下图是某同学正在设计的一动画示意图,
轴上依次有
,
,
三个点,且
,在
上方有五个台阶
(各拐角均为
),每个台阶的高、宽分别是1和1.5,台阶
到
轴距离
.从点
处向右上方沿抛物线
:
发出一个带光的点
.
![](https://img.xkw.com/dksih/QBM/2021/6/22/2748574003732480/2748701406085120/STEM/439de0be-b74f-4f5e-8ec9-506111719bcf.png)
(1)求点
的横坐标,且在图中补画出
轴,并直接 指出点
会落在哪个台阶上;
(2)当点
落到台阶上后立即弹起,又形成了另一条与
形状相同的抛物线
,且最大高度为11,求
的解析式,并说明其对称轴是否与台阶
有交点;
(3)在
轴上从左到右有两点
,
,且
,从点
向上作
轴,且
.在
沿
轴左右平移时,必须保证(2)中沿抛物线
下落的点
能落在边
(包括端点)上,则点
横坐标的最大值比最小值大多少?
【注:(2)中不必写
的取值范围】
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01cd2bf7c88e24c91625e0f20ba2a4bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbf693dc909eb48a6bfddfcb1c701545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9a724b59c890095baa5cb73e267c44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50753afb4f706f4a1308c4a87b717937.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d63494ec73f665ac77eb12656b20573.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2021/6/22/2748574003732480/2748701406085120/STEM/439de0be-b74f-4f5e-8ec9-506111719bcf.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.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/2bb192110266d1aefe5a1de2adcc927e.png)
(3)在
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82773737609e65dea3c5c67099f1b10d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e61fcbf0d7edec7218c853d5b2e523df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60634341a9603e24b2bbc6960abe3d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
【注:(2)中不必写
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
2021·河北·中考真题 查看更多[9]
河北省2021年中考数学试题(已下线)专题16 函数与其他实际运用问题【考点精讲】-【中考高分导航】备战2022年中考数学考点总复习(全国通用)2022年福建省厦门市湖里中学九年级下学期适应性练习数学试题(已下线)专题03 函数-5年(2018-2022)中考1年模拟数学真题分项汇编(河北专用)江苏省苏州市苏州工业园区星汇学校2022-2023学年九年级下学期3月月考数学试题2022年江西省新余市第一中学中考数学模拟试卷 (已下线)22.3 实际问题与二次函数(习题)-2022-2023学年九年级数学上册同步精讲精练(人教版)(已下线)河北中考数学历年真题二次函数应用、综合题16-二次函数实际应用
更新时间:2021-06-22 21:50:14
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解答题-问答题
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【推荐1】如图,在平面直角坐标系中,直线
分别交
轴、
轴于A、B两点.抛物线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
经过A、B两点,且与
轴的另一个交点为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/a753ec48-96be-4998-a25d-31648a730b28.png?resizew=161)
(1)求该抛物线的解析式;
(2)点
为直线
上一点,点
为该抛物线上一点,且
、
两点的纵坐标都为
.点
为
轴上的点,若四边形
是平行四边形,请直接写出点
的坐标;
(3)若点
是线段
上的一个动点,过点
作
轴的垂线,交该抛物线于点
,连结
、
,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c608def11fa0e2b34f05592ef1d11fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f2b5ee1eabb64358a3d9db2349b6fce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37df9dad3961893b22d6639c4311e267.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/a753ec48-96be-4998-a25d-31648a730b28.png?resizew=161)
(1)求该抛物线的解析式;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b17f20c25bb16153b5f2d25062ed7a7.png)
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【推荐2】如图,直线
分别交
轴、
轴于
、
两点,
绕点
按逆时针方向旋转
后得到
,抛物线
经过
、
、
三点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/16/9ac58d1d-81c2-44b8-9a67-4160c2e461e6.png?resizew=210)
(1)填空:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2118e5d9ce2fb68b4d2970176ff79251.png)
,
、
,
、
,
;
(2)求抛物线的函数关系式;
(3)
为抛物线的顶点,在线段
上是否存在点
,使得以
、
、
为顶点的三角形与
相似?若存在,请求出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c30056990f61f896705dbe3a1fd9d27c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f96bcaab1157f577919c7abc73a66ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/16/9ac58d1d-81c2-44b8-9a67-4160c2e461e6.png?resizew=210)
(1)填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2118e5d9ce2fb68b4d2970176ff79251.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a920a78c48e71749017d40e01caa3a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccecddacc80dc992f3be048cb68fd3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
(2)求抛物线的函数关系式;
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f96bcaab1157f577919c7abc73a66ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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名校
【推荐1】设a,b是任意两个不等实数,我们规定:满足不等式
的实数x的所有取值的全体叫做闭区间,表示为
对于一个函数,如果它的自变量x与函数值y满足:当
,我们就称此函数是闭区间
上的“闭函数”.
