在平面直角坐标系
中,已知抛物线
交
轴于
,
两点,与
轴交于点
.
(1)求抛物线的函数解析式;
(2)如图1,
为直线
上方抛物线上一动点,连接
,交
于
,求
的最大值;
(3)如图2,连接
,
过点O作直线
,点P、Q分别为直线
和抛物线上的点.试探究:在第四象限是否存在这样的点P、Q,使
.若存在,请直接写出所有符合条件的点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7795aec93c2c7ac2fd93e6747ca6516c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0d44326c214c7a5ecc3068a29ec96f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ba5cbb31299d683ac6c7dd795db85.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/2023/7/8/2441b5ac-76ed-4547-8fb1-aa0854d55ac1.png?resizew=484)
(1)求抛物线的函数解析式;
(2)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefd4b2184d5660c6e44cfd2ee099d85.png)
(3)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60a1eb9d682e2bd181f3b0f5115160b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f321b04dde311fcb7178099b77e80718.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
更新时间:2023-07-02 18:01:45
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相似题推荐
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【推荐1】如图1,在平面直角坐标系中,抛物线y=ax2+bx+4与x轴交于点A(﹣2,0)、B(4,0),与y轴交于点C.
(1)求抛物线的函数解析式;
(2)点D是抛物线上一点,D点横坐标为3,连接AD,点P为AD上方抛物线上一点,连接PA,PD,请求出△PAD面积的最大值及此时点P的坐标;
(3)如图2,将原抛物线y=ax2+bx+4沿x轴负半轴方向平移2个单位长度,得到新抛物线y1=a1x2+b1x+c1(a1≠0),新抛物线与原抛物线交于点M.点N是原抛物线对称轴上一点,在平面直角坐标系内是否存在点Q,使得以点A、M、N、Q为顶点的四边形是矩形?若存在,请直接写出点Q的坐标;若不存在,请说明理由.
(1)求抛物线的函数解析式;
(2)点D是抛物线上一点,D点横坐标为3,连接AD,点P为AD上方抛物线上一点,连接PA,PD,请求出△PAD面积的最大值及此时点P的坐标;
(3)如图2,将原抛物线y=ax2+bx+4沿x轴负半轴方向平移2个单位长度,得到新抛物线y1=a1x2+b1x+c1(a1≠0),新抛物线与原抛物线交于点M.点N是原抛物线对称轴上一点,在平面直角坐标系内是否存在点Q,使得以点A、M、N、Q为顶点的四边形是矩形?若存在,请直接写出点Q的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2021/4/18/2702479410708480/2703008856940544/STEM/ec6d7983-025a-4346-8e2f-22eada0edff5.png?resizew=551)
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【推荐2】如图,抛物线
与x轴相交于A(1,0),B(5,0),与y轴相交于点C,对称轴与x轴相交于点M.P是抛物线上一个动点(点P、M、C不在同一条直线上),分别过点A、B作AD⊥CP,BE⊥CP,垂足分别为点D、E,连接MD、ME.
(1)求抛物线的解析式;
(2)若点P在第一象限内,使
,求点P的坐标;
(3)点P在运动过程中,△MDE能否为等腰直角三角形?若能,求出此时点P的坐标;若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b736d8cb466f0dad19f905000aba4da0.png)
(1)求抛物线的解析式;
(2)若点P在第一象限内,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04bd9a7f94b870000ad29263ba610290.png)
(3)点P在运动过程中,△MDE能否为等腰直角三角形?若能,求出此时点P的坐标;若不能,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/9/04fb92fe-f1c7-4ff8-903b-a8bd62e5fc4b.png?resizew=492)
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【推荐1】在平面直角坐标系
中,抛物线
经过
和
两点.
(1)求
的值及
,
满足的关系式;
(2)抛物线同时经过两个不同的点
,
.
①若
,求
的值;
②若
,
,求
的值;
③若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c87b7e39ab4c173e357d92f345ddab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23c6e58ccbc2c37baf9706c530437b72.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)抛物线同时经过两个不同的点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fabe8184d5d7f0406382577880de5428.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfc91cd344e711f6d4a1d9e10cef306.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0a4480988244a9d04ec293975db2cc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/335906f204769bedfb4efa572be9b800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dac2d57e4943694725de8f4043c7eb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7091d529281abff275ef19b9197445a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
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【推荐2】某超市从厂家购进A、B两种型号的水杯,两次购进水杯的情况如下表:
(1)求A、B两种型号的水杯进价各是多少元?
(2)在销售过程中,A型水杯因为物美价廉而更受消费者喜欢.为了增大B型水杯的销售量,超市决定对B型水杯进行降价销售,当销售价为44元时,每天可以售出20个,每降价1元,每天将多售出5个,请问超市应将B型水杯降价多少元时,每天售出B型水杯的利润达到最大?最大利润是多少?
(3)第三次进货用10000元钱购进这两种水杯,如果每销售出一个A型水杯可获利10元,售出一个B型水杯可获利9元,超市决定每售出一个A型水杯就为当地“新冠疫情防控”捐b元用于购买防控物资.若A、B两种型号的水杯在全部售出的情况下,捐款后所得的利润始终不变,此时b为多少?利润为多少?
