在平面直角坐标系中,抛物线
的顶点为N.
(1)图若抛物线过点
,求此抛物线相应的函数表达式;
![](https://img.xkw.com/dksih/QBM/2022/5/19/2982350987165696/2983234674491392/STEM/339993a3-1d63-4d24-9e5b-1bb73266e5ae.png?resizew=164)
(2)在(1)的条件下,若抛物线与y轴交于点B,连接AB,C为抛物线上一点,且位于线段AB的上方,过C作CD垂直x轴于点D交AB于点E,若
,求点C坐标;
(3)知点
,且无论k取何值,抛物线都经过定点H,当△MHN是以MH为直角边的三角形时,请求出此抛物线相应的函数表达式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b733feb12c7d32a63522f92256d196d4.png)
(1)图若抛物线过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7078a4e8e927c163c7f98e66759c9834.png)
![](https://img.xkw.com/dksih/QBM/2022/5/19/2982350987165696/2983234674491392/STEM/339993a3-1d63-4d24-9e5b-1bb73266e5ae.png?resizew=164)
(2)在(1)的条件下,若抛物线与y轴交于点B,连接AB,C为抛物线上一点,且位于线段AB的上方,过C作CD垂直x轴于点D交AB于点E,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f0605b1f23461e980f27ef18550676.png)
(3)知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8547f2b4e89b0ae1445bda02d46f0668.png)
![](https://img.xkw.com/dksih/QBM/2022/5/19/2982350987165696/2983234674491392/STEM/f0fcdb32-0820-46c2-8d28-6f5952db0b85.png?resizew=191)
2022·广东佛山·二模 查看更多[3]
2022年广东省佛山市华英学校九年级数学第二次模拟试题2022年下学期广东省佛山市禅城区华英中学中考数学二模试题(已下线)第18讲 二次函数中特殊几何图形存在性(探究性)问题-【暑假自学课】2022年新九年级数学暑假精品课(人教版)
更新时间:2022-05-20 06:29:23
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【推荐1】如图,在平面直角坐标系中,直线
:
与x轴交于点A,直线
与x轴交于点
,与直线
交于点
,动点M在直线
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/24/c0aaa1b1-7e98-46a1-86a7-d72ca43e985c.png?resizew=140)
(1)求m的值及直线
的表达式;
(2)若经过点M作y轴的平行线与直线
相交于点N,当
时,求此时点M的坐标;
(3)在(2)的条件下,请直接给出以O,C,M,N为顶点的四边形的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c608def11fa0e2b34f05592ef1d11fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15dae32953862fc6fbfb29645894a50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcddd9b0689eceec5d503240facee044.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/24/c0aaa1b1-7e98-46a1-86a7-d72ca43e985c.png?resizew=140)
(1)求m的值及直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
(2)若经过点M作y轴的平行线与直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f537e7bd7742eb543279795b98e83157.png)
(3)在(2)的条件下,请直接给出以O,C,M,N为顶点的四边形的面积.
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【推荐2】如图,在平面直角坐标系中,点A、C的坐标分别为
,(4,1),以
,
为邻边作平行四边形
,一次函数
(k、b为常数,且
)的图象过点B.
(1)点B的坐标为 .
(2)求用含k的代数式表示b.
(3)当一次函数
的图象将平行四边形
分成面积相等的两部分时,求k的值.
(4)直接写出一次函数
的图象与平行四边形
的边只有两个公共点时k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/148d97803c3b16893ced41ad5cd9aba4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c80c26a794a844127aae7dee87c93b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/27/75e60ceb-2ecf-468b-a24e-de2e154d6e51.png?resizew=176)
(1)点B的坐标为 .
(2)求用含k的代数式表示b.
(3)当一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
(4)直接写出一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
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【推荐1】如图1,直线
:
与
轴、
轴分别交于
、
两点,二次函数
的图像经过点
,交
轴于点
.
![](https://img.xkw.com/dksih/QBM/2021/5/8/2716620484075520/2720999503962112/STEM/10e9da13-a8ff-435c-a4d4-8605f53fac4a.png)
(1)求该二次函数的表达式;
(2)已知点
是抛物线上的一个动点,经过点
作
轴的垂线
,交直线
于点
,过点
作
,垂足为
,连接
.设点
的横坐标为
.
