如图,抛物线
与
轴分别交于点
,
,与
轴交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/811c30c1-728a-4985-8c5a-272e353fa000.png?resizew=184)
(1)求抛物线的解析式;
(2)设点
在第一象限的抛物线上,连接
,
.试问,在对称轴左侧的抛物线是否存在一点
,满足
?如果存在,请求出点
的坐标:如果不存在,请明理由;
(3)存在正实数
,
(
),当
时,恰好满足
,求
,
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16403fc9b29d6d8e814318ee24a9dc05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311497849126f1aaf1da0ec75602eabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d03fa28c117649b0fdfe17eed7b583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/811c30c1-728a-4985-8c5a-272e353fa000.png?resizew=184)
(1)求抛物线的解析式;
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f451ad62e8d5a1780039139fad51da57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a458aa4e438a9b1e6cd54827c30ce76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)存在正实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb7961cbe98aac6a5fdee94582c341b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39c883d61ef6f0c7642f1fd883ae4674.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf427883fa388afd99ad90a4d4d7ce97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
2020·天津河东·一模 查看更多[4]
2020年天津市河东区九年级一模数学试题湖南省长沙市师大附中博才实验中学2021年九年级中考数学模拟试卷(二模)(已下线)专题2.44 二次函数压轴题-角度问题(专项练习)-2021-2022学年九年级数学下册基础知识专项讲练(北师大版)黑龙江省大庆市庆新中学2021-2022学年九年级(五四制)下学期第四次月考数学试题
更新时间:2020-06-23 09:04:19
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相似题推荐
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名校
【推荐1】如图,抛物线
交
轴于点
、
(点
在点
的左侧),与
轴交于点
,点
、
的坐标分别为(-3,0),(0,3),对称轴
交
轴于
,点
为抛物线顶点.
(1)求抛物线的解析式.
(2)点
是直线
下方的抛物线上一点,且
.求
的坐标.
(3)
为抛物线对称轴上一点,是否存在以
、
、
为顶点的
是等腰三角形,若存在,直接写出点
的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(1)求抛物线的解析式.
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cef550181bf53e69e44d83c91340de9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45504031c84b187f9c6324622415ea22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/2020/9/28/2566465861181440/2609796796579840/STEM/4a1fdb98-58b1-400e-9904-8b548633f2ff.png)
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【推荐2】如图,抛物线
:
与
轴交于
两点,与
轴交于点
.
(1)直接写出抛物线
的解析式;
(2)如图,有一宽度为
的直尺平行于
轴,直尺两长边被线段
和抛物线
截得两线段
、
.设点
的横坐标为
,且
,当
为何值时四边形
为平行四边形;
(3)在(2)的条件下连
、
,当直尺平行移动时,
与
能否相等,若能求出
的值,若不能请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](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/e54a8be30027913cafd270835828f2ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/8/8b3131de-f7a4-4908-8af7-1c47bf7bd025.png?resizew=469)
(1)直接写出抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)如图,有一宽度为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87448e09eaa816e50ae92d111d5ded6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eb4337e61fdb8a9e216273edab4579c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48cc00412f1076a27ef5268ba840896b.png)
(3)在(2)的条件下连
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7feef9ddfcd5215dcf3c2f28fc497ba4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd5e66e7d6f41ac4d8c861392e8bd06f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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真题
【推荐1】在平面直角坐标系中,抛物线
(m为常数)的顶点为A.
(1)当
时,点A的坐标是 ,抛物线与y轴交点的坐标是 .
(2)若点A在第一象限,且
,求此抛物线所对应的二次函数的表达式,并写出函数值y随x的增大而减小时x的取值范围.
(3)当
时,若函数
的最小值为3,求m的值.
(4)分别过点
、
作y轴的垂线,交抛物线的对称轴于点M、N.当抛物线
与四边形PQNM的边有两个交点时,将这两个交点分别记为点B、点C,且点B的纵坐标大于点C的纵坐标.若点B到y轴的距离与点C到x轴的距离相等,直接写出m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde4e708a42e5da11dbfc88b66d4d5c1.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8493a0cd10d3d0399173c04163740a38.png)
(2)若点A在第一象限,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d7ec20141db31e48d830a254370ad7.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a19d18f5b828cf554f352ec2a3434fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde4e708a42e5da11dbfc88b66d4d5c1.png)
(4)分别过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a08092ea1dbc65fe683842acbdde8ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15599cad865da2ae05114f9663c9f86a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde4e708a42e5da11dbfc88b66d4d5c1.png)
![](https://img.xkw.com/dksih/QBM/2021/6/28/2752717642014720/2752875656642560/STEM/469b6dd7-3b82-4f76-ae78-0bae5e3f35e7.png)
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【推荐2】抛物线
与x轴交于A、B两点(点A在点B的左侧)点C为顶点,以点C为旋转中心,将点B顺时针旋转90°得到点D.
(1)直接写出点C的坐标为______.(用含a的式子表示)
(2)试说明点A为位置不变的定点,并求出点A的坐标.
(3)当
时,求点D的坐标.
(4)当点D在第三象限时,直接写出a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87096abf0b1b1a001590c662d4229d94.png)
(1)直接写出点C的坐标为______.(用含a的式子表示)
(2)试说明点A为位置不变的定点,并求出点A的坐标.
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb01d2b57580731c8b807ac8cffc8ba.png)
(4)当点D在第三象限时,直接写出a的取值范围.
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【推荐1】如图,在锐角
中,
,点
,
分别是边
,
上一动点,连接
交直线
于点
.
