如图,抛物线
与
轴交于点
和点
,与
轴交于点
,其对称轴
为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/8/a6c5dd4e-d080-407f-b40d-03de63b05cae.png?resizew=195)
(1)求抛物线的解析式;
(2)若动点
在第二象限内的抛物线上,动点
在对称轴
上.
当
,且
时,求此时点
的坐标;
当四边形
的面积最大时,求四边形
面积的最大值及此时点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.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/ddbb898663f98b8400a897913b4d3102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850e01debd266a398b597a1876dbb3ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/8/a6c5dd4e-d080-407f-b40d-03de63b05cae.png?resizew=195)
(1)求抛物线的解析式;
(2)若动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2404be62c33b69eb8b5bac6846554ebc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f71453b7c515427c4792191b937da23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a351136b18bc7d3bd5122332772ab23b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a351136b18bc7d3bd5122332772ab23b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
更新时间:2024-03-09 13:28:24
|
相似题推荐
解答题-问答题
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(0.4)
【推荐1】如图1,在平面直角坐标系
中,已知抛物线
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/f52dbb18-22c6-4315-a992-ca02dcb3313d.png?resizew=197)
(1)若抛物线过点
,求出抛物线的解析式;
(2)当
时,
的最小值是
,求
时,
的最大值;
(3)已知直线
与抛物线
存在两个交点,若两交点到
轴的距离相等,求
的值;
(4)如图2,作与抛物线
关于
轴对称的抛物线
,当抛物线
与抛物线
围成的封闭区域内(不包括边界)共有11个横、纵坐标均为整数的点时,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/86656df7f61c59b2b906f02b06475b94.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/f52dbb18-22c6-4315-a992-ca02dcb3313d.png?resizew=197)
(1)若抛物线过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24fbb773104fe20bda3d38eaf87516a0.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd6ad6387d592102a743742620eee7fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd6ad6387d592102a743742620eee7fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(3)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec89d17a1b8f7961e2f1f27c2d50685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d2f5543bdddefc82ba4e8b18638a7ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(4)如图2,作与抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81722445de00f3cfcc3cb97e45b0d8dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81722445de00f3cfcc3cb97e45b0d8dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
【推荐2】如图,抛物线
与
轴交于
两点,与
轴交于点
,且
,直线
与抛物线交于
、
两点,与
轴交于点
,点
是抛物线的顶点,设直线
上方抛物线上的动点
的横坐标为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/a2d1c36d-e8e8-4e7b-8ea3-2b08d123cd6a.png?resizew=400)
(1)求该抛物线的解析式及顶点
的坐标;
(2)连接
、
,当
为何值时,
;
(3)在直线
上是否存在一点
使
为等腰直角三角形,若存在请直接写出点
的坐标,不存在请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c43f704b5d150cb4e29e9796a07d80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6541748f10d7ed5f755f456536dbc829.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab466aedd6e176088d8dee7bc3e3aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/a2d1c36d-e8e8-4e7b-8ea3-2b08d123cd6a.png?resizew=400)
(1)求该抛物线的解析式及顶点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7b997232e251479b5be44bfec577c22.png)
(3)在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d330ae90a71e2ff68e227f4dad4fa25c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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解题方法
【推荐3】如图,在平面直角坐标系中,线段
的两个端点的坐标分别为
、
.抛物线
交y轴于点C,顶点P在线段
上运动.当顶点P与点A重合时,点C的坐标为
.设点P的横坐标为m.
![](https://img.xkw.com/dksih/QBM/2022/5/25/2987010530656256/2989150401937408/STEM/9fd3d5e2-ec69-4611-bb9c-bd4c70bfade8.png?resizew=195)
(1)求a的值.
(2)用含m的代数式表示点C的纵坐标,并求当m为何值时,点C的纵坐标最小,写出最小值.
(3)当点C在y轴的负半轴上且点C的纵坐标随m的增大而增大时,求m的取值范围.
(4)过点P作x轴的垂线交抛物线
于点Q,将线段
绕点P顺时针旋转
得到线段
,连接
.当
的边与坐标轴有四个公共点时,直接写出m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b0821a465f1420f632a98b0ad0331d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2442a318b33a4ee99ca57009c9a2ad1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d92dc7f59572fc5aeba24c37ef09a3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b6a9ffffc0c461881b427c543924cd.png)
![](https://img.xkw.com/dksih/QBM/2022/5/25/2987010530656256/2989150401937408/STEM/9fd3d5e2-ec69-4611-bb9c-bd4c70bfade8.png?resizew=195)
(1)求a的值.
(2)用含m的代数式表示点C的纵坐标,并求当m为何值时,点C的纵坐标最小,写出最小值.
(3)当点C在y轴的负半轴上且点C的纵坐标随m的增大而增大时,求m的取值范围.
(4)过点P作x轴的垂线交抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ec43d86bcefd70d51a9341e11b3954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47cb69e3aecf36784837704df2c1c6f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1a7d7d61e5e512312422d1f55acbc93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c97efd3611858f20b7e20cce7e4fac59.png)
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【推荐1】在平面直角坐标系中,O为坐标原点,抛物线
与x轴交于
,
两点,与y轴交于点C.
(1)求a,b的值.
