已知直线
与x轴交于点A,过x轴上A,C两点的抛物线
与y轴交于点B,与直线
交于D且
,
(2)求抛物线的解析式;
(3)若点M是抛物线对称轴l上一动点,当
的周长最小时,求
的面积;
(4)点P是抛物线上一动点(点P不与B,C重合),连接
,若
的面积等于3,求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6e15daf7b14dbff32c390f4984dcfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8de071a9c22c96a59b172d76c127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6e15daf7b14dbff32c390f4984dcfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c8dbc31b2e14067ef2f34b4e25f114.png)
(2)求抛物线的解析式;
(3)若点M是抛物线对称轴l上一动点,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26e59b7c0d4a0b312e674b7bb061240b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26e59b7c0d4a0b312e674b7bb061240b.png)
(4)点P是抛物线上一动点(点P不与B,C重合),连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d51c39cb0c01422c585bf30f973c0f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3da7bcea5a45eeae211f5851f12a7517.png)
2023·湖北恩施·一模 查看更多[2]
更新时间:2023-05-10 17:06:01
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相似题推荐
解答题-问答题
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【推荐1】如图,在平面直角坐标系中,直线
分别交x轴,y轴于点C、点B,点A在x轴的负半轴上,满足
,直线l:
经过点C,连接
.
(1)求直线
的解析式及b的值;
(2)在直线l上存在一点P,使得
,求点P的坐标;
(3)若点M是直线l上一动点,且点M在x轴的上方,点N是平面内任意一点,是否存在点M、N,使以点B,C,M,N为顶点的四边形是菱形.若存在,请直接写出满足条件的点M的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b20c4788cfcfdf415c13fba38bf78454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31eec70cf44c972ee1b2e185db9ccc20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/634cfbfa72c819314962cc08fc29ac15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/27/4309a760-cb8f-4c23-8cdb-115a19a72779.png?resizew=209)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)在直线l上存在一点P,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff85ca310132c9e99afd3eafc006505e.png)
(3)若点M是直线l上一动点,且点M在x轴的上方,点N是平面内任意一点,是否存在点M、N,使以点B,C,M,N为顶点的四边形是菱形.若存在,请直接写出满足条件的点M的坐标,若不存在,请说明理由.
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【推荐2】如图,在直角坐标平面内,已知点
、点
轴正半轴有一点
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/250c2122d4806d27094a8239892ca02b.png)
(1)求直线
的解析式;
(2)求
的正切值;
(3)线段
上有一点
,当
与
相似时,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a18a7caa080988802ba1145b4fe4203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6251c427399064d5a5a1eff97f2be16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/250c2122d4806d27094a8239892ca02b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/20/7c9f306c-5d4f-4fc9-b24d-23f60da0f659.png?resizew=193)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
(3)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd5a1e516644950ef35eafd859b262f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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【推荐1】在平面直角坐标系xOy中,二次函数y=ax2+bx+c(a≠0)的图象经过A(0,4),B(2,0),C(-2,0)三点.
(1)求二次函数的表达式;
(2)在x轴上有一点D(-4,0),将二次函数的图象沿射线DA方向平移,使图象再次经过点B.
①求平移后图象顶点E的坐标;
②直接写出此二次函数的图象在A,B两点之间(含A,B两点)的曲线部分在平移过程中所扫过的面积.
(1)求二次函数的表达式;
(2)在x轴上有一点D(-4,0),将二次函数的图象沿射线DA方向平移,使图象再次经过点B.
①求平移后图象顶点E的坐标;
②直接写出此二次函数的图象在A,B两点之间(含A,B两点)的曲线部分在平移过程中所扫过的面积.
![](https://img.xkw.com/dksih/QBM/2019/1/17/2120560052731904/2122151192207360/STEM/ca7bfaac1ed7485792472cfbea4d925a.png?resizew=162)
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【推荐2】如下图①,抛物线
与x轴交于点
,与y轴交于点C,连接
.
(1)求抛物线的表达式;
(2)抛物线上是否存在点M,使得
的面积与
的面积相等,若存在,请直接写出点M的坐标;若不存在,请说明理由;
(3)点
在第一象限的抛物线上,连接
.在对称轴左侧的抛物线上是否存在一点P,满足
?如果存在,请求出点P的坐标;如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/415ce7008a89ffca8c3c3edbf13a935e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c4cf93b2b75cc913c12fc93f8adaa52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(1)求抛物线的表达式;
(2)抛物线上是否存在点M,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad3e2b2689dfe97ec82d473ab6cf469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcc52a06d806fde891e09a0a389fcd4.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05c00eab64a88ee6ef317c34bc41941c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a458aa4e438a9b1e6cd54827c30ce76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/1b5219d8-8d77-48a7-aede-377a819be93d.png?resizew=297)
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真题
【推荐1】如图1,二次函数
的图象与一次函数
的图象交于
,
两点,点
的坐标为
,点
在第一象限内,点
是二次函数图象的顶点,点
是一次函数
的图象与
轴的交点,过点
作
轴的垂线,垂足为
,且
.
