如图,抛物线
经过点
.抛物线与
轴的交点为
,顶点为
.
(1)求抛物线的解析式;
(2)求抛物线的顶点坐标与对称轴;
(3)点
是抛物线上的动点,且在第一象限内.
①点
关于
轴的对称点为
,顶点
关于直线
的对称点为
,求点
到
轴的距离与
相等时,点
的坐标.
②以点
为旋转中心,将点
绕点
逆时针旋转
得到点
,当点
在抛物线的对称轴上时,直接写出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca97516f9b88fcba781529e7b8823e4e.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/24/3bdd351f-6079-4a83-95e6-625e1a17725c.png?resizew=121)
(1)求抛物线的解析式;
(2)求抛物线的顶点坐标与对称轴;
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
①点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
②以点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a0387fc1258f31e44a10068c0ccfd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
2023·吉林松原·二模 查看更多[2]
更新时间:2023-07-28 16:35:00
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相似题推荐
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【推荐1】如图,在平面直角坐标系中,二次函数的图像与x轴交于A、B两点,与y轴交于点C,点A的坐标为
,点B的坐标为
.
(1)求此二次函数的解析式;
(2)动点D从点C出发,以每秒
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4807ca16360c0cca436e59d4be98f626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
(3)点D在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐2】已知抛物线
与x轴交于
、
两点,与y轴交于点
.
(2)点P为直线
下方的抛物线上一个动点,当
面积最大时,求点P的坐标;
(3)点P在直线
下方的抛物线上,连接
交
于点M,当
最大时,求点P的横坐标及
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913f78382630e50543e5f7192cae3ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fbdef5d0c05acbf63fa72fa85c5bb45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae140e4db2c5563e5f902fcbebaac262.png)
(2)点P为直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
(3)点P在直线
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29a6ce188523ed6ab24fa2bfa6e17fdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29a6ce188523ed6ab24fa2bfa6e17fdb.png)
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【推荐1】已知抛物线
和直线
,且
.
(1)求抛物线的顶点坐标;
(2)试说明抛物线与直线有两个交点;
(3)已知点
,且
,过点
作
轴的垂线,与抛物线交于点
,与直线交于点
,当
时,求线段
长的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9133ad54107d6d91ab820356ef11b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d23c28b31c6728083acb48a0a246990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/060e7930731eddbcfac592b808e9b698.png)
(1)求抛物线的顶点坐标;
(2)试说明抛物线与直线有两个交点;
(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65d0933bd6753908c00e40bb61c1e9c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/872c3be2b4093ce053d01ee7a521bb07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e92b8c0db2bd05d57bfe6118687f4bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
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【推荐2】已知二次函数
(m为常数)
(1)当m=2时
①求函数顶点坐标,并写出函数值y随x的增大而减小时x的取值范围.
②若点
和
在其图象上,且
时,则实数t的取值范围是 .
(2)记二次函数
的图象为G.
①当图象G上有且只有两个点到x轴的距离为2时,求m的取值范围.
②已知矩形ABCD的对称中心为(0,1),点A的坐标为(-3,3).记图象G在矩形ABCD内部(包含边界)的最高点P的纵坐标为p,最低点的纵坐标为q,当p-q=4时,直接写出m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24db845e50c7670a1c71fe237f23ae8d.png)
(1)当m=2时
①求函数顶点坐标,并写出函数值y随x的增大而减小时x的取值范围.
②若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1d4bd7c327529b37bc29c4676513ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3f816d0acbc28c78e3cea99cbcc71cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b70ee3d659e20fa52f67cf9d2e3484f0.png)
(2)记二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64718140d515318f24968f73d5fb6db5.png)
①当图象G上有且只有两个点到x轴的距离为2时,求m的取值范围.
②已知矩形ABCD的对称中心为(0,1),点A的坐标为(-3,3).记图象G在矩形ABCD内部(包含边界)的最高点P的纵坐标为p,最低点的纵坐标为q,当p-q=4时,直接写出m的取值范围.
