已知
,
两点在一次函数
与二次函数
的图象上.
(1)求
的值和二次函数的解析式;
(2)请直接写出使
时,自变量
的取值范围为______;
(3)直接写出所求的抛物线
关于
轴对称的抛物线的解析式为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e797f15573866b660a25b72a9f85797d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be4715dd5f2139c84d0302095d226302.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe68aff9ee861b9e26c2c3e0fca159b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e67dd438e8704b95f619d49dfe787889.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)请直接写出使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f99df1a7b58018125b99578b779342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)直接写出所求的抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e67dd438e8704b95f619d49dfe787889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
更新时间:2023-12-22 15:01:39
|
相似题推荐
解答题-作图题
|
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【推荐1】一次函数
的图像与反比例函数
的图像相交于点
,
两点.
![](https://img.xkw.com/dksih/QBM/2022/4/19/2961545065644032/2962288067289088/STEM/018c1678-1174-4c10-a916-6b2a7c505fc4.png?resizew=395)
(1)分别求出一次函数和反比例函数的解析式,并在给出的平面直角坐标系中,直接画出一次函数和反比例函数的图像;
(2)连接AO并延长交双曲线于点C,连接BC,求△ABC的面积;
(3)直接写出当
时,x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5158c4b005e899adddf3c3b4381c48b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8318ee110e9fd961b0b484c2d6577b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fadc9a19de13ca7688ca93f0c70a8a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6163098c312b3a256334d8d2d0b6317e.png)
![](https://img.xkw.com/dksih/QBM/2022/4/19/2961545065644032/2962288067289088/STEM/018c1678-1174-4c10-a916-6b2a7c505fc4.png?resizew=395)
(1)分别求出一次函数和反比例函数的解析式,并在给出的平面直角坐标系中,直接画出一次函数和反比例函数的图像;
(2)连接AO并延长交双曲线于点C,连接BC,求△ABC的面积;
(3)直接写出当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f99df1a7b58018125b99578b779342.png)
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【推荐2】若二次函数
的图象的顶点在一次函数
的图象上,则称
为
的伴随函数,如
是
的伴随函数.
(1)若函数
先向右平移2个单位,再向上平移1个单位后是
的伴随函数,求
的值
(2)若函数
的伴随函数
与
轴只有一个交点,求当
时,
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38298d384e83f1a5bcea0f27cbb030bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38298d384e83f1a5bcea0f27cbb030bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2b629bea8e22de9bfc49158e2289871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab466aedd6e176088d8dee7bc3e3aaa.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87e61e0a1bc2ab34fe0cd1de9f59b0e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e707d88b1d869fa8d5ab47282fc16eaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/067d1969742a5eac572614bc747144e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a26073e6d0eac19f2c2cd4957cf664c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f99df1a7b58018125b99578b779342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐1】如图,在平面直角坐标系中,抛物线
与x轴交于点
,
,与y轴交于点C,连接
.
(2)P是第一象限内抛物线上的一个动点,过点P作直线
轴于点
,交
于点N,连接
.
的面积记为
,
的面积记为
,当
时,求m的值;
(3)在(2)的条件下,点Q在抛物线上,直线
与直线
交于点H,当
与
相似时,请直接写出点Q的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c9800e4b992044d16681e77ff6563c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2375a27ead9549550676d4e6a2b47243.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69fff64ee6ea236550185efc7ed1b598.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)P是第一象限内抛物线上的一个动点,过点P作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/165a501b2e6a3acc46212e59a166c053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b476509d73c4a0091277b6fd5605aab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d8bc8230f3a48803cf2c43887eb344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08fa5b7ee3c02add5668fcdfd13e4b6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f955e5cc9f108de6f3ca01e5eb84c52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31dd78e9156dcf6db93f6cbcc5b43b14.png)
(3)在(2)的条件下,点Q在抛物线上,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dca049735b45fb9b2533c68605eddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbdc82c9ba581fa7f462ed812d195cb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f955e5cc9f108de6f3ca01e5eb84c52e.png)
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【推荐2】已知抛物线
经过点
,点A,点B均在抛物线上,且
轴.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/3c701339-f10d-4074-af6b-97fd467c1d84.png?resizew=140)
(1)求b的值和抛物线的顶点坐标.
(2)在第一象限内作一个矩形
,点
落在x轴上.将抛物线
平移,使抛物线顶点落在矩形
内部(包括顶点),新抛物线与y轴交点为
,若
,请求出c的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/919c67335f6b2a999065dd49593d5f4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e32f16d75ccb62a04970f861827fca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcb94c4a46f48f243f98768a5ee34a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/3c701339-f10d-4074-af6b-97fd467c1d84.png?resizew=140)
(1)求b的值和抛物线的顶点坐标.