进货批次 | A型水杯(个) | B型水杯(个) | 总费用(元) |
一 | 100 | 200 | 8000 |
二 | 200 | 300 | 13000 |
(2)在销售过程中,A型水杯因为物美价廉而更受消费者喜欢.为了增大B型水杯的销售量,超市决定对B型水杯进行降价销售,当销售价为44元时,每天可以售出20个,每降价1元,每天将多售出5个,请问超市应将B型水杯降价多少元时,每天售出B型水杯的利润达到最大?最大利润是多少?
(3)第三次进货用10000元钱购进这两种水杯,如果每销售出一个A型水杯可获利10元,售出一个B型水杯可获利9元,超市决定每售出一个A型水杯就为当地“新冠疫情防控”捐b元用于购买防控物资.若A、B两种型号的水杯在全部售出的情况下,捐款后所得的利润始终不变,此时b为多少?利润为多少?
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【推荐1】在
中,
,OA平分
交BC于点O,以O为圆心,OC长为半径作圆交BC于点D.
![](https://img.xkw.com/dksih/QBM/2020/7/17/2507810170437632/2507852072665088/STEM/c0fcc233718d4e159cb85754dce8bc78.png?resizew=495)
(1)如图1,求证:AB为
的切线;
(2)如图2,AB与
相切于点E,连接CE交OA于点F.
①试判断线段OA与CE的关系,并说明理由.
②若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a355958abf7dc0f2eb949584cb87907b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://img.xkw.com/dksih/QBM/2020/7/17/2507810170437632/2507852072665088/STEM/c0fcc233718d4e159cb85754dce8bc78.png?resizew=495)
(1)如图1,求证:AB为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)如图2,AB与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
①试判断线段OA与CE的关系,并说明理由.
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f07cab7423ecb46f083a5999b2fd5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03005d17bf564371ad29fea41f5c650.png)
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【推荐2】如图,抛物线与
轴交于
(
,0)、
(
,0)两点,且
,与
轴交于点
,其中
是方程
的两个根.
(1)求抛物线的解析式;
(2)点
是线段
上的一个动点,过点
作
∥
,交
于点
,连接
,当
的面积最大时,求点
的坐标;
(3)点
在(1)中抛物线上,点
为抛物线上一动点,在
轴上是否存在点
,使以
为顶点的四边形是平行四边形,如果存在,求出所有满足条件的点
的坐标,若不存在,请说明理由.
![](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/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0ec7f84f716a316ec92d133927666c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd8ca3aa2d1ba52e82613d0d65d800e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffa6a8471c126c4c6b789490d84144b.png)
(1)求抛物线的解析式;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12225a1a1eda07908309f8100cc34726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d34ea4887dc1dacb67484149086cda97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f71b234c8080dba00c2dac4dc72e5fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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【推荐1】已知二次函数
的图象与x轴交于A、B两点,顶点为C.
当A、B两点的坐标分别为
,
时,求a、b满足的关系式.
若该函数图象的对称轴是直线
,且
为等腰直角三角形.
①求该二次函数的解析式
用只含a的式子表示
;
②在
范围内任取三个自变量
、
、
,所对应的三个函数值分别为
、
、
,若以
、
、
为长度的三条线段能围成三角形,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dc27ec08f79f3744450944c7d65aaa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d8333029443d2e3400033ed4da5bffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff3327985783ceffe34d59662599247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679353e656a54993c041ebd39ec7b31b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
①求该二次函数的解析式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
②在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17cc2235ce9fcfbf3f922d6e245807d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/040135d64192de075ba0cc9f11ddbc9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa33c2bd791339d32821077846605d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea68e3e47a094d30bcda211741da5d77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81968aa7eaa2f1c6294435ae72ebc11d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cdf7aaf44733c758606ff325047ab1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60064d2c5613fdf36ab5a27b6dbe2059.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81968aa7eaa2f1c6294435ae72ebc11d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cdf7aaf44733c758606ff325047ab1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60064d2c5613fdf36ab5a27b6dbe2059.png)
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【推荐2】如图①,在平面直角坐标系中,抛物线y=ax2+bx+c与x轴交于A(﹣1,0)、B(4,0)两点,与y轴交于点C(0,﹣2),点P在直线BC下方的抛物线上,过点P作PD⊥x轴于点D,交直线BC于点E,并连接AC、CP.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/134818e8-f768-46e3-9646-0a118663d431.png?resizew=417)
(1)求抛物线的解析式;
(2)连接BP,设四边形ABPC的面积为S,当S最大时,求点P的坐标及最大值;
(3)如图②,过点P作PF⊥BC于点F,当以C、P、F为顶点的三角形与△AOC相似时,求点P的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/134818e8-f768-46e3-9646-0a118663d431.png?resizew=417)
(1)求抛物线的解析式;
(2)连接BP,设四边形ABPC的面积为S,当S最大时,求点P的坐标及最大值;
(3)如图②,过点P作PF⊥BC于点F,当以C、P、F为顶点的三角形与△AOC相似时,求点P的坐标.
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