如图1,在平面直角坐标系中,抛物线
与x轴交
,
两点,与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/55dba0db-c2cd-4bdb-8742-b8ac44402ff4.png?resizew=239)
(1)求二次函数解析式;
(2)如图,抛物线对称轴与x轴交于点K,与线段
交于点M,点R在对称轴上,其纵坐标为12,连接
,已知点N为线段
上一动点,连接
,将
沿
翻折到
.
①当
的中点G落在抛物线上时,直接写出点G的坐标;
②当
与
重叠部分(如图中的
)为直角三角形时,求出此时点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/644111e525e65c1c96d88fc0947558d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/463b1ece0041bde1f0c14d9a8b295408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac272607ec32d9bd8cbb8ac5aa0c1741.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/55dba0db-c2cd-4bdb-8742-b8ac44402ff4.png?resizew=239)
(1)求二次函数解析式;
(2)如图,抛物线对称轴与x轴交于点K,与线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca3bd41676f6b69acac00a292fe134cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca3bd41676f6b69acac00a292fe134cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d0469336f71edd52dc9148c67db052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18d0c8daf65782bd3081769d5760de4.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14bc9983f123701604ea131508334e15.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18d0c8daf65782bd3081769d5760de4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfc59f6d9b481dadc8a697720fd89fe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed283a253b61df01f2a1cdc0cd8003f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
更新时间:2024-03-24 18:09:09
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相似题推荐
解答题-问答题
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(0.4)
【推荐1】抛物线
经过点
、
.
(1)求这条抛物线的函数解析式.
(2)当
时,函数
有最大值为
,求
的值.
(3)抛物线上有一点
,点
的横坐标为
,另有点
、
,以
为边作矩形
,设抛物线的顶点为
.
①连结
,若
的面积是
的面积
倍,求
的值.
②抛物线的对称轴上有一点
,且点
的纵坐标为
,连接
,线段
绕点
顺时针旋转
得线段
,以
为边作正方形
,若正方形
与矩形
重合部分的图形周长为
,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7908e8e2ca67ad0f739860222423950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d8350efd6636002f417d721fc87a126.png)
(1)求这条抛物线的函数解析式.
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18259968df2972ca63c352466215b17f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(3)抛物线上有一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eabba447320cdc8b308cc64ebd362810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee7998d3e2753cbe065cca7984552f9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3355e2fa0ac6c675f02ee36c3ced4f2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
①连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c65e076c80a2eb5946bf715ec7fb34c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03b465c5d8a5861b7b130e56dde8b1ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
②抛物线的对称轴上有一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737565094df39b312cfe96c6eec8961.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d58f9019097bd05037aefd5c322916.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b7e602302dd7b70f997898c4172cbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/856c8fca99cfb17d4ac1e84a9a6f0f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/856c8fca99cfb17d4ac1e84a9a6f0f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】已知抛物线
过定点A.
(1)求定点A的坐标;
(2)若抛物线过点
,已知点
,
,在抛物线对称轴上找一点
,使
的值最小,求点
的坐标.
(3)在(2)的条件下,请问抛物线上是否存在一点
,使
的值最小,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/c1068f76b6e4eb57da7bed17652aba47.png)
(1)求定点A的坐标;
(2)若抛物线过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/109c83e53bcf1a375fd3901ccf48c4eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8797fc4a235dd9be9e5af539aca37e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf3a4a83e119da0f8e98115ffb3cb402.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(3)在(2)的条件下,请问抛物线上是否存在一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aafa53cf6a7ceb29dc3d80a2936c3e9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
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【推荐1】在平面直角坐标系xOy中,若点P和点
关于y轴对称,点
和点
关于直线l对称,则称点
是点P关于y轴、直线l的二次对称点.如图所示,
的半径为1,若
上存在点M,使得点
是点M关于y轴,直线
的二次对称点,且点
在射线
上,求b的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da895d8bd043625a0839128252130d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/811b41e248cb1cfdc3c3c3e3d773507a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da895d8bd043625a0839128252130d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/301e1f7d489e1794d5ecd75ed33b47e8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/17/7eb4c806-cdc9-433f-88a2-db5904669c05.png?resizew=258)
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【推荐2】在平面直角坐标系
中,我们给出如下定义:将图形M绕直线
上某一点P顺时针旋转
,再关于直线
对称,得到图形N,我们称图形N为图形M关于点P的二次关联图形.