(2)在第一象限内作一个矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80ef9a90c2b57dd9b1cf673f554113a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
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名校
【推荐1】小明同学学习二次函数后,对函数
进行了研究.在经历列表、描点、连线步骤后得到如下的函数图像,请根据函数图像回答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/13/f0cbf968-f7d2-4441-804f-ba3d4feeb1c8.png?resizew=282)
(1)观察研究:
①方程
的解为_________;
②关于x的方程
有四个实数根时,a的取值范围是_________;
(2)综合应用:
当函数
的图像与直线
有三个交点时,求出b的值;
(3)延伸思考:
将函数
的图像经过怎样的平移可得到函数
的图像?请写出平移过程,并直接写出当
时,自变量x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd0a4f92862cac1ef6ffef92cc4a56d0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/13/f0cbf968-f7d2-4441-804f-ba3d4feeb1c8.png?resizew=282)
(1)观察研究:
①方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4007fa0ccd53be8ed7931cd1f3d31745.png)
②关于x的方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96e5ea3bfe4a7df8cd90a1550db7a106.png)
(2)综合应用:
当函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd0a4f92862cac1ef6ffef92cc4a56d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07565f10847840e0fb07b05218ad17fa.png)
(3)延伸思考:
将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd0a4f92862cac1ef6ffef92cc4a56d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5437f1115127d96ff46000642d7446c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b86191cafcd2a74d9750af4c76646e33.png)
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【推荐2】设二次函数
的图象为C1.二次函数
的图象与C1关于y轴对称.
![](https://img.xkw.com/dksih/QBM/2014/12/9/1573765084766208/1573765090820096/STEM/993a9815564440bcbb5981d1cd49c6fb.png?resizew=203)
(1)求二次函数
的解析式;
(2)当
≤0时,直接写出
的取值范围;
(3)设二次函数
图象的顶点为点A,与y轴的交点为点B,一次函数
( k,m为常数,k≠0)的图象经过A,B两点,当
时,直接写出x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a32d30dc00f0bac2ac24ac33155e02bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bce0e4aa2b25c3350a2777b30c81ed89.png)
![](https://img.xkw.com/dksih/QBM/2014/12/9/1573765084766208/1573765090820096/STEM/993a9815564440bcbb5981d1cd49c6fb.png?resizew=203)
(1)求二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c40a11d16dda3cd4b4d1bc0fdb48520c.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dc83e605ef393ebbf230edd5c7020f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
(3)设二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bce0e4aa2b25c3350a2777b30c81ed89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d5b97a1e5b19cee9d1bb6819d250ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e78aadf83bf70ae350e3820570e705.png)
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【推荐3】云南有着复杂的自然地理条件,十分有利于中药材的生长.某种中药材成本每斤500元某药材公司试销一段时间发现:每周的销售量y(斤)与销售单价x(元/斤)满足的关系如下表:
(1)请根据表中的数据写出y与x之间的函数关系式;
(2)根据有关部门规定,该药材售价不允许超过700元.该药材公司每周获利w元,试写w与x之间的函数关系式,并求出药材公司每周的最大利润.
(3)在(2)的条件下,若该药材公司每周获利不少于40000元,试确定销售单价x的取值范围.
x(元/斤) | 550 | 600 | 650 | 680 |
y(斤) | 450 | 400 | 350 | 320 |
(2)根据有关部门规定,该药材售价不允许超过700元.该药材公司每周获利w元,试写w与x之间的函数关系式,并求出药材公司每周的最大利润.
(3)在(2)的条件下,若该药材公司每周获利不少于40000元,试确定销售单价x的取值范围.
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【推荐1】在平面直角坐标系中,已知点
,将点
先向右平移3个单位长度,再向上平移2个单位长度,得到点
.
(1)点
的坐标为______;
(2)若抛物线
与线段
有公共点,则
的取值范围是______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448c0a5ee776d19ce8e42ac9a5fd27c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32ef0bd5305cdeff9c869335b0580e39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解题方法
【推荐2】定义:函数图象
上的点
的纵坐标
与横坐标
的差
叫做点
的“双减差”,图象
上所有点的“双减差”中最小值称为函数图象
的“幸福值”如:抛物线
上有点
,则点
的“双减差”为12;而抛物线
上所有点的“双减差”
,即该抛物线的“幸福值”为
.根据定义,解答下列问题:
(1)已知函数
图象上点
的横坐标
,求点
的“双减差”
的值;
(2)若直线
的“幸福值”为
,求
的值;
(3)设抛物线
顶点的横坐标为
,且该抛物线的顶点在直线
,当
时,抛物线
的“幸福值”是5,求该抛物线的解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8701e0cce437edc830438b4fe6277d89.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/b3677f2a2a1b4aef3a370a03db832366.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ccbf79da6ad7e3709d6fa72efb756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29dca64bd453c666c15cb0fab00cff91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ccbf79da6ad7e3709d6fa72efb756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3d5851d8a085592652d72ffe1552292.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602baac86c2b1668ecdfadc8a5948885.png)
(1)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/646e11d5bff57e56ce82c2339f2d71ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3677f2a2a1b4aef3a370a03db832366.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777e723e6319dfffae58caf2b5c8a30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/621510df298fb9e5ed207c462085d44e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)设抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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