已知抛物线
经过
,并与x轴交于A、B两点,其中点B的坐标是
.
![](https://img.xkw.com/dksih/QBM/2022/4/30/2969383163650048/2969397493751808/STEM/635183d5-daa3-4c01-a86d-2946fcc2b9b7.png?resizew=181)
(1)求抛物线的函数解析式和点A的坐标;
(2)设点
都在抛物线
的图象上,若
,请证明:
;
(3)如图,点P是抛物线上一动点,当
的面积为5时,求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec32b9cfee142d1d4f68ab4771de77c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6554ac3dff4a59833e407db887f6e6.png)
![](https://img.xkw.com/dksih/QBM/2022/4/30/2969383163650048/2969397493751808/STEM/635183d5-daa3-4c01-a86d-2946fcc2b9b7.png?resizew=181)
(1)求抛物线的函数解析式和点A的坐标;
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9846608bd4e09137f96cf7f209935496.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/419504736c4934f6e0df4114c3743944.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e78e48123f7d225d25df8cae9ca371f4.png)
(3)如图,点P是抛物线上一动点,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
2022·云南·一模 查看更多[1]
(已下线)2022年云南省初中学业水平考试试题
更新时间:2022-04-30 17:17:34
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】如图,抛物线
交
轴于点
,交
轴于点
.
(1)求抛物线解析式;
(2)点
为
轴正半轴上一点,过点
作
轴于点
,交抛物线于点
,交直线
于点
;
①如图1,连接
,若
,求点
坐标;
②过点
作直线
轴,与抛物线交于
两点(点
在点
左侧),且
,直接写出点
横坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d57173ef4cd72eb270686875dfd623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd81cac5d2bcf0753819951088027d1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/30/106fe756-696e-48b1-89bb-c26517019814.png?resizew=408)
(1)求抛物线解析式;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/3d84acd3c96e20c0ce064aac125f7fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
①如图1,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec2a74cd3134a825d7924a01c8e633ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa3115a985b37d25d325836409c7766.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
②过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5125f17b4e2eab992b9a17dea1e86c5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f44755c5fee4b90266eac73ad47a128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2345c2bbe50b9941fae4ac0c4d4ab172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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,抛物线y=﹣x2+bx+c,与y轴交于点A,与x轴交于点E、B.且点A(0,5),B(5,0),点P为抛物线上的一动点.
![](https://img.xkw.com/dksih/QBM/2022/1/18/2896988947619840/2897239246888960/STEM/038675b3f11b46b3a26c6f81be2c7ab1.png?resizew=471)
(1)求二次函数的解析式;
(2)如图,过点A作AC平行于x轴,交抛物线于点C,若点P在AC的上方,作PD平行于y轴交AB于点D,连接PA,PC,当S四边形APCD=
时,求点P坐标;
(3)设抛物线的对称轴与AB交于点M,点Q在直线AB上,当以点M、E、P、Q为顶点的四边形为平行四边形时,请直接写出点Q的坐标.
![](https://img.xkw.com/dksih/QBM/2022/1/18/2896988947619840/2897239246888960/STEM/038675b3f11b46b3a26c6f81be2c7ab1.png?resizew=471)
(1)求二次函数的解析式;
(2)如图,过点A作AC平行于x轴,交抛物线于点C,若点P在AC的上方,作PD平行于y轴交AB于点D,连接PA,PC,当S四边形APCD=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cfac2281080c77eb5df715a2c13f9ea.png)
(3)设抛物线的对称轴与AB交于点M,点Q在直线AB上,当以点M、E、P、Q为顶点的四边形为平行四边形时,请直接写出点Q的坐标.
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】如图,抛物线
与
轴相交于
两点(点
在点
的左侧),与
轴相交于点
.抛物线上有一点
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/11/15c8de94-2d3b-402f-a5c1-205b2061ff56.jpg?resizew=196)
(1)求抛物线的解析式和顶点坐标.
(2)当点
位于
轴下方时,求
面积的最大值.
(3)①设此抛物线在点
与点
之间部分(含点
和点
)最高点与最低点的纵坐标之差为
.求
关于
的函数解析式,并写出自变量
的取值范围;
②当
时,点
的坐标是___________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50445bab1dfc3a2b98e8cce09ee95450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.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/ae140e4db2c5563e5f902fcbebaac262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82aaa597a5aa6176863eda3fdf83e181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/11/15c8de94-2d3b-402f-a5c1-205b2061ff56.jpg?resizew=196)
(1)求抛物线的解析式和顶点坐标.
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
(3)①设此抛物线在点
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f807358cf455601a19555b0fcc9a566.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2】如图,抛物线y=﹣x2+(m﹣1)x+m(其中m>1)与x轴交于A,B两点,与y轴交于点C,点D在该抛物线的对称轴上,且DA=DC.
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923363666649088/2926320386048000/STEM/f248d5f765084db19d636bfd399ab4e5.png?resizew=158)
(1)点A的坐标为 ,用含m的式子表示点D的坐标为 ;
(2)若△ACD与△BCO的面积之比为5:9,求该抛物线的表达式;
(3)在(2)的条件下,若动点P在该抛物线上,且当∠PBC=∠DAB时,求点P的坐标.
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923363666649088/2926320386048000/STEM/f248d5f765084db19d636bfd399ab4e5.png?resizew=158)
(1)点A的坐标为 ,用含m的式子表示点D的坐标为 ;
(2)若△ACD与△BCO的面积之比为5:9,求该抛物线的表达式;
(3)在(2)的条件下,若动点P在该抛物线上,且当∠PBC=∠DAB时,求点P的坐标.
