如图,抛物线
与y轴交于点
,与x轴交于点A,B,且B点的坐标为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/22c12f12-13ec-4ff3-9273-0a6dbcdf529a.png?resizew=154)
(1)求该抛物线的解析式.
(2)若点P是
上的一动点,过点P作
,交
于E,连接
,求
面积的最大值.
(3)若点D为
的中点,点M是线段
上一点,且
为等腰三角形,求M点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b6d9add089706118dfc04ab716c302c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51b5288ad85ce1ff24d0b4053a4869ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c0573e2af8a0dc8c6a1c0af067a324f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/22c12f12-13ec-4ff3-9273-0a6dbcdf529a.png?resizew=154)
(1)求该抛物线的解析式.
(2)若点P是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d60f55c585f1b455027202684b13e7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f944f78358763be992bb3d55fff12f2.png)
(3)若点D为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2472125b18dc5f831b59c0acb0e488f4.png)
更新时间:2024-02-22 15:41:19
|
相似题推荐
解答题-作图题
|
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【推荐1】在平面直角坐标系xOy中,对于抛物线
,定义直线
为其伴随直线,点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
为其伴随点.特别的,设抛物线
与其伴随直线
交于
、
两点(点
在点
的左侧).
![](https://img.xkw.com/dksih/QBM/2022/2/25/2924150104842240/2963522706718720/STEM/1e90bfa4-e9b7-4207-bd60-9b7c196123a3.png?resizew=193)
(1)对于抛物线
,求出
、
两点坐标;
(2)①当点
的坐标为
,点
的坐标为
时,求伴随点
的坐标,
②若第①题中的抛物线
如图所示,请在所给图中画出其伴随直线,并标出点
、点
的位置;
(3)设抛物线
的对称轴与
轴交于点
,其伴随直线交
轴于点
,伴随点
,点
的坐标为
,且
,若
,求抛物线的解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53be61cd85ec86aabd164cae0265246b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e136e7637543c8ae92c8dcd55b31924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30277e0be448b4955903e81e8795e45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53be61cd85ec86aabd164cae0265246b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e136e7637543c8ae92c8dcd55b31924.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/2022/2/25/2924150104842240/2963522706718720/STEM/1e90bfa4-e9b7-4207-bd60-9b7c196123a3.png?resizew=193)
(1)对于抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/572f286fb45b2757af63569ae0bc2e99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)①当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95fcd639f88f4ff3199b584c2988e052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ae172cdddff9fc497f9ccabc230691b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
②若第①题中的抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53be61cd85ec86aabd164cae0265246b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(3)设抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53be61cd85ec86aabd164cae0265246b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd0a7f9ee3c6ccaea8dd3d5ad042e5f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96b0c41f8695cc909dd9395ef0726cb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ec7520386bdc907f84c4802e74111f5.png)
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名校
【推荐2】如图1,抛物线
(a,b,c为常数,且
)与坐标轴分别交于点
和点C.
![](https://img.xkw.com/dksih/QBM/2021/12/22/2877759813959680/2879997363412992/STEM/44d91b74-289b-4ffc-838c-8dba2ddba69f.png?resizew=553)
(1)求出a与c的数量关系式;
(2)如图2,点D是
内的一点,当
取得最小值
时,求出此时该抛物线的解析式;
(3)如图3,在(2)中的抛物线与直线
交于E,F两点,与直线
交于M,N两点,且
,点P,Q分别是
、
的中点,求证:直线
必定经过一个定点,并求出该定点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3852af5403beb73b6be6088bdf0aa8.png)
![](https://img.xkw.com/dksih/QBM/2021/12/22/2877759813959680/2879997363412992/STEM/44d91b74-289b-4ffc-838c-8dba2ddba69f.png?resizew=553)
(1)求出a与c的数量关系式;
(2)如图2,点D是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a26133e76731fde347055a8e2293b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3f31bb5a9bcde13d2542f4858e6df64.png)
(3)如图3,在(2)中的抛物线与直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d143e97f7cbc752007dcbf0dbb726a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b03dbbdf204c9f4d03c086f4186e3ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d4cc51d393a94365f7008de5eae8879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
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【推荐1】已知抛物线
:
交
轴于
,
两点(点
在点
的左侧),且
;抛物线
:
与
交于点
和点
.
