抛物线
过点
和点
,与
轴交于点
,顶点为点
.
(Ⅰ)求点
的坐标;
(Ⅱ)点
是线段
上一动点,过点
作直线
轴,交抛物线于点
,连接
并延长交
轴于点
,连接
.若
的面积是
面积的2倍,求点
的坐标;
(Ⅲ)抛物线上一点
,点
的横坐标是
,连接
,与
轴交于点
,点
是线段
上一动点(不与点
,点
重合)将
沿
所在直线翻折,得到
,当
与
重叠部分的面积是
面积的
时,求线段
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c9800e4b992044d16681e77ff6563c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311497849126f1aaf1da0ec75602eabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d03fa28c117649b0fdfe17eed7b583.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/8455657dde27aabe6adb7b188e031c11.png)
(Ⅰ)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67346d0f913f378b4305ca5554c9d259.png)
(Ⅱ)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/165a501b2e6a3acc46212e59a166c053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7fda55ab83030ca62ca40992e2c670c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21786fe6fbbd671ba5158f4a920b8884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f02028a3847c4807c2d3cf0ea7efb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(Ⅲ)抛物线上一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7bf58e5fea1189b33cf55d86335452f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/9b1ec05e3cec27677ded7b4aecaa62d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8dcc9f79fe5f07f25447aa442ee14ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a9bf6bda9363dbef5f6ff4bf6a5edf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a9bf6bda9363dbef5f6ff4bf6a5edf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/479ddf866083b5bfcb483d2f3079ad4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08a11972f64061fe94578898725789ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56e733a15f50fdde9ac81ac1ce6e863f.png)
2021·天津和平·二模 查看更多[3]
2021年天津市和平区中考二模数学试卷(已下线)第22章 二次函数【B卷】-2021-2022学年九年级数学上册同步必刷基础拓展单元卷(人教版)(已下线)卷1-备战2022年中考数学【名校地市好题必刷】全真模拟卷(山东济南专用)·第二辑
更新时间:2021-06-02 11:33:17
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相似题推荐
解答题-问答题
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【推荐1】如图(含备用图),在直角坐标系中,已知直线y=kx+3与x轴相交于点A(2,0),与y轴交于点B.
![](https://img.xkw.com/dksih/QBM/2022/5/20/2983500658163712/2984375588962304/STEM/1510a629e48f403c82d8ceee77a01f93.png?resizew=325)
(1)求k的值及△AOB的面积;
(2)点C在x轴上,若△ABC是以AB为腰的等腰三角形,直接写出点C的坐标;
(3)点M(3,0)在x轴上,若点P是直线AB上的一个动点,当△PBM的面积与△AOB的面积相等时,求点P的坐标.
![](https://img.xkw.com/dksih/QBM/2022/5/20/2983500658163712/2984375588962304/STEM/1510a629e48f403c82d8ceee77a01f93.png?resizew=325)
(1)求k的值及△AOB的面积;
(2)点C在x轴上,若△ABC是以AB为腰的等腰三角形,直接写出点C的坐标;
(3)点M(3,0)在x轴上,若点P是直线AB上的一个动点,当△PBM的面积与△AOB的面积相等时,求点P的坐标.
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【推荐2】如图,在平面直角坐标系xOy中,一次函数y1=ax+b(a,b为常数,且a≠0)与反比例函数y2=
(m为常数,且n≠0)的图象交于点A(﹣3,1)、B(1,n).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/13/d1491943-4015-4324-a559-43feba31ac48.png?resizew=202)
(1)求反比例函数和一次函数的解析式;
(2)连结0A、OB,求△AOB的面积;
(3)直接写出当y1<y2<0时,自变量x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f7626c207a4dc82d4d59cb520c91e49.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/13/d1491943-4015-4324-a559-43feba31ac48.png?resizew=202)
(1)求反比例函数和一次函数的解析式;
(2)连结0A、OB,求△AOB的面积;
(3)直接写出当y1<y2<0时,自变量x的取值范围.
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【推荐3】如图,平面直角坐标下,直线
分别交x轴、y轴于A、B两点,点A的坐标为(1,0),∠ABO=30°,过点B的直线y=
x+k与x轴交于点C.
(1)求直线
的解析式及点C的坐标;
(2)点D在x轴上从C向点A以每秒1个单位长度的速度运动,运动时间为t秒(0<t<4),过点D分别作DE∥AB,DF∥BC,交BC、AB于点E、F,点G为EF的中点.