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【推荐1】下表中给出了变量x,与y=ax2,y=ax2+bx+c之间的部分对应值,(表格中的符号“…”表示该项数据已丢失)
(1)求抛物线y=ax2+bx+c的表达式
(2)抛物线y=ax2+bx+c的顶点为D,与y轴的交点为A,点M是抛物线对称轴上一点,直线AM交对称轴右侧的抛物线于点B,当△ADM与△BDM的面积比为2:3时,求B点坐标;
(3)在(2)的条件下,设线段BD与x轴交于点C,试写出∠BAD和∠DCO的数量关系,并说明理由.![](https://img.xkw.com/dksih/QBM/2018/11/13/2074717075636224/2075210881990657/STEM/68ad33740de24c8a81c4bd04688e6904.png?resizew=5)
x | ﹣1 | 0 | 1 |
ax2 | … | … | 1 |
ax2+bx+c | 7 | 2 | … |
(2)抛物线y=ax2+bx+c的顶点为D,与y轴的交点为A,点M是抛物线对称轴上一点,直线AM交对称轴右侧的抛物线于点B,当△ADM与△BDM的面积比为2:3时,求B点坐标;
(3)在(2)的条件下,设线段BD与x轴交于点C,试写出∠BAD和∠DCO的数量关系,并说明理由.
![](https://img.xkw.com/dksih/QBM/2018/11/13/2074717075636224/2075210881990657/STEM/68ad33740de24c8a81c4bd04688e6904.png?resizew=5)
![](https://img.xkw.com/dksih/QBM/2018/11/13/2074717075636224/2075210881990657/STEM/3484cd633144401c825fda8338ec791d.png?resizew=222)
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解题方法
【推荐2】如图,抛物线y=
交x轴于A,B两点(A在B的左侧),其中B(2
,0),与y轴交于点C(0,﹣4).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/7260a555-f330-406d-9055-2153d7ebdbb5.png?resizew=198)
(1)求抛物线的解析式;
(2)直线BD与y轴交于点D,且∠ABD=30°,点M是抛物线上在第三象限的一动点,过M作MP
y轴,交直线BD于点P,MQ⊥BD于点Q,求
MQ+PQ的最大值及此时M点的坐标;
(3)将抛物线沿射线DB方向平移4个单位得到新抛物线y1,新抛物线y1与原抛物线交于点E,在新抛物线y1的对称轴上确定一点F,使得△BEF是以BE为腰的等腰三角形,请直接写出所有符合条件的点F的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33da2ff6dcd741806a92aa851faf0d86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef812f839622326a7d7027cc806aaeb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/7260a555-f330-406d-9055-2153d7ebdbb5.png?resizew=198)
(1)求抛物线的解析式;
(2)直线BD与y轴交于点D,且∠ABD=30°,点M是抛物线上在第三象限的一动点,过M作MP
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef812f839622326a7d7027cc806aaeb.png)
(3)将抛物线沿射线DB方向平移4个单位得到新抛物线y1,新抛物线y1与原抛物线交于点E,在新抛物线y1的对称轴上确定一点F,使得△BEF是以BE为腰的等腰三角形,请直接写出所有符合条件的点F的坐标.
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【推荐1】如图1,
是边长为4
的等边三角形,边
在直线
上,点
是直线
上一动点,当点
不与点
重合时,将
绕点
逆时针旋转
得到
,连接
.
(1)求证:
是等边三角形;
(2)当点
在直线
上运动时,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c90bb8915f697722e0aef340f39fbf4.png)
,求
的长
(3)如图2,当点
在射线
上运动时,点
是
的中点,问
是否存在最小值,若存在,求出最小值,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/2023/11/16/3369206402105344/3374272746725376/STEM/12840ae4f1b64ab2a2c6eec6f2305d67.png?resizew=554)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c90bb8915f697722e0aef340f39fbf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(3)如图2,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/393aecc2fca4218b20b5ca786d272310.png)
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【推荐2】直线
的解析式为
,点
在
轴上,直线
上一动点
的横坐标是
,将
绕点
旋转使
落在
轴上的点
处,连接
.
![](https://img.xkw.com/dksih/QBM/2023/1/6/3147039277555712/3148272780763136/STEM/9e977893f0614e82a731f2e53b99447a.png?resizew=171)
(1)当
时,点
的坐标____________
(2)判断
的形状为____________
(3)当
时,
在第二象限内被
与
两条直线所夹部分的面积记为
,用含
的式子来表示
,并直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6ed67cff3efcf4d12bbe1a0fc340b59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/411461db15ee8086332c531e086c40c7.png)
![](https://img.xkw.com/dksih/QBM/2023/1/6/3147039277555712/3148272780763136/STEM/9e977893f0614e82a731f2e53b99447a.png?resizew=171)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d0469336f71edd52dc9148c67db052.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65d1eec645764636c0e23b05e8f93234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d0469336f71edd52dc9148c67db052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6ed67cff3efcf4d12bbe1a0fc340b59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f3b4416a186069ad6dbe9d9c1ed76e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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