(1)反比例函数
是闭区间
上的“闭函数”吗?请判断并说明理由;
(2)若一次函数
是闭区间
上的“闭函数”,求此函数的解析式;
(3)若函数
是闭区间
上的“闭函数”,求实数a,b的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaa4d614ccf2cba64c8a7f4feb1cd784.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86f2188098b9efad835b1e7401358d7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd29eeaad9f0e86880945d33277fe864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea31d4b3e4f6f00eae251a4259d6c5a.png)
(1)反比例函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e392be253c07f5eebce762ebde08ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de838a6dc7bcef3fb276c2dd3ed750f7.png)
(2)若一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8f5c601899b541cf17eb5592221a782.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea31d4b3e4f6f00eae251a4259d6c5a.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cf2e1985ad7d97cdf61135f7bf8bf9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/616996075e3f8ac4bc90b3b569940d0f.png)
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【推荐2】函数图象在探究函数的性质时有非常重要的作用,某同学根据学习函数的经验,探究了函数
的图形和性质.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/16dd6857-b23d-448f-b4be-7f4ebc6a844d.png?resizew=295)
(1)如表给出了部分
的取值:
则
___________,
___________.
(2)在如图所示的平面直角坐标系中画出函数
的图象.
(3)根据画出的函数图象,写出该函数的一条性质.
(4)若点
在图象上,且
,若点
也在图象上,且满足
恒成立,请直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b479caa64218b0ee46b01894fc5daaae.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/16dd6857-b23d-448f-b4be-7f4ebc6a844d.png?resizew=295)
(1)如表给出了部分
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d708cb763716467219215cdc0782c0a6.png)
![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
(2)在如图所示的平面直角坐标系中画出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b479caa64218b0ee46b01894fc5daaae.png)
(3)根据画出的函数图象,写出该函数的一条性质.
(4)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c77ab173541e8625ff40d7ae67a2c82b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdf5b5b124e081c85c9d8818d1917611.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/287c039a5f3fb43074c15d59eb4284d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bccca53775117217dbd07dd58b000956.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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解题方法
【推荐3】给定一个函数,如果这个函数的图象上存在一个点,它的横、纵坐标相等,那么这个点叫做该函数的不变点.
(1)一次函数
的不变点的坐标为______.
(2)二次函数
的两个不变点分别为点
(
在
的左侧),将点
绕点
顺时针旋转90°得到点
,求点
的坐标.
(3)已知二次函数
的两个不变点的坐标为
.
①求
的值;
②如图,设抛物线
与线段
围成的封闭图形记作
.点
为一次函数
的不变点,以线段
为边向下作正方形
.当
两点中只有一个点在封闭图形
的内部(不包含边界)时,求出
的取值范围.
(1)一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a026fe55f6e9fe8ebefa239d56d9b2.png)
(2)二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b71748e80e9f8ac859402ff5592678d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b1b15a4605fce993cb13aefbf40360.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
(3)已知二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358e2987096a67189bcc2a642da39524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dac1976c5578a0f8f12489b3de7e342b.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663a61ad241d5d874c9a9362f0ee917c.png)
②如图,设抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358e2987096a67189bcc2a642da39524.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8f0dfae8f229db6882d7dc830fa2d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9d54cbbf601f4583659771eb534997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a51949f48ee8cf746851ba779b078e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://img.xkw.com/dksih/QBM/2020/4/23/2454060158771200/2454937448062976/STEM/5d9a1f8a-8c87-434f-a79e-8e18b8ad2cd3.png)
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