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐3】如图①已知抛物线y=ax2﹣3ax﹣4a(a<0)的图象与x轴交于A、B两点(A在B的左侧),与y的正半轴交于点C,连结BC,二次函数的对称轴与x轴的交点为E.
(1)抛物线的对称轴与x轴的交点E坐标为_____,点A的坐标为_____;
(2)若以E为圆心的圆与y轴和直线BC都相切,试求出抛物线的解析式;
(3)在(2)的条件下,如图②Q(m,0)是x的正半轴上一点,过点Q作y轴的平行线,与直线BC交于点M,与抛物线交于点N,连结CN,将△CMN沿CN翻折,M的对应点为M′.在图②中探究:是否存在点Q,使得M′恰好落在y轴上?若存在,请求出Q的坐标;若不存在,请说明理由.
(1)抛物线的对称轴与x轴的交点E坐标为_____,点A的坐标为_____;
(2)若以E为圆心的圆与y轴和直线BC都相切,试求出抛物线的解析式;
(3)在(2)的条件下,如图②Q(m,0)是x的正半轴上一点,过点Q作y轴的平行线,与直线BC交于点M,与抛物线交于点N,连结CN,将△CMN沿CN翻折,M的对应点为M′.在图②中探究:是否存在点Q,使得M′恰好落在y轴上?若存在,请求出Q的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/8b427ff5-741a-4211-ae8e-de31ace10465.png?resizew=542)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
真题
名校
【推荐1】如图,抛物线y=ax2+bx﹣
经过点A(1,0)和点B(5,0),与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/2015/8/28/1573907720675328/1573907727147008/STEM/fe9db1e72b204eec93c6f994597ab914.png?resizew=180)
(1)求此抛物线的解析式;
(2)以点A为圆心,作与直线BC相切的⊙A,求⊙A的半径;
(3)在直线BC上方的抛物线上任取一点P,连接PB,PC,请问:△PBC的面积是否存在最大值?若存在,求出这个最大值的此时点P的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caa585b9257ed0798213a9ae9b87d291.png)
![](https://img.xkw.com/dksih/QBM/2015/8/28/1573907720675328/1573907727147008/STEM/fe9db1e72b204eec93c6f994597ab914.png?resizew=180)
(1)求此抛物线的解析式;
(2)以点A为圆心,作与直线BC相切的⊙A,求⊙A的半径;
(3)在直线BC上方的抛物线上任取一点P,连接PB,PC,请问:△PBC的面积是否存在最大值?若存在,求出这个最大值的此时点P的坐标;若不存在,请说明理由.
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
真题
名校
【推荐2】如图,二次函数
的图象与x轴的一个交点为
,另一个交点为A,且与y轴相交于C点
![](https://img.xkw.com/dksih/QBM/2018/8/22/2015510746513408/2017799821524992/STEM/a786549a6ab24af1a5d0f306e6c6bd46.png?resizew=142)
求m的值及C点坐标;
在直线BC上方的抛物线上是否存在一点M,使得它与B,C两点构成的三角形面积最大,若存在,求出此时M点坐标;若不存在,请简要说明理由
为抛物线上一点,它关于直线BC的对称点为Q
当四边形PBQC为菱形时,求点P的坐标;
点P的横坐标为
,当t为何值时,四边形PBQC的面积最大,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/357eb5129d16ac8457619a167d8f9cf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d552ee3c32a8976ff5767daaafac770c.png)
![](https://img.xkw.com/dksih/QBM/2018/8/22/2015510746513408/2017799821524992/STEM/a786549a6ab24af1a5d0f306e6c6bd46.png?resizew=142)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09c2b713cf852788d2840e39544bde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c512c047783c07da1d4f4455a4033ef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876959b9f90f2379cf3d0927a8e31005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9e2e51901d05f5bcfaa8800f6146958.png)
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
经过
两点,
两点的坐标分别为
.
![](https://img.xkw.com/dksih/QBM/2020/2/7/2394062952669184/2394379293360128/STEM/8721ab03293149559a2acf33436a8ce8.png?resizew=113)
(1)求抛物线的解析式;
(2)点
为抛物线的顶点,点
为抛物线与
轴的另一个交点,点
为
轴上一点,若
,求点
的坐标;
(3)在
轴下方,当
时,抛物线
随
的增大面增大,求出此时满足条件的整数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c611f50d16f97a2f21c3e48f62fc01aa.png)
![](https://img.xkw.com/dksih/QBM/2020/2/7/2394062952669184/2394379293360128/STEM/8721ab03293149559a2acf33436a8ce8.png?resizew=113)
(1)求抛物线的解析式;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d831c9ba6d18774540e2aaa29132fec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec55913a583cac90bf92414371c5aafe.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/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】在平面直角坐标系
中,抛物线
与x轴交于A、B两点(点A在点B左侧),与y轴交于点C,且
.
(2)如图,如果点D是抛物线的顶点,过点D作y轴的平行线,交
于点E,连接
,求
的面积;
(3)如果
、
在抛物线
上,我们将
称为P、Q两点的函数值的平均变化率,并记为
,即
.当
时,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f75941b4049736c119f94912317bdb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
(2)如图,如果点D是抛物线的顶点,过点D作y轴的平行线,交
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f2281cb6df0c3c518ce5ed19a02b57e.png)
(3)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a271c22e34d4df61636ab3052a8e0ecc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d265a9d87b531b4508d0fcc0f623674.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f75941b4049736c119f94912317bdb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e09cbd13cd2b44c419e612c70f1c1b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/604f56099f7b401a76363c4004f0b14c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ec75a38c657ce71443cc02f468ea0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/475c9073257b3d0760e2c6051a82d592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/604f56099f7b401a76363c4004f0b14c.png)
您最近一年使用:0次