①若
,求
的值.
②如图2,将
绕点
顺时针旋转得到
,且旋转角
.当点
的对应点
落在坐标轴上时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c6b28d3832f748441f80e9880bfa656.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cb84fda815b075c9b405ec761c5fea0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/2021/5/8/2716620484075520/2720999503962112/STEM/10e9da13-a8ff-435c-a4d4-8605f53fac4a.png)
(1)求该二次函数的表达式;
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9722858b7d3c08bad813a0d93f2a0575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034360dbf31d3e19612346bbd545299c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
②如图2,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07db7d83c3f6bcd69a2850df43e48b5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36aae92d2237fb69eb01f5f2ec624b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e99bab36fb95985d8fa32c52867d368.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da1eb60ecac9b22ed0d2c856dfbb4d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】已知抛物线
经过点
、
,与
轴的另一个交点为
,点
在线段
上,过点
作
轴于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/542a6aa0-d61a-4f6f-a988-5d353facce2b.png?resizew=421)
(1)求抛物线的解析式;
(2)以
为边在其左侧作等腰直角三角形
,问点D能否落在抛物线上,若能,求出点D的坐标,若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c901125845dd884b6de74b8e161451a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86bfdb562fbd129ffc213acdfa2f9327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/702f3327d94250be44373b3eb26c7b0f.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24624dffd30b66a5e4de57362b32b2a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/542a6aa0-d61a-4f6f-a988-5d353facce2b.png?resizew=421)
(1)求抛物线的解析式;
(2)以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
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【推荐1】在平面直角坐标系中,抛物线
的对称轴为直线
,顶点为A.将抛物线
沿y轴对称,得到抛物线
,顶点为B.
![](https://img.xkw.com/dksih/QBM/2021/1/7/2631198879072256/2634026817429504/STEM/4fb52f77-2d0b-4f16-bca9-bc93ca8e36ab.png?resizew=232)
(1)求a的值.
(2)求抛物线
的表达式.
(3)请问在抛物线
或
上是否存在点P,使以点P、A、B为顶点的三角形是直角三角形?若存在,求出点P的坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5a4c61b598a759d60f2cebefbbffd1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172722d11ea7e01411fa06dbb82f46ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbd49bf20f987c05b4d36e31549075c.png)
![](https://img.xkw.com/dksih/QBM/2021/1/7/2631198879072256/2634026817429504/STEM/4fb52f77-2d0b-4f16-bca9-bc93ca8e36ab.png?resizew=232)
(1)求a的值.
(2)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbd49bf20f987c05b4d36e31549075c.png)
(3)请问在抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172722d11ea7e01411fa06dbb82f46ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbd49bf20f987c05b4d36e31549075c.png)
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【推荐2】如图,在平面直角坐标系中,抛物线
与x轴交于点A(-1,0)、B(3,0)两点,直线y=x-2与x轴交于点D,与y轴交于点C.点P是x轴下方的抛物线上一动点,过点P作PF⊥x轴于点F,交直线CD于点E.设点P的横坐标为m.
![](https://img.xkw.com/dksih/QBM/2016/8/4/1574226165456896/1574226171101184/STEM/b81b933f9a3c4c42a0949cc01218a46a.png?resizew=196)
(1)求抛物线的解析式:
(2)若PE=3EF,求m的值;
(3)连接PC,是否存在点P,使△PCE为等腰直角三角形?若存在,请直接写出相应的点P的横坐标m的值;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2016/8/4/1574226165456896/1574226171101184/STEM/1faea425dd0748c0956047bb98017629.png?resizew=107)
![](https://img.xkw.com/dksih/QBM/2016/8/4/1574226165456896/1574226171101184/STEM/b81b933f9a3c4c42a0949cc01218a46a.png?resizew=196)
(1)求抛物线的解析式:
(2)若PE=3EF,求m的值;
(3)连接PC,是否存在点P,使△PCE为等腰直角三角形?若存在,请直接写出相应的点P的横坐标m的值;若不存在,请说明理由.
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