如图,抛物线
与x轴分别交于A,B两点(点A在点B的左侧),与y轴交于点C,若
且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/26/5fa9129c-d18c-462b-b7cf-212111125a17.png?resizew=147)
(1)求该抛物线的函数表达式;
(2)如图,点D是该抛物线的顶点,点
是第二象限内抛物线上的一个点,分别连接
.
①若
是直角三角形,且
时,求P点坐标;
②当
时,求P点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34c5f95e986b0862336fdcc845978997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311497849126f1aaf1da0ec75602eabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80bdb43651faadeb9290d3db2fb364b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/26/5fa9129c-d18c-462b-b7cf-212111125a17.png?resizew=147)
(1)求该抛物线的函数表达式;
(2)如图,点D是该抛物线的顶点,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b21872d8f6a518e0a2993ccf7a795ed2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a20fa4681774591c3cd3b04fbde02b8.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/296edbe33c143e819107aa0d2bf987b6.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5ef3eb3202c9e3b21d35a6be245326e.png)
2023·江苏无锡·模拟预测 查看更多[3]
2023年江苏省无锡市天一实验学校九年级中考数学模拟试题(已下线)黄金卷07-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷(江苏无锡专用)(已下线)2023年浙江省金华市中考数学真题变式题21-24题
更新时间:2023-03-23 16:23:52
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【推荐1】已知,在平面直角坐标系中,点O为坐标原点,抛物线
交x轴于A、B两点,交y轴于点C,
.
(1)如图1,求抛物线解析式;
(2)如图2,点E为第一象限抛物线上的点,连接BE,过点E作
于D,
,求
的面积;
(3)如图3,在(2)的条件下,连接BC交DE于点Q,点K是第四象限抛物线上的点,连接EK交BC于点M,交x轴于点N,
,过点K作直线
轴于点T,过点E作
轴,交直线KT于L,点F为抛物线对称轴右侧第一象限抛物线上一点,连接ET、LF,LF的延长线交印于点P,连接DP并延长交EL于点S,
,求点F坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa27f35a37526ec996c558b2abce01bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846a783e20e7ca049678c75550465213.png)
(1)如图1,求抛物线解析式;
(2)如图2,点E为第一象限抛物线上的点,连接BE,过点E作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b23a2060fe9f6f49237a5a7738d2da4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0332218c1b738af70cfb075e0caa1e28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
(3)如图3,在(2)的条件下,连接BC交DE于点Q,点K是第四象限抛物线上的点,连接EK交BC于点M,交x轴于点N,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a8db4bbbebd020e671e7500b0b3010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3727ae424cc873b898d345625adddd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/048993efcaae5e90e671f566557d8719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d290a76470ce5a77fad3cdf400051b05.png)
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【推荐2】如图1,已知抛物线
与直线
交于
,
两点,与
轴的另一个交点为A,点M是直线
上方抛物线的一动点,过点M作
轴,交
于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/23/42a31ed7-1391-4cf0-aed6-7c8db019ad99.png?resizew=387)
(1)求抛物线的解析式和直线
的解析式;
(2)当点E是
的三等分点时,求此时点M的坐标;
(3)如图2,直线
与抛物线交于A,F两点,
,若点Q是
轴上一点,且
,请直接写出点Q的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9c03447a29ec18a9dd8bd3ff6516a31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/313829ea28c4225039643b26f3e82bca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa8f1243f51b36c405e461705dd1d555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/23/42a31ed7-1391-4cf0-aed6-7c8db019ad99.png?resizew=387)
(1)求抛物线的解析式和直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)当点E是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
(3)如图2,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78bf643ef8b88c189c125525fddb3dc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a01a94a55527c31c45c0bc77058d25c.png)
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【推荐1】折纸大约起源于公元1世纪或者2世纪时的中国,6世纪时传入日本,再经由日本传到全世界.目前折纸与自然科学结合在一起,不仅成为建筑学院的教具,还发展出了折纸几何学.
【尝试】
(1)如图1所示,在
中,
,
,
,点E为
边上一动点,过点E作
交
于点D,将
沿着
折叠,使点B与点C重合,连接
,则
的长度为 _______ ;
【探究】
(2)如图2所示,在等腰
中,
,
,点E为
边上一动点,过点E作
交
于点D,将
沿着
折叠,使点B与点C重合,连接
,求
的长度;
【延伸】
(3)如图3所示,在等腰
中,
,
,点E为
边上一动点,点D为斜边
的中点,连接
,将
沿着
折叠,在点 E 的移动过程中若存在
与
的一边平行,请直接写出
的长度.
【尝试】
(1)如图1所示,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd657e48b15b9b54a55817e2c26b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/321370fe42bc1216902ea19fbd2a5979.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
【探究】
(2)如图2所示,在等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1be17e0a3e51cde1f50f384198e71e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08313da7b66283d2e0b3987f3e6761f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd657e48b15b9b54a55817e2c26b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/321370fe42bc1216902ea19fbd2a5979.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
【延伸】
(3)如图3所示,在等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209acf15985d1ea1ad86fc4a37e38c0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07fbad473c16df3ff62c1c6b37de6aa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
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【推荐2】已知:在正方形ABCD的边BC上任取一点F,连接AF,一条与AF垂直的直线l(垂足为点P)沿AF方向,从点A开始向下平移,交边AB于点E.
