在平面直角坐标系中,二次函数
的图像经过点
和点
,点E是直线
的图像与二次函数图像在第一象限内的交点.
(1)求二次函数的解析式;
(2)如图①,若点M是二次函数图像上的点,且在直线
的上方,连接
,求四边形
面积的最大值;
(3)如图②,经过A、B、C三点的圆交y轴于点F(点F与点C不重合),请直接写出点F的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7811e15e5b009ef52ba00b430916b1bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5558ffa6dc28d437c0467c7f361d444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03be81ffeff5b9f96bcb7c1cb410f3ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a99e89fe956250b0da69a70d1644c42.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/21/fc3e0069-9ae7-4c43-a62b-b33564ebe83b.png?resizew=368)
(1)求二次函数的解析式;
(2)如图①,若点M是二次函数图像上的点,且在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/242134d849cd2b6d49f81f95478c6269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93c9b0f6f27c877d9a48578e5ca9747f.png)
(3)如图②,经过A、B、C三点的圆交y轴于点F(点F与点C不重合),请直接写出点F的坐标.
更新时间:2023-10-12 22:48:13
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解答题-问答题
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【推荐1】在平面直角坐标系中,已知抛物线
.
(1)求抛物线的顶点坐标;
(2)已知点
,
,若抛物线与线段AB恰有一个公共点,求a的取值范围;
(3)点
在抛物线
上,点
在一次函数
的图象上,若对于任意
,总存在
,使得
,直接写出a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3f6e5dbdc6fbe44b8434a029f3174c.png)
(1)求抛物线的顶点坐标;
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c80eabaf101288433b3b9e92a4805a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/266c42a10c13c00114ae371b2d9f728d.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d6f5adf13b4214666292dd64b947741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3f6e5dbdc6fbe44b8434a029f3174c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af405a054bfe7fb7ce40e48d816467e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf5115ef81889507fcbf36deaa968a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bf508f1cfec34a3130c5d8526c45b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24cd2fe62ffe3caa1c6f7976851c9dc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df86b0da538701c08fb214608e062372.png)
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【推荐2】在平面直角坐标系
中,
是拋物线
上任意两点,设抛物线的对称轴为直线
.
(1)若抛物线经过点
,求
的值;
(2)若对于
,都有
,求
的取值范围;
(3)若对于
,存在
,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971013c0d0f829ce7b61718b9e3830f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3904854458df75b91359320ccc6c669a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4e8823d3f368ab5d123747b8535f50a.png)
(1)若抛物线经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f436117499e8ba9cb034e2704fc0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
(2)若对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6734a0525a1b5ccc13777bf5cc5117bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f99df1a7b58018125b99578b779342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
(3)若对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca112f5448ebb98cce82bb4be6f60f31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac67e9a909472ab852d38d2ec66a1e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
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【推荐1】正方形ABCD的四个顶点都在
上,点P是劣弧
上一点(点P与点C,D不重合),连接PA,PD.
![](https://img.xkw.com/dksih/QBM/2022/1/16/2902061306183680/2956376237236224/STEM/c7ebd2ae-d7b6-4453-bf71-64286aac5bc0.png?resizew=341)
(1)如图1,求
的度数.
(2)如图2,连接PB.在线段PB上取点M,使得
,过点M作
交PA于点N.记PA,PB与边CD交于点E,F.
①求证:
.
②若
,
,求正方形ABCD的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bb3820bab977db734f4335e4fde720.png)
![](https://img.xkw.com/dksih/QBM/2022/1/16/2902061306183680/2956376237236224/STEM/c7ebd2ae-d7b6-4453-bf71-64286aac5bc0.png?resizew=341)
(1)如图1,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42fa5dff377ef08e416547def489def0.png)
(2)如图2,连接PB.在线段PB上取点M,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4714e33baa77ada39336c475a4be1cbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31307b00524e461b0ad8dfbcdf24bacf.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f6127a383f74026c1c900098ba80886.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6609cc372831939ad4beb3770b0b0ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9113ae1ee602a3dadc19b8c65b38f4b0.png)
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【推荐2】如图,在中,
,垂足为D,E为
的中点,
,垂足为F,
交
于点G.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ea47244f85807f2fdf3f22061c38fa.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d16e4380bcbea7b5a8697c330a88e3e8.png)
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【推荐1】如图1,正方形
的边长为5,点E为正方形
边上一动点,过点B作
于点P,将
绕点A逆时针旋转90°得
,延长
交
于点F,连结
.
(1)判断四边形的
的形状,并说明理由;
(2)若
,求
;
(3)如图2,若点E恰好为
的中点时,请判断
与
的数量关系,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59fb768fc63e1aabddbfb2b3e7c5b51a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af2cc5f8cec8c498aa12c99c04e1c97d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1cab2a5ce9084a174e28cf03bb0e7ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc063cdcf722f07a1aa57be04edd416d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
(1)判断四边形的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43cae5a294aefb478de5532fea184ead.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70abed7faf55deb24162255c5ad59577.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5077c01a7ce3ed12ced582dd3380c8f.png)
(3)如图2,若点E恰好为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/22/6a81bc2e-f642-494d-9b9a-cec37c86b85b.png?resizew=409)
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【推荐2】已知二次函数经过点A(﹣3,0)、B(1,0)、C(0,3).