(1)求抛物线
,
的解析式;
(2)直线
轴,交
轴于点
,与
,
分别相交于点
,
,当
时,求线段
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7b8b4980220331035198561cf4060c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22b7cc809b4dd039a31a015645ba09bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbfa199dae4e01b4899001ab25d9cfd5.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf20f734ac54ab0eec2e1c170a3a24f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84bfec4efcc9f0e656d6864daaaef55d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94f201e1275f9c035e7944e1a800c56f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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【推荐2】已知二次函数的图象经过原点
和点
,其中
.
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aeb9a94e392f6759b18abed89aacc5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b53b86bd516400d6fa7dabb3603f31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b334dafda377c3db77647c8cf1e95f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5908da764a876b13a321d5317388f00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a153fb242b6005f5726fbf7093ab49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b837fd9c52f60bfb3b6852733abc790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐1】如图,在平面直角坐标系xOy中,抛物线y=﹣x2+bx+3与x轴和y轴的正半轴分别交于A、B两点,且OA=OB,抛物线的顶点为M,联结AB、AM.
(1)求这条抛物线的表达式和点M的坐标;
(2)求sin∠BAM的值;
(3)如果Q是线段OB上一点,满足∠MAQ=45°,求点Q的坐标.
(1)求这条抛物线的表达式和点M的坐标;
(2)求sin∠BAM的值;
(3)如果Q是线段OB上一点,满足∠MAQ=45°,求点Q的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/7ca4c8d6-796d-4796-ad5d-f068122e0f9c.png?resizew=180)
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【推荐2】如图,已知二次函数
的图象交
轴于点
,交y轴于点C.
(1)求这个二次函数的表达式;
(2)点
是直线
下方抛物线上的一动点,求
面积的最大值;
(3)直线
(不经过点
)分别交直线
和抛物线于点
,当
是等腰三角形时,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a1b01c1a6d9a929a4e1d0d532ca8f5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/467389c12fc0e0631782ddb4ca3854cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/9/d78f51c5-3736-4886-a963-9b553310fa10.png?resizew=142)
(1)求这个二次函数的表达式;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/357265c532428e886a643e8e653eec9e.png)
(3)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36d71f015144ffaf1faec94a259b4a06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d0469336f71edd52dc9148c67db052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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真题
【推荐1】已知直线y=kx+3(k<0)分别交x轴、y轴于A、B两点,线段OA上有一动点P由原点O向点A运动,速度为每秒1个单位长度,过点P作x轴的垂线交直线AB于点C,设运动时间为t秒.
(1)当k=﹣1时,线段OA上另有一动点Q由点A向点O运动,它与点P以相同速度同时出发,当点P到达点A时两点同时停止运动(如图1).
①直接写出t=1秒时C、Q两点的坐标;
②若以Q、C、A为顶点的三角形与△AOB相似,求t的值.
(2)当
时,设以C为顶点的抛物线y=(x+m)2+n与直线AB的另一交点为D(如图2),
①求CD的长;
②设△COD的OC边上的高为h,当t为何值时,h的值最大?
(1)当k=﹣1时,线段OA上另有一动点Q由点A向点O运动,它与点P以相同速度同时出发,当点P到达点A时两点同时停止运动(如图1).
①直接写出t=1秒时C、Q两点的坐标;
②若以Q、C、A为顶点的三角形与△AOB相似,求t的值.
(2)当
![](https://img.xkw.com/dksih/QBM/2011/7/26/1573228124979200/1573228220735488/STEM/151ac1e87d924a18af387b073027083c.png)
①求CD的长;
②设△COD的OC边上的高为h,当t为何值时,h的值最大?
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/26/bab354ec-ae42-4d14-928e-522c597d9112.png?resizew=380)
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【推荐2】如图,直线
与x轴交于点A,与y轴交于点B,把△AOB沿y轴翻折,点A落到点C,过点B的抛物线
与直线BC交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/8/ac942bb7-2aa1-4112-b888-cbaf28bf5523.png?resizew=180)
(1)求直线BD和抛物线对应的函数解析式;
(2)在抛物线对称轴上求一点P的坐标,使△ABP的周长最小;
(3)在第一象限内的抛物线上,是否存在一点M,作MN垂直于x轴,垂足为点N,使得以M,O,N为顶点的三角形与△BOC相似?若存在,求出点M的坐标;若不存在,请说明理由.
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(1)求直线BD和抛物线对应的函数解析式;
(2)在抛物线对称轴上求一点P的坐标,使△ABP的周长最小;
(3)在第一象限内的抛物线上,是否存在一点M,作MN垂直于x轴,垂足为点N,使得以M,O,N为顶点的三角形与△BOC相似?若存在,求出点M的坐标;若不存在,请说明理由.
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