①判断四边形DEBF的形状并证明;
②t为何值时,线段DG的长最小?
(3)点P是y轴上的点,在坐标平面内是否存在点Q,使以A、B、P、Q为顶点的四边形是菱形?若存在,请直接写出Q点的坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)点D在x轴上从C向点A以每秒1个单位长度的速度运动,运动时间为t秒(0<t<4),过点D分别作DE∥AB,DF∥BC,交BC、AB于点E、F,点G为EF的中点.
①判断四边形DEBF的形状并证明;
②t为何值时,线段DG的长最小?
(3)点P是y轴上的点,在坐标平面内是否存在点Q,使以A、B、P、Q为顶点的四边形是菱形?若存在,请直接写出Q点的坐标;若不存在,说明理由.
![](https://img.xkw.com/dksih/QBM/2020/9/2/2540852479680512/2546882253889536/STEM/7d67775f4bf34915ac6a4acb254c2c27.png?resizew=191)
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【推荐1】如图,抛物线y=x2+bx+c经过点A(﹣4,8),B(1,﹣2),与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/2021/9/6/2802380198002688/2832564876804096/STEM/50b9c7899f4143f4b9901ebf8fd09192.png?resizew=357)
(1)求抛物线的表达式;
(2)M是抛物线上的动点,且在直线AB的下方,设点M的横坐标为m.
①如果△ABM的面积为整数,那么满足条件的M点有几个,请说明理由.
②当∠MCB=3∠OCB时,求m的值.
![](https://img.xkw.com/dksih/QBM/2021/9/6/2802380198002688/2832564876804096/STEM/50b9c7899f4143f4b9901ebf8fd09192.png?resizew=357)
(1)求抛物线的表达式;
(2)M是抛物线上的动点,且在直线AB的下方,设点M的横坐标为m.
①如果△ABM的面积为整数,那么满足条件的M点有几个,请说明理由.
②当∠MCB=3∠OCB时,求m的值.
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【推荐2】已知抛物线
经过点
.
的值;
(2)
为抛物线上两点,其中
.
(
)若
,且
两点均在该抛物线对称轴的左侧,求
的取值范围;
(
)如图,
为坐标原点,过
两点作
轴的垂线与线段
分别交于
两点.若四边形
为平行四边形,求四边形
周长的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb81c0659670d0030fafb47b2b94ce2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cbf9d011b61bf4addcbe0b87a134702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b579656abbbdc02de4ff765f0497dc6.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a14e8ed32ca08f63c9574fed8c68821e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cec12441802f71e803efaf2c62ee588.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4580cc037c0c760c728cdbb74a8154c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ad58997b9dc0b341c9af08f0cd1fbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0de82aff5049dce8a3d56291dc2ae4af.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971ab6567c156fee308640828a804415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17cb7a12bb8797615303fc20adb9f988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17cb7a12bb8797615303fc20adb9f988.png)
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【推荐1】如图,在平面直角坐标系中,已知抛物线
过
三点,点A的坐标是
,点C的坐标是
.
(1)求抛物线的解析式及顶点D的坐标;
(2)求以点A、点C及点D围成的
的面积;
(3)在抛物线上是否存在点P,使得
,若存在,请求出点P的横坐标.若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/623afc24f2227004b0e1b3922dfb954b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bd685943cf39f7945b31e42d6221788.png)
(1)求抛物线的解析式及顶点D的坐标;
(2)求以点A、点C及点D围成的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
(3)在抛物线上是否存在点P,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33dae1ee4db914a117cdb24d4b0285c4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/27/48c7ee10-6f96-4385-959f-acbb6cb1b09f.png?resizew=115)
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【推荐2】如图,在菱形ABCD中,
,连接BD.
(1)求BD的长;
(2)点E为线段BD上一动点(不与点B,D重合),点F在线段AD上一动点,且
.