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923424532045824/2926966976118784/STEM/e7604dcf-672d-4324-99a6-00e3e85147e6.png?resizew=199)
(1)求该抛物线解析式;
(2)如图1,点M为抛物线上第二象限内一动点,BM交y轴于点N,当BM将四边形ABCM的面积分为1:2两部分时,求点M的坐标;
(3)如图2,点P为对称轴上D点下方一动点,点Q为直线y=x第一象限上的动点,且DP=
OQ,求BP+
BQ的最小值并求此时点P的坐标.
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923424532045824/2926966976118784/STEM/c265615d-d40f-4133-a284-fae79f44c096.png?resizew=198)
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923424532045824/2926966976118784/STEM/e7604dcf-672d-4324-99a6-00e3e85147e6.png?resizew=199)
(1)求该抛物线解析式;
(2)如图1,点M为抛物线上第二象限内一动点,BM交y轴于点N,当BM将四边形ABCM的面积分为1:2两部分时,求点M的坐标;
(3)如图2,点P为对称轴上D点下方一动点,点Q为直线y=x第一象限上的动点,且DP=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
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解题方法
【推荐3】平面直角坐标系
中,给出如下定义:对于图形G及图形G外一点P,若图形G上存在一点M,满足PM=2,且使点P绕点M顺时针旋转90°后得到的对应点P’在这个图形G上,则称点P为图形G的“2旋转点”.
已知点A(-1,0),B(-1,2),C(2,-2),D(0,3),E(2,2),F(3,0)
(1)①判断:点B________线段AF的“2旋转点”(填“是”或“不是”);
②点C,D,E中,是线段AF的“2旋转点”的有_________;
(2)已知直线
,若直线l上存在线段AF的“2旋转点”,求b的取值范围;
(3)⊙T是以点T(t,0)为圆心,
为半径的一个圆,已知在线段AD上存在这个圆的“2旋转点”, 直接写出t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
已知点A(-1,0),B(-1,2),C(2,-2),D(0,3),E(2,2),F(3,0)
(1)①判断:点B________线段AF的“2旋转点”(填“是”或“不是”);
②点C,D,E中,是线段AF的“2旋转点”的有_________;
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56ecf83e6103c89baef902ff6405734.png)
(3)⊙T是以点T(t,0)为圆心,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/25/8d4d94fa-b553-4a0a-ad92-06ae5d058944.png?resizew=217)
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【推荐1】如图,已知直线
:
与抛物线
相交于点
、点B,点B在x轴上,且对于任意实数x,不等式
恒成立.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/12/78a7b94e-07e7-48b8-980a-713c30e2dc58.png?resizew=353)
(1)求该抛物线及直线AB的解析式;
(2)点M为该抛物线上的一点,过点M作
轴于点N,过点A作
轴于点H,当以点M、N、B为顶点的三角形与
相似,直接写出满足条件的全部点M的横坐标,并选取其中两种情况写出解答过程 ;
(3)试问,在抛物线
上是否存在点
,使得
的面积等于
的面积的2倍?如果存在,请直接写出点
的坐标,如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/823693db8b7d909a9140aa92103aafed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f23013adb969a54c5ada2f510a008d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97bb8d03db5d3ca0353b30b4520e4c0a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/12/78a7b94e-07e7-48b8-980a-713c30e2dc58.png?resizew=353)
(1)求该抛物线及直线AB的解析式;
(2)点M为该抛物线上的一点,过点M作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52cbeb9b1c1d637b903cf3e5c7f730f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7277dcfb480720f2f37413cb0d34d09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94f1a0b2c74ec67493fbbcfb97173b46.png)
(3)试问,在抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/823693db8b7d909a9140aa92103aafed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e8c7968d57d2a20065a7cb15c9b4eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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【推荐2】在直角坐标系中,
与
轴交于
两点,点
绕点
顺时针旋转90°后的对应点
在此抛物线上,点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/7230383e-7d2d-4e12-8807-628c73c9d994.png?resizew=248)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/9c2fe75d-c26b-4bc7-8bd6-7ce24739f80f.png?resizew=280)
(1)求抛物线解析式
(2)如图1,点
是线段
上一动点,作矩形
,使
在
上,
在
上,设线段
的长为
,求矩形
的面积
与
的函数关系式,并求
的最大值.
(3)如图2,在(1)的抛物线上是否存在两个点
,使以
为顶点的四边形是平行四边形,若存在,求出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a504fc5435bfb7e70ade3c5b09e93567.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e1ae4eb7c1be382c68d70a725e69fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a08092ea1dbc65fe683842acbdde8ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/7230383e-7d2d-4e12-8807-628c73c9d994.png?resizew=248)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/9c2fe75d-c26b-4bc7-8bd6-7ce24739f80f.png?resizew=280)
(1)求抛物线解析式
(2)如图1,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c43d201c632f52d01d97a5a206e4dcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d154c7125759617d44e689ee459c670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65d54bf5a4dfca42249dc87796696e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c43d201c632f52d01d97a5a206e4dcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(3)如图2,在(1)的抛物线上是否存在两个点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31ea3085fa1580875b1a20610d33b481.png)
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