已知点
.
(1)若点P的坐标是
,直接写出点A关于点P的二次关联图形的坐标________;
(2)若点A 关于点P的二次关联图形与点A重合,求点P的坐标(直接写出结果即可);
(3)已知
的半径为1,点A关于点P的二次关联图形在
上且不与点A重合.
若线段
,其关于点P的二次关联图形上的任意一点都在
及其内部,求此时 P点坐标及点B的纵坐标
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/383f12cb70ca55eba4ff012771dbfa9d.png)
(1)若点P的坐标是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c3a2f5b0702ea9fbb9dc8904579737.png)
(2)若点A 关于点P的二次关联图形与点A重合,求点P的坐标(直接写出结果即可);
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
若线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53eeee95f185a90a266b7cdb3e467b5c.png)
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【推荐1】如图1,已知四边形
内接于
,且
为直径.作
交
于点E,交
于点F.
;
(2)若
,
,求半径r;
(3)如图2,连接
并延长交
于点G,交
于点H.若
,
.
①求
;
②连接
,设
,用含x的式子表示
的长.(直接写出答案)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6095bae4840bfa80f2468f94b2002d7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fbee06d305abf6692125513dc3757f9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c625fdf46ab9608a8c1c5211c6f914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
(3)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3bc0cc876a60c8cbdccc6a9a0b5b993.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae013963bc3dff7ba7db40a11e43cb14.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151710f8cc9d5961f5b5e43391af25c2.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deab30125e09b58dbd451fd2633ff9e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
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【推荐2】如图,AB为⊙O直径,C、D为⊙O上不同于A、B的两点,∠ABD=2∠BAC,连接CD.过点C作CE⊥DB,垂足为E,直线AB与CE相交于F点.
(1)求证:CF为⊙O的切线;
(2)当BF=5,
时,求BD的长.
(1)求证:CF为⊙O的切线;
(2)当BF=5,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5239826fca7bee4cab3a5a486cecb7f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/0da63c35-862c-4945-b4e6-cf796b9b2dab.png?resizew=184)
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【推荐1】如图,已知抛物线
,与
轴交于点
和点
,与
轴交于点
.
(2)如图1,点P是第一象限内抛物线上一动点,连接
、
、
,设点P的横坐标为t.当t为何值时,
是以点
为直角顶点的直角三角形;
(3)如图2,过抛物线顶点
作
轴于
,若
是
轴上一动点,
是线段
上一点,若
,请求出实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/266c97da6fdbfbc2d06e9f480286f566.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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)
(2)如图1,点P是第一象限内抛物线上一动点,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(3)如图2,过抛物线顶点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf783d3172debc69f963495e5bff78d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8649ce18c628d0e03e72cef541f8284f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc456ed600573a7278616d3632469381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】如图,已知抛物线与x轴交于A(−1,0)、B(3,0)两点,与y轴交于点C(0,3).
(1)该抛物线的对称轴是直线___________,
(2)求抛物线的解析式;
(3)设抛物线的顶点为D,在其对称轴的右侧的抛物线上是否存在点P,使得△PDC是等腰三角形?若存在,求出符合条件的点P的坐标;若不存在,请说明理由:
![](https://img.xkw.com/dksih/QBM/2019/11/3/2325846777520128/2327522241814528/STEM/2ef73ab51e9e44f39829d19c533d471f.png?resizew=205)
(1)该抛物线的对称轴是直线___________,
(2)求抛物线的解析式;
(3)设抛物线的顶点为D,在其对称轴的右侧的抛物线上是否存在点P,使得△PDC是等腰三角形?若存在,求出符合条件的点P的坐标;若不存在,请说明理由:
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