①如图2,当
时,求四边形ABEF的面积;
②如图3,设
,四边形ABEF的面积为y,当x取何值时,y有最小值,并求出y的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bab78cd7ebb306542570671576c7ceae.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/23/e12dfa7a-2840-4c8b-bb7b-9870bb234813.png?resizew=449)
(1)求BD的长;
(2)点E为线段BD上一动点(不与点B,D重合),点F在线段AD上一动点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092b9a2601b5eb5129f82865d6e06ebf.png)
①如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f913298f0fae9f55377a8deab9f099dd.png)
②如图3,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c29bf5a05dd46f6e03dfd22c32f7ce1.png)
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【推荐3】如图,已知正比例函数和反比例函数的图象都经过点A(﹣3,﹣3).
(1)求正比例函数和反比例函数的表达式;
(2)把直线OA向上平移后与反比例函数的图象交于点B(﹣6,m),与x轴交于点C,求m的值和直线BC的表达式;
(3)在(2)的条件下,直线BC与y轴交于点D,求以点A,B,D为顶点的三角形的面积;
(4)在(3)的条件下,点A,B,D在二次函数的图象上,试判断该二次函数在第三象限内的图象上是否存在一点E,使四边形OECD的面积S1与四边形OABD的面积S满足:S1=
S?若存在,求点E的坐标;若不存在,请说明理由.
(1)求正比例函数和反比例函数的表达式;
(2)把直线OA向上平移后与反比例函数的图象交于点B(﹣6,m),与x轴交于点C,求m的值和直线BC的表达式;
(3)在(2)的条件下,直线BC与y轴交于点D,求以点A,B,D为顶点的三角形的面积;
(4)在(3)的条件下,点A,B,D在二次函数的图象上,试判断该二次函数在第三象限内的图象上是否存在一点E,使四边形OECD的面积S1与四边形OABD的面积S满足:S1=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/139e201f2295ed34d96183f7c467580f.png)
![](https://img.xkw.com/dksih/QBM/2018/9/4/2024977607229440/2025901042057216/STEM/bb79bad075d649a6bc1a4d3a5e87a076.png?resizew=164)
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【推荐1】在等腰直角三角形
中,
.点P为直线
上一个动点(点P不与点A,B重合),连接
,点D在直线
上,且
.过点P作
于点P,点D,E在直线
的异侧,且
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/12/f5ee8edc-3fc8-47a0-82a4-6521bbacb977.png?resizew=381)
(1)如图1,当点P在线段
上时,请依题意补全图形 1 ,并证明
;
(2)如图2,当点P在
的延长线上时,请依题意补全图 2 ,猜想
和
的位置关系和数量关系,并证明你的结论;
(3)如果点P在直线
上运动(点P不与点A,B重合),请直接写出线段
之间的数量关系(用等式表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ed2b331902d2da7a2b786c544b33f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c8a72acdef14452a6c62f2a60a15fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b05f56924b62dc1e2305d859543e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fcf0b08d002a21f5494032cf0d15440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/12/f5ee8edc-3fc8-47a0-82a4-6521bbacb977.png?resizew=381)
(1)如图1,当点P在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502fb8471c4eea54ce4accb3afb74362.png)
(2)如图2,当点P在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(3)如果点P在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b75f99f978afe97a1ff063d62ca64f27.png)
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解答题-证明题
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较难
(0.4)
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【推荐2】(1)如图1,将直角的顶点E放在正方形ABCD的对角线AC上,使角的一边交CD于点F,另一边交CB或其延长线于点G,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b44419b28cfe31122540411a9d726de2.png)
(2)如图2,将(1)中的“正方形ABCD”改成“矩形ABCD”,其他条件不变.若
,
,试求
的值;
(3)如图3,在(2)的条件下,将直角顶点E放在矩形ABCD的对角线交点,EF、EG分别交CD与CB于点F、G,且EC平分∠FEG.若AB=2,BC=4,求EG、EF的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b44419b28cfe31122540411a9d726de2.png)
(2)如图2,将(1)中的“正方形ABCD”改成“矩形ABCD”,其他条件不变.若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e7fa3aea72ccc36948a4a90f7368f71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bc9f0779b0ba2f9f97caf35c166ad24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a1d7c0674da6c5d184a384813b2a40.png)
(3)如图3,在(2)的条件下,将直角顶点E放在矩形ABCD的对角线交点,EF、EG分别交CD与CB于点F、G,且EC平分∠FEG.若AB=2,BC=4,求EG、EF的长.
![](https://img.xkw.com/dksih/QBM/2018/12/31/2108688300597248/2113008110911489/STEM/bcd9936caccb4f07b2a19d7a6045ac2d.png?resizew=567)
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