如图1,抛物线
与
轴交于点
,
两点,交
轴于点
,连接
,点
为
上方抛物线上的一个动点,过点
作
于点
.
(2)求线段
的最大值;
(3)如图2,将抛物线
沿
轴翻折得到抛物线
,抛物线
的顶点为
,对称轴与
轴交于点
,过点
的直线(直线
除外)与抛物线交于
,
两点,直线
,
分别交
轴于点
,
,试探究
是否为定值?若是,请求出该定值;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b6b2a7d3fe0701f05ef87a224f630e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ee80939187a84e1863eeb192a301c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b47e7bf02b3ca16f7d96b9369e51a3.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(3)如图2,将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d18a23b675f3db4ebd1c13f136591dfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67716ac738ee2911a69bf4063110a5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b375a47aa4ec53f6a501c465803c501.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7eab036cb67e434bf8b3e9427a26cdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/bd81a71ed53e10677ddb0903c105d28e.png)
更新时间:2024-04-11 09:12:02
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】在平面直角坐标系中,将函数
为常数
的图象记为
.
(1)若
;
①点
在图象
上时,求
的值;
②直接写出
随
增大而减小的
的取值范围;
(2)当
时,
的最高点的纵坐标与最低点的纵坐标的差为
,写出
与
的关系,并写出
的取值范围;
(3)直线
与直线
与
分别交于
、
,若
,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f678bdd3972d8dae5da78409125c1ea5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
①点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3e0ed2154413ad12feb171ccb9591ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
②直接写出
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34d22fadbe4555c3adaea076cb94bdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.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)
(3)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36d71f015144ffaf1faec94a259b4a06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d1d5798905e0b0a5de2279e0bde5382.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.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/0e6b253b7f7aa120fa6dd980bfc5fabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.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,已知二次函数
的图象经过点C(0,3),与
轴分别交于点A、点B(3,0).点
、
、
都在这个二次函数的图象上,其中0<
<4,连接DE、DF、EF,记△DEF的面积为S.
(1)求二次函数
的表达式;
(2)若
=0,求S的最大值,并求此时
的值;
(3)若
=2,当
取不同数值时,S的值是否变化,如不变,求该定值;如变化,试用含
的代数式表示S.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef29d44f43562c120ff9f6daf3c00383.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a20a40fab2e9aab880bc165bd279fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf9a12c522e2765ca8d151677571ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2aae48493b5e061a2b7fa17920f6eb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(1)求二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef29d44f43562c120ff9f6daf3c00383.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://img.xkw.com/dksih/QBM/2018/11/16/2076734636990464/null/STEM/5858b156a0194dec89c66adfa682e2ed.png?resizew=421)
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解答题-证明题
|
较难
(0.4)
解题方法
【推荐1】如图,函数
的图象经过点
,
两点,
,
分别是方程
的两个实数根,且
.
(1)求
,
的值以及函数的解析式;当
时,求函数
的最大值和最小值;
(2)设抛物线
与
轴的另一个交点为
,抛物线的顶点为
,连接
,
,
,
求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1d8e820de039970450591eea09c1d0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd06d4b3e9eb84cb458491e8cf75e517.png)
![](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/8034dddd265a186e29172623e3b9eadf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb7961cbe98aac6a5fdee94582c341b4.png)
(1)求
![](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/c0cef240d477c67ab70bef415cb36551.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)设抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080fa30a66221d27060c37c17a56b445.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/7d124512-75d5-446f-8680-fa93d3258f3b.png?resizew=238)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】设二次函数
(
是常数).
时,求二次函数
的顶点坐标.(用含
的代数式表示)
(2)若
时,求二次函数
的最大值.(用含
的代数式表示)
(3)若
时,如图,直线
与此函数图象交于
两点,点
不在二次函数图象上,线段
分别交二次函数图象于点
,且
,求点
的纵坐标的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d8bf01092d97f3c2d199f25bda462b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9a475fec8ded321e10a6697319fb975.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/239ea0e903fbb4c8ce04133b9969578c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5525e928148272377592964c45c76abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a992bf546c85dc454aa6778ff678f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab466aedd6e176088d8dee7bc3e3aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942eb0d83783438d738a0ec3fad08e3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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解答题-问答题
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较难
(0.4)
名校
【推荐1】如图1,抛物线
与x轴交于
,
两点,与y轴交于点C.
(2)点P在抛物线上且位于y轴右侧,点Q在x轴上,以点B,C,P,Q为顶点的四边形为平行四边形,求点P的坐标;
(3)如图2,抛物线顶点为D,对称轴与x轴交于点E,过点
的直线(直线
除外)与抛物线交于G,H两点,直线
分别交x轴于点M,N求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16403fc9b29d6d8e814318ee24a9dc05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d57173ef4cd72eb270686875dfd623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f36488f7dff759ace2a27e56c3857056.png)
(2)点P在抛物线上且位于y轴右侧,点Q在x轴上,以点B,C,P,Q为顶点的四边形为平行四边形,求点P的坐标;
(3)如图2,抛物线顶点为D,对称轴与x轴交于点E,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3356ff3f21b76774c48165c807f12b41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a78abb4b37ce31f711fc7b95c2fb45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c279dc1659e69970a149e8c892b82f8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55f2599233ab889a17b84ef1a2522716.png)
您最近一年使用:0次
解答题-问答题
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较难
(0.4)
名校
【推荐2】如图,在平面直角坐标系中,抛物线y=ax2+bx+c的图象与x轴交于A(4,0),B两点,与y轴交于点C(0,2),对称轴x=1,与x轴交于点H.
(1)求抛物线的函数表达式;
(2)直线y=kx+1(k≠0)与y轴交于点E,与抛物线交于点 P,Q(点P在y轴左侧,点Q在y轴右侧),连接CP,CQ,若△CPQ的面积为
,求点P,Q的坐标;
(3)在(2)的条件下,连接AC交PQ于G,在对称轴上是否存在一点K,连接GK,将线段GK绕点G顺时针旋转90°,使点K恰好落在抛物线上,若存在,请直接写出点K的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/18/0e1095b9-e28b-4930-a923-3ba64959e7f9.png?resizew=407)
(1)求抛物线的函数表达式;
(2)直线y=kx+1(k≠0)与y轴交于点E,与抛物线交于点 P,Q(点P在y轴左侧,点Q在y轴右侧),连接CP,CQ,若△CPQ的面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd625a9e16a30985239606b5834f0196.png)
(3)在(2)的条件下,连接AC交PQ于G,在对称轴上是否存在一点K,连接GK,将线段GK绕点G顺时针旋转90°,使点K恰好落在抛物线上,若存在,请直接写出点K的坐标;若不存在,请说明理由.
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