(2)P为抛物线上一动点,其横坐标为
,过点P作x轴的平行线交抛物线于另一点M,作x轴的垂线PN,垂足为点N.
①求
的最大值.
②直线MN交y轴于点D,四边形CDNP可能是平行四边形吗?若可能,请求出点P的横坐标;若不可能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ceba6b11658f2cc227b1f550ba25c3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ba5cbb31299d683ac6c7dd795db85.png)
(1)求a,b的值.
(2)P为抛物线上一动点,其横坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fbce8d864898108746179b5d7a69f5a.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2bb1548ddc0e5536a35b1bd78c4e7cd.png)
②直线MN交y轴于点D,四边形CDNP可能是平行四边形吗?若可能,请求出点P的横坐标;若不可能,请说明理由.
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【推荐2】在平面直角坐标系中,设二次函数
(
是实数)
(1)当
时,若点
在该函数图象上,求
的值.
(2)已知
,
,
,从中选择一个点作为该二次函数图象的顶点,判断此时
是否在该二次函数的图象上.
(3)已知点
,
都在该二次函数图象上,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d95c312aab7918ac83bd168cfcc177.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aed39f5aca78934fb383402433fe549.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/706f7e3ec54d1e157943e990a8b4f5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47f7bf0759ac4d7695acd7a9d5d0e77c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c759374c2a222598d93e60b42c4f8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf99602ca5fdec80be241616453e16a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00b99663061922344c18dec5093deaf3.png)
(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f39ad030ce2753cd07b9224460d6d88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ea136a150856870e94bd237366f6b1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/005564f0423ca8175210cc256f65efdb.png)
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【推荐1】在平面直角坐标系
中,抛物线
与x轴相交于点A,B(点A在点B左侧),与y轴相交于点C.
(1)求出点A、B的坐标;
(2)已知点
.
①请求点P的坐标,使得对于任意非零实数a,点P都不在抛物线G上;
②当
时,是否存在非零实数a,使得点P恒在
的内部?若存在,请求出a的取值范围.若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b822bfca1fac30bce45ec480194e262.png)
(1)求出点A、B的坐标;
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f54292150442000704536b1ec3180f9d.png)
①请求点P的坐标,使得对于任意非零实数a,点P都不在抛物线G上;
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1961f45e9de6198a9d5807a004de92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
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【推荐2】如图,已知抛物线
与x轴交点为A、B,A在B的左侧,与y轴交点为点C,且抛物线与直线交于A、C.
(1)求直线
的表达式;
(2)是D第二象限内抛物线上的动点,设点D的横坐标为m,求三角形
面积的最大值及此时D点的坐标;
(3)若点P在抛物线对称轴上,是否存在点P,Q,使以点A,C,P,Q为顶点的四边形是以
为对角线的菱形?若存在,请求出P,Q两点的坐标:若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02955b33a997543f4ea569f2cfa46c59.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/29/8e155de3-fc8c-43ac-bd11-4da5c45d0615.png?resizew=379)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)是D第二象限内抛物线上的动点,设点D的横坐标为m,求三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
(3)若点P在抛物线对称轴上,是否存在点P,Q,使以点A,C,P,Q为顶点的四边形是以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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【推荐1】如图,在平面直角坐标系中,二次函数
的图象与
轴交于
、
两点,
点在原点的左则,
点的坐标为
,与
轴交于
点,点
是直线
下方的抛物线上一动点.
![](https://img.xkw.com/dksih/QBM/2018/9/30/2043572575535104/2044213214535680/STEM/d0217e10f23840558e4d7c49751959bc.png?resizew=136)
求这个二次函数的表达式;
求出四边形
的面积最大时的
点坐标和四边形
的最大面积;
连结
、
,在同一平面内把
沿
轴翻折,得到四边形
,是否存在点
,使四边形
为菱形?若存在,请求出此时点
的坐标;若不存在,请说明理由;
在直线
找一点
,使得
为等腰三角形,请直接写出
点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cab717b95ec0d1626af9bf91650f19f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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解答题-问答题
|
较难
(0.4)
【推荐2】如图,抛物线
与x轴交于
,
两点,与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/bff01c68-17cf-4acf-86a2-3db834ae87ed.png?resizew=228)
(1)求该抛物线的解析式;
(2)在抛物线的对称轴1上是否存在一点M,使MA+MC的值最小?若存在,求出点M的坐标,若不存在,请说明理由;
(3)若点D是抛物线上的一点,且位于直线BC上方,连接CD、BD、AC,当四边形ABDC的面积有最大值时,求点D的坐标及四边形ABDC的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be0cc36d2c146e64d5f6b1af176cc442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46cf33105761b33a385230aa011cd2ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f9fdd7fa465fa26eb65880216edea67.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/bff01c68-17cf-4acf-86a2-3db834ae87ed.png?resizew=228)
(1)求该抛物线的解析式;
(2)在抛物线的对称轴1上是否存在一点M,使MA+MC的值最小?若存在,求出点M的坐标,若不存在,请说明理由;
(3)若点D是抛物线上的一点,且位于直线BC上方,连接CD、BD、AC,当四边形ABDC的面积有最大值时,求点D的坐标及四边形ABDC的面积.
您最近一年使用:0次