如图,在平面直角坐标系中,O为坐标原点,抛物线
经过点
,点P、点Q均在此抛物线上,其横坐标分别为m、
,抛物线上点P、Q之间的部分记为图像G(包括点P、点Q).连接
,以
为对角线作矩形
,且矩形
的各边均与坐标轴平行或垂直.
(2)当
时,该二次函数的最大值是______,最小值是______;
(3)当抛物线在矩形
内的部分所对应的函数值y随x的增大而减小时,直接写出m的取值范围;
(4)当矩形
的面积被坐标轴平分,且该抛物线的最低点是图像G的最低点时,求m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0a02bdd28c0e0b73d3316aec5d9a7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1803dc3c76fd2b51696647aa18602412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1ef2246507cc6a02bc17fab57d4fa2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99393efa04579f3db5cf4f7e319f0440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99393efa04579f3db5cf4f7e319f0440.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c92d41e173f51460bf0573cb3ac27e61.png)
(3)当抛物线在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99393efa04579f3db5cf4f7e319f0440.png)
(4)当矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99393efa04579f3db5cf4f7e319f0440.png)
2024·吉林松原·二模 查看更多[2]
更新时间:2024-06-03 11:25:02
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相似题推荐
解答题-问答题
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【推荐1】【实践探究】
数学课题学习小组,为了研究学习二次函数问题,他们经历了实践——应用——探究的过程:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/098dce8b-1a61-4641-8532-58a8d0d36d7d.png?resizew=417)
(1)实践:他们对一条抛物线形拱桥进行测量,测得当拱顶高离水面
时,水面宽
,并画出了拱桥截面图,建立了如图1所示的直角坐标系,求该抛物线的解析式;
(2)应用:按规定,船通过拱桥时,顶部与拱桥顶部在竖直方向上的高度差至少为
.一场大雨,让水面上升了
,为了确保安全,问该拱桥能否让宽度为
、高度为
的货船通过?请通过计算进行说明(货船看作长方体);
(3)探究:该课题学习小组为进一步探索抛物线的有关知识,他们借助上述抛物线模型,并过原点作一条
的直线
,交抛物线于点
,交抛物线对称轴于点
,提出了以下问题,
如图2,B为直线
上方抛物线上一动点,过 B作
垂直于
轴,交
轴于 A,交直线
于 C,过点 B作
垂直于直线
,交直线
于 D,则
的最大值为 .
数学课题学习小组,为了研究学习二次函数问题,他们经历了实践——应用——探究的过程:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/098dce8b-1a61-4641-8532-58a8d0d36d7d.png?resizew=417)
(1)实践:他们对一条抛物线形拱桥进行测量,测得当拱顶高离水面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e17ee14bd91bfff409c06fd434f6745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167e6e41ac221847824a72e964f340f1.png)
(2)应用:按规定,船通过拱桥时,顶部与拱桥顶部在竖直方向上的高度差至少为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a73babc7157e66044b22633f1a3609.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4caccca18d49c06b4d0188b3f1de77b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e17ee14bd91bfff409c06fd434f6745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a4212fe3f5699630cfc0c8018d131b6.png)
(3)探究:该课题学习小组为进一步探索抛物线的有关知识,他们借助上述抛物线模型,并过原点作一条
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
如图2,B为直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87719c94aace6c1d828d71d8f362c153.png)
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【推荐2】已知二次函数
的图象过点
,与y轴交于点B,直线AB与二次函数的图象的对称轴交于点P.
(1)求点P的坐标;
(2)根据函数图象,直接写出直线AB的函数值大于二次函数值时x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe10bce86165b3bcc848af443160d0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e95e84f5c91c910aaafc5e74dbfbdf59.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/5/7e0622c2-7d33-4b67-83f7-9c6ef6144caf.jpg?resizew=135)
(1)求点P的坐标;
(2)根据函数图象,直接写出直线AB的函数值大于二次函数值时x的取值范围.
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【推荐3】如图1,在平面直角坐标系中,抛物线
与x轴交于A、B两点,与y轴交于点C,已知
,
.
(2)E是
下方的抛物线上一点,过点E作
轴交
于点D,过点E作y轴的平行线交
于点F.求
周长的最大值,以及此时点E的坐标;
(3)如图2,在(2)中
周长取得最大值的条件下,将该抛物线沿y轴向下平移5个单位长度,点P为平移点E的对应点,平移后的抛物线与y轴交于点
,M为平移后的抛物线的对称轴上一点,在平移后的抛物线上确定一点N,使得以点P,
,M,N为顶点的四边形是平行四边形,写出所有符合条件的点N的坐标,并写出求解点N的坐标的其中一种情况的过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc229acc8bf1a2047394bda863b1ea71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d57173ef4cd72eb270686875dfd623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd81cac5d2bcf0753819951088027d1.png)
(2)E是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e8344999680784650f29a28159b1edf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
(3)如图2,在(2)中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
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【推荐1】已知抛物线y=ax2+2ax+3a2﹣4(a≠0).
