)
【推荐1】在平面直角坐标系中,已知抛物线
经过
两点.P是抛物线上一点,且在直线
的上方.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/10/98364d40-212b-4ad6-a42a-e4e6d77207ba.png?resizew=189)
(1)求抛物线的表达式;
(2)若
面积是
面积的
倍,求点
的坐标;
(3)如图,
交
于点
,
交
于点D.记
,
的面积分别为
,判断
是否存在最大值.若存在,求出最大值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53be61cd85ec86aabd164cae0265246b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9bba103baef3bf9eb6b3655d3ef601a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/10/98364d40-212b-4ad6-a42a-e4e6d77207ba.png?resizew=189)
(1)求抛物线的表达式;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.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/2e83c25d098876cfc55d2cbf39858367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31039dbbbcad3eaa3c85a3ddfeca2b3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff36ac07c45c8d03cf3b7d8739c517ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76b982b4ed3b75609bda6af3914986d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图,抛物线
过点
,
,D为抛物线的顶点.
(1)求抛物线的解析式以及顶点坐标;
(2)点C关于抛物线
对称轴的对称点为E点,连接BC,BE,求
的正切值;
(3)在(2)的条件下,点M是抛物线对称轴上且在CE上方的一点,是否存在点M使
和
相似?若存在,求点M坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8794fdd5b979fa369ac350d063f631d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae140e4db2c5563e5f902fcbebaac262.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/17/58687bfd-2e07-4e02-8177-11d26b029a64.png?resizew=142)
(1)求抛物线的解析式以及顶点坐标;
(2)点C关于抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8794fdd5b979fa369ac350d063f631d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d29e7c4d6216690152430b09f9cf0c2.png)
(3)在(2)的条件下,点M是抛物线对称轴上且在CE上方的一点,是否存在点M使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cce3ac38fff90d90bce109cca298fc93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
真题
【推荐1】在平面直角坐标系xOy中,抛物线
过B(﹣2,6),C(2,2)两点.
![](https://img.xkw.com/dksih/QBM/2016/6/29/1574214551511040/1574214557966336/STEM/c7b40a98-e355-4339-b543-9c19a7d60901.png?resizew=264)
(1)试求抛物线的解析式;
(2)记抛物线顶点为D,求△BCD的面积;
(3)若直线
向上平移b个单位所得的直线与抛物线段BDC(包括端点B、C)部分有两个交点,求b的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0d44326c214c7a5ecc3068a29ec96f.png)
![](https://img.xkw.com/dksih/QBM/2016/6/29/1574214551511040/1574214557966336/STEM/c7b40a98-e355-4339-b543-9c19a7d60901.png?resizew=264)
(1)试求抛物线的解析式;
(2)记抛物线顶点为D,求△BCD的面积;
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891b79720dc6ae64a00aeec07d7b0e5f.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐2】如图,正方形
的四个顶点分别在四条平行线
上,这四条直线中相邻两条之间的距离依次为
.
;
(2)设正方形
的面积为
,求证:
;
(3)若
,当
变化时,说明正方形
的面积为
随
的变化情况.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1742c3f6d1fc79ce792a1b6bb59d3af8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8037e7acacb9faab7120b8383685475e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d248da74313f998743a3ce8db4c33316.png)
(2)设正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/decdae2b2e8a1dc72736c0afca3b2fec.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/127e01f99047fac57e8d0f34a55ab9f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80b53eab97158937f92039c1e133b0f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80b53eab97158937f92039c1e133b0f1.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐3】如图,在△ABC中,∠B=45°,BC=5,高AD=4,矩形EFPQ的一边QP在BC边上,E、F分别在AB、AC上,AD交EF于点H.
(1)当矩形EFPQ为正方形时,求正方形的边长;
(2)设EF=x,当x为何值时,矩形EFPQ的面积最大?并求出最大面积;
(3)当矩形EFPQ的面积最大时,该矩形EFPQ以每秒1个单位的速度沿射线BC匀速向右运动(当矩形的顶点Q到达C点时停止运动),设运动时间为t秒,矩形EFPQ与△ABC重叠部分的面积为S,求S与t的函数关系式,并写出t的取值范围.
(1)当矩形EFPQ为正方形时,求正方形的边长;
(2)设EF=x,当x为何值时,矩形EFPQ的面积最大?并求出最大面积;
(3)当矩形EFPQ的面积最大时,该矩形EFPQ以每秒1个单位的速度沿射线BC匀速向右运动(当矩形的顶点Q到达C点时停止运动),设运动时间为t秒,矩形EFPQ与△ABC重叠部分的面积为S,求S与t的函数关系式,并写出t的取值范围.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/c92557d9-0b66-4140-b00b-35ca615d1c52.png?resizew=156)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】如图,已知抛物线y=x2+bx+c与x轴交于A、B两点(A点在B点左侧),与y轴交于点C(0,﹣3),对称轴是直线x=1,直线BC与抛物线的对称轴交于点D.
![](https://img.xkw.com/dksih/QBM/2022/3/8/2932059267514368/2961595351343104/STEM/c3f4ef0b-a980-4fd2-8907-a9fc623f1a05.png?resizew=172)
(1)求抛物线的函数表达式;
(2)点E为y轴上一动点.
①若CE的垂直平分线交CE于点F,交抛物线于P、Q两点,且点P在第三象限,当线段PQ=
AB时,求∠CED的正切值;
②若点G是直线x=1上一点,当△CEG与△AOC相似时,请直接写出点E的坐标.
![](https://img.xkw.com/dksih/QBM/2022/3/8/2932059267514368/2961595351343104/STEM/c3f4ef0b-a980-4fd2-8907-a9fc623f1a05.png?resizew=172)
(1)求抛物线的函数表达式;
(2)点E为y轴上一动点.
①若CE的垂直平分线交CE于点F,交抛物线于P、Q两点,且点P在第三象限,当线段PQ=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
②若点G是直线x=1上一点,当△CEG与△AOC相似时,请直接写出点E的坐标.
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图1,在正方形
中,
,点
在边
上,且
,以点
为圆心,
为半径在其左侧作半圆
,分别交
)于点
,交
的延长线于点
.
(1)
;
(2)如图2,将半圆
绕点
逆时针旋转
,点
的对应点为
,点
的对应点为
;设
为半圆
上一点.
①当点
落在
边上时,求点
与线段
之间的最短距离;
②当半圆
交
于
两点时,若
的长为
,求此时半圆
与正方形
重叠部分的面积;
③当半圆
与正方形
的边相切时,设切点为
,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e7f10e0c8af2d0d02a685f6f19e329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd60303c0a793a28edf57595706678f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/8/ae51bd1e-5e5b-4f51-82d5-9b2baa567548.jpg?resizew=235)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26c69a9feb14d4b9ccba6ae42837fd73.png)
(2)如图2,将半圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb0c6b3ac303e83e204a619ac3d5e1bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efef9b7dcc3f2c27c47bb97ed54d72d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
①当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e55590555905eb4f57889bbd16e39a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
②当半圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40feeff9bafbd164cadee1fa7502371a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d1bf4ac9c53a3408b81744ea2cc31f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f2daf8c9ca3b4a1695c4f47c1bf6c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
③当半圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167da16a6ab0f0c661e622be93189109.png)
您最近一年使用:0次