![](https://img.xkw.com/dksih/QBM/2022/5/9/2975841808269312/2977711874506752/STEM/e8e7fb5abd2b427d9895acca9f30f3fa.png?resizew=556)
(1)当直线l经过正方形ABCD的顶点D时,如图1所示.求证:AE=BF;
(2)当直线l经过AF的中点时,与对角线BD交于点Q,连接FQ,如图2所示.求∠AFQ的度数;
(3)直线l继续向下平移,当点P恰好落在对角线BD上时,交边CD于点G,如图3所示.设AB=2,BF=x,DG=y,求y与x之间的关系式.
![](https://img.xkw.com/dksih/QBM/2022/5/9/2975841808269312/2977711874506752/STEM/e8e7fb5abd2b427d9895acca9f30f3fa.png?resizew=556)
(1)当直线l经过正方形ABCD的顶点D时,如图1所示.求证:AE=BF;
(2)当直线l经过AF的中点时,与对角线BD交于点Q,连接FQ,如图2所示.求∠AFQ的度数;
(3)直线l继续向下平移,当点P恰好落在对角线BD上时,交边CD于点G,如图3所示.设AB=2,BF=x,DG=y,求y与x之间的关系式.
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【推荐1】如图,AB为⊙O的直径,C为⊙O上一点,∠ABC的平分线交⊙O于点D,DE⊥BC于点E.
(1)试判断DE与⊙O的位置关系,并说明理由;
(2)过点D作DF⊥AB于点F,若∠ABD=
,DF=3,求图中阴影部分的面积.
(1)试判断DE与⊙O的位置关系,并说明理由;
(2)过点D作DF⊥AB于点F,若∠ABD=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://img.xkw.com/dksih/QBM/2020/12/16/2615583264440320/2618508387614720/STEM/222527ed5793449f9a0606748ec0e71c.png?resizew=164)
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【推荐2】已知抛物线ykx24kx3kk0与x轴交于A、B两点(点A在点B的左边),与y轴交于点C,顶点为D.
(1)如图1,请求出A、B两点的坐标;
(2)点E为x轴下方抛物线ykx24kx3kk0上一动点.
①如图2,若k=1时,抛物线的对称轴DH交x轴于点H,直线AE交y轴于点M,直线BE交对称轴DH于点N,求MONH的值;
②如图3,若k2时,点F在x轴上方的抛物线上运动,连接EF交x轴于点G,且满足FBAEBA,当线段EF运动时,FGO的度数大小发生变化吗?若不变,请求出tanFGO的值;若变化,请说明理由.
![](https://img.xkw.com/dksih/QBM/2019/4/11/2179968565444608/2183723384905728/STEM/7112015ca42a4072bb372890fce2c2bd.png?resizew=182)
![](https://img.xkw.com/dksih/QBM/2019/4/11/2179968565444608/2183723384905728/STEM/bb2c35964310411ca8cb6bc2d82b37b0.png?resizew=167)
(1)如图1,请求出A、B两点的坐标;
(2)点E为x轴下方抛物线ykx24kx3kk0上一动点.
①如图2,若k=1时,抛物线的对称轴DH交x轴于点H,直线AE交y轴于点M,直线BE交对称轴DH于点N,求MONH的值;
②如图3,若k2时,点F在x轴上方的抛物线上运动,连接EF交x轴于点G,且满足FBAEBA,当线段EF运动时,FGO的度数大小发生变化吗?若不变,请求出tanFGO的值;若变化,请说明理由.
![](https://img.xkw.com/dksih/QBM/2019/4/11/2179968565444608/2183723384905728/STEM/7112015ca42a4072bb372890fce2c2bd.png?resizew=182)
![](https://img.xkw.com/dksih/QBM/2019/4/11/2179968565444608/2183723384905728/STEM/bb2c35964310411ca8cb6bc2d82b37b0.png?resizew=167)
![](https://img.xkw.com/dksih/QBM/2019/4/11/2179968565444608/2183723384905728/STEM/a78a6a2afcea40a395b7c8534190f3d8.png?resizew=151)
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【推荐1】如图,抛物线
与
轴分别相交于
,
两点.
(1)求抛物线的函数表达式
(2)点
在抛物线的对称轴上,且位于
轴的上方,将
沿直线
翻折得到
,点
恰好落在抛物线的对称轴上.若点
为对称轴右侧直线
下方抛物线上的一点,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ad1165a0382b9cb6b6aa2c1b70b7c6a.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/08ef03f452410ab19c6246567c427178.png)
(1)求抛物线的函数表达式
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f6bf45ecba77a2581e1142bd16bf8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74b07f6b9c651b09316bc0767b21bdb4.png)
![](https://img.xkw.com/dksih/QBM/2021/5/13/2720366910767104/2726708062822400/STEM/ed1a4da0-175b-42d0-b9d8-84af4e6fb9ae.png)
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【推荐2】已知,二次函数 y=(x+2)2 的图象与 x 轴交于点 A,与 y 轴交于点 B.
(1)求点 A、点 B 的坐标;
(2)求 S△AOB;
(3)求对称轴方程;
(4)在对称轴上是否存在一点P,使以 P,A,O,B 为顶点的四边形为平行四边形?若存在,求P点坐标;若不存在,请说明理由.
(1)求点 A、点 B 的坐标;
(2)求 S△AOB;
(3)求对称轴方程;
(4)在对称轴上是否存在一点P,使以 P,A,O,B 为顶点的四边形为平行四边形?若存在,求P点坐标;若不存在,请说明理由.
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