(1)若该抛物线的顶点在x轴上,求抛物线的解析式;
(2)设点M(m,y1),N(2,y2)在该抛物线上,若y1>y2,求m的取值范围.
(1)若该抛物线的顶点在x轴上,求抛物线的解析式;
(2)设点M(m,y1),N(2,y2)在该抛物线上,若y1>y2,求m的取值范围.
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名校
【推荐2】如图,抛物线y1=﹣
x2+bx+c经过点A(4,0)和B(1,0),与y轴交于点C.
(1)求出抛物线的解析式;
(2)求点C的坐标及抛物线的顶点坐标;
(3)设直线AC的解析式为y2=mx+n,请直接写出当y1<y2时,x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求出抛物线的解析式;
(2)求点C的坐标及抛物线的顶点坐标;
(3)设直线AC的解析式为y2=mx+n,请直接写出当y1<y2时,x的取值范围.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/210640a8-8023-4c9e-bd62-c214fb6fe073.png?resizew=150)
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【推荐1】已知二次函数的图象经过
,且顶点坐标是
,求这个二次函数的表达式.
![](https://img.xkw.com/dksih/QBM/2022/11/30/3120767188869120/3121532908396544/STEM/e4c63eab6edc4a12a75b307fdaf7b09e.png?resizew=174)
(1)将函数
配方成顶点式为___________;
(2)画出其图象(不需要列表),并回答问题:当
<
≤
时,
的取值范围是___________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edbe76df35d112491a26b5d269b4dc10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca280ccbf4426a4e3837e03ac8791d9a.png)
![](https://img.xkw.com/dksih/QBM/2022/11/30/3120767188869120/3121532908396544/STEM/e4c63eab6edc4a12a75b307fdaf7b09e.png?resizew=174)
(1)将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0df5693b7a1c5f609b16fe30a72d508.png)
(2)画出其图象(不需要列表),并回答问题:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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真题
【推荐2】如图,开口向下的抛物线与
轴交于点
、
,与
轴交于点
,点
是第一象限内抛物线上的一点.
![](https://img.xkw.com/dksih/QBM/2020/7/16/2507142061228032/2507160220336128/STEM/eeadd5ff5ac3419fb3fb78dd4cf9d27b.png?resizew=204)
(1)求该抛物线所对应的函数解析式;
(2)设四边形
的面积为
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75c561d105fe43b1a25ae26f0b6aac73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852b303689c31189cd47bb4a3220f9fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec32b9cfee142d1d4f68ab4771de77c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2020/7/16/2507142061228032/2507160220336128/STEM/eeadd5ff5ac3419fb3fb78dd4cf9d27b.png?resizew=204)
(1)求该抛物线所对应的函数解析式;
(2)设四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b581dd2d6db66a656ffe7f15bd8e5bdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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【推荐1】如图,已知抛物线
与x轴交于A,B两点,与y轴交于C点,抛物线的顶点为D点,点A的坐标为
.
(1)求D点的坐标;
(2)连接
,说明
;
(3)若点P是直线
下方抛物线上一动点,当点P位于何处时,
的面积最大?求出此时点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29f09b500a60ed3a5d28eca9546b5de2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/28/e64cb58b-07f8-4879-9ebe-147a7662e69d.png?resizew=225)
(1)求D点的坐标;
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e5141e0c913ff7ea7787d48f7c1d984.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3bbe4cdd2c154bd9a8073b0d4cecb8a.png)
(3)若点P是直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
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【推荐2】如图,二次函数
的图象交
轴于
、
两点,交
轴于点
且
,将
绕点
按逆时针方向旋转
,
点恰好与
重合.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/18/4c4dda7d-f034-4d42-95cc-e8296fd02116.png?resizew=171)
(1)求该二次函数的解析式;
(2)若点
为线段
上的任一动点,过点
作![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a3137705cb4170baafa66ff46eefb7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
,交
于点
,连结
,求
面积
的最大值;
(3)对称轴上是否存在一点
,使
为直角三角形,直接写出
点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.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/d31c11665576d5ae71a11d8d25d72cd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c40363a7a1e4d68af8e5a84e5adb5b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ea7250b555cef87fa1dfd50f8cd1f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a0387fc1258f31e44a10068c0ccfd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/18/4c4dda7d-f034-4d42-95cc-e8296fd02116.png?resizew=171)
(1)求该二次函数的解析式;
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a3137705cb4170baafa66ff46eefb7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcfaca9396f85c0137b534903321fcbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58fb3fd02b6a29ddb0636b54d64f5b68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(3)对称轴上是否存在一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd4edd4d6067c20c1e680d730dbb6d56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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