,且
,
,求
的度数;
(2)如图2,若
,且
,在平面内将线段
绕点
顺时针方向旋转
得到线段
,连接
,点
是
的中点,连接
.在点
,
运动过程中,猜想线段
,
,
之间存在的数量关系,并证明你的猜想;
(3)若
,且
,将
沿直线
翻折至
所在平面内得到
,点
是
的中点,点
是线段
上一点,将
沿直线
翻折至
所在平面内得到
,连接
.在点
,
运动过程中,当线段
取得最小值,且
时,请直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb980da8e86b4cfd322616dc84fc6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421291381be28da4bd16560fd383b4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/523edc03512659a0521ab1dc6debc196.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7724af2445c723d1392aed54d210ed3a.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eac6f98ed81727dc5f6699ea5117fff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.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/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eac6f98ed81727dc5f6699ea5117fff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98230581ab1b2476e48491a6b00f848c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c8034aef9ecb15c709331282b96eeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98230581ab1b2476e48491a6b00f848c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5736f17b804e2839cee6d78efc9b5d32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.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/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/317ec07ba18b531b688c47ea805ea59f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e38c28290d9300ea6771e5ec84fdd979.png)
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【推荐2】如图,正方形ABCD是一次函数y=x+1图象的其中一个伴侣正方形.
(1)若某函数是一次函数y=x+1,求它的图象的所有伴侣正方形的边长;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/5/91748815-6b2b-49f7-8833-961191b56885.png?resizew=172)
(2)若某函数是反比例函数
,它的图象的伴侣正方形为ABCD,点D(2,m)(m<2)在反比例函数图象上,求m的值及反比例函数解析式;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/5/b2eb3ff9-b300-4d13-b948-cff628d64bde.png?resizew=172)
(3)若某函数是二次函数y=ax2+c(a≠0),它的图象的伴侣正方形为ABCD,C、D中的一个点坐标为(3,4).写出伴侣正方形在抛物线上的另一个顶点坐标,写出符合题意的其中一条抛物线解析式,并判断你写出的抛物线的伴侣正方形的个数是奇数还是偶数?.(本小题只需直接写出答案)
(1)若某函数是一次函数y=x+1,求它的图象的所有伴侣正方形的边长;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/5/91748815-6b2b-49f7-8833-961191b56885.png?resizew=172)
(2)若某函数是反比例函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b0b612460326448de36e160c8d29af9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/5/b2eb3ff9-b300-4d13-b948-cff628d64bde.png?resizew=172)
(3)若某函数是二次函数y=ax2+c(a≠0),它的图象的伴侣正方形为ABCD,C、D中的一个点坐标为(3,4).写出伴侣正方形在抛物线上的另一个顶点坐标,写出符合题意的其中一条抛物线解析式,并判断你写出的抛物线的伴侣正方形的个数是奇数还是偶数?.(本小题只需直接写出答案)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/5/cb24fdbb-d91f-415b-a8d9-5add4ecab44d.png?resizew=173)
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解题方法
【推荐1】综合与探究
如图,抛物线
经过点
,
,与
轴交于另一点
(点
在点
的右侧),点
是第四象限内抛物线上的动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/6afd286f-a186-445d-9539-35a2caf4b09d.png?resizew=111)
(1)求抛物线的函数解析式及点
的坐标;
(2)若
的面积为
,请直接写出
关于
的函数关系表达式,并求出当
的值为多少时,
的值最大?最大值为多少?
(3)是否存在点
,使得
?若存在,求出点
的坐标;若不存在,请说明理由.
如图,抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a50a15e67fdb7a31db934cf11341894b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c84818cfbd9a885081cb4e3294eabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55d12701014cf53071093e8739d089b.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82aaa597a5aa6176863eda3fdf83e181.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/6afd286f-a186-445d-9539-35a2caf4b09d.png?resizew=111)
(1)求抛物线的函数解析式及点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.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/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(3)是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bdf79ad54602f30fe55e96b93bcff24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐2】在某节习题课上,老师在黑板上写下了关于x的二次函数y=kx2+(k+1)x+2-4k.
![](https://img.xkw.com/dksih/QBM/2015/9/28/1573917667516416/1573917673455616/STEM/ad6b437961de48f0aab9009a4660d63c.png)
(1)某两位同学经过思考,对上述的二次函数进行了如下总结:
①该二次函数的图象经过点(1,3);
②当k<0时,该二次函数的图象与y轴的正半轴有交点;
请你判断上面两条结论是真命题还是假命题,并说明理由;
(2)若二次函数y=kx2+(k+1)x+2-4k的图象如图所示,该函数图象经过点B(-3,1)且与y轴交于点A,与x轴的负半轴交于点C,D为图象的顶点.
①求∠BAD的度数;
②点M在第三象限,且点M在二次函数图象上,连接OM.若∠ABD=∠MOC,求点M的横坐标.
![](https://img.xkw.com/dksih/QBM/2015/9/28/1573917667516416/1573917673455616/STEM/ad6b437961de48f0aab9009a4660d63c.png)
(1)某两位同学经过思考,对上述的二次函数进行了如下总结:
①该二次函数的图象经过点(1,3);
②当k<0时,该二次函数的图象与y轴的正半轴有交点;
请你判断上面两条结论是真命题还是假命题,并说明理由;
(2)若二次函数y=kx2+(k+1)x+2-4k的图象如图所示,该函数图象经过点B(-3,1)且与y轴交于点A,与x轴的负半轴交于点C,D为图象的顶点.
①求∠BAD的度数;
②点M在第三象限,且点M在二次函数图象上,连接OM.若∠ABD=∠MOC,求点M的横坐标.
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