(1)求直线
和直线
的解析式;
(2)点
是线段
上一点,点
是线段
上一点,
轴,射线
与抛物线交于点
,过点
作
轴于点
,
于点
.当
与
的乘积最大时,在线段
上找一点
(不与点
,点
重合),使
的值最小,求点
的坐标和
的最小值;
(3)如图2,直线
上有一点
,将二次函数
沿直线
平移,平移的距离是
,平移后抛物线上点
,点
的对应点分别为点
,点
;当△
是直角三角形时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8199513f54c96aa1743179c3065c37f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e114459637a3db306e91b5e9ee9aae8.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/ab1242ec96ac54e2fd418988d5190a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e114459637a3db306e91b5e9ee9aae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/92e73ad31e2bdc6413471390ac9975d3.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c92d97e1136fe9f48fcd5c8bbdc2dbe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae95e96ce568efee50145f8d017353df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7edadd9995393ece0d7b7bf4801504bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.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/9ca0c130c40cefc502c9805b3279e0fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ca0c130c40cefc502c9805b3279e0fd.png)
(3)如图2,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/affa0f99f2e76ac7bb7c8cdec3b540f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8199513f54c96aa1743179c3065c37f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d2248b0700570d1b46f27292698ef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b10100be43f77a13fa0ccd1c1d72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39e210795a966bd5dc1293479ab1988b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2723f69b17cd601b3abec0a173768c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/2016/6/29/1574215156318208/1574215162748928/STEM/12c4de81f4bb45b48f7ce855ba52c8e3.png?resizew=367)
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【推荐2】综合与探究
如图,二次函数
的图象与x轴交于
,
两点,与y轴交于点C,连接
.P是抛物线上第一象限内的一个动点,过点P作
轴于点D,交
于点E,过点P作直线
,交y轴于点F,交
于点G,连接
,过点C作
于点H.
的函数表达式.
(2)求线段
的最大值.
(3)在点P运动的过程中,是否存在点F,使
?若存在,请直接写出点F的坐标;若不存在,请说明理由.
如图,二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0d44326c214c7a5ecc3068a29ec96f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d57173ef4cd72eb270686875dfd623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69fff64ee6ea236550185efc7ed1b598.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a6d50515fc65885d44cd6a3c41e6a7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f00d0ff8dd38da17167cf9b789eec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f152347bed31f86d4f58b24128a9eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9a6354673d9a5953a63f7bc2e595dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
(3)在点P运动的过程中,是否存在点F,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/769250897ccf41ddf104c3a0febc2bf9.png)
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【推荐3】如图(1),在平面直角坐标系中,矩形ABCO,B点坐标为(4,3),抛物线y=
x2+bx+c经过矩形ABCO的顶点B、C,D为BC的中点,直线AD与y轴交于E点,与抛物线y=
x2+bx+c交于第四象限的F点.
![](https://img.xkw.com/dksih/QBM/2013/5/30/1578224534274048/1578224534880256/STEM/caec5943f148475cbc6ce51d08e94376.png)
(1)求该抛物线解析式与F点坐标;
(2)如图,动点P从点C出发,沿线段CB以每秒1个单位长度的速度向终点B运动;
同时,动点M从点A出发,沿线段AE以每秒
个单位长度的速度向终点E运动.过
点P作PH⊥OA,垂足为H,连接MP,MH.设点P的运动时间为t秒.
①问EP+PH+HF是否有最小值,如果有,求出t的值;如果没有,请说明理由.
②若△PMH是等腰三角形,求出此时t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f94407f032de7a4c49ec6dc8809133c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f94407f032de7a4c49ec6dc8809133c.png)
![](https://img.xkw.com/dksih/QBM/2013/5/30/1578224534274048/1578224534880256/STEM/caec5943f148475cbc6ce51d08e94376.png)
(1)求该抛物线解析式与F点坐标;
(2)如图,动点P从点C出发,沿线段CB以每秒1个单位长度的速度向终点B运动;
同时,动点M从点A出发,沿线段AE以每秒
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/700762875cb4f15b556a72f10a42ac9f.png)
点P作PH⊥OA,垂足为H,连接MP,MH.设点P的运动时间为t秒.
①问EP+PH+HF是否有最小值,如果有,求出t的值;如果没有,请说明理由.
②若△PMH是等腰三角形,求出此时t的值.
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【推荐1】如图,在平面直角坐标系中,直线y=2x+4与x轴,y轴分别交于A,B两点,抛物线
经过A,B两点与x轴相交于点C点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/7/c3abdb42-c892-41c7-b1d2-7303c6d87d9d.png?resizew=181)
(1)求抛物线的解析式;
(2)点P在抛物线上,连接PB,当∠PBC+∠OBA=45°时,求点P的坐标;
(3)点M为抛物线上任意一点,当
时,请直接写出点M的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/940c8f82a5ed7e7ed775e85f9e7bc478.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/7/c3abdb42-c892-41c7-b1d2-7303c6d87d9d.png?resizew=181)
(1)求抛物线的解析式;
(2)点P在抛物线上,连接PB,当∠PBC+∠OBA=45°时,求点P的坐标;
(3)点M为抛物线上任意一点,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e930f61816101573c41c4002c28420.png)
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解答题-问答题
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较难
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【推荐2】如图,平行四边形OBCD中,OB=8cm,BC=6cm,∠DOB=45°,点P从O沿OB边向点B移动,点Q从点B沿BC边向点C移动,P,Q同时出发,速度都是1cm/s.
(1)求经过O,B,D三点的抛物线的解析式;
(2)判断P,Q移动几秒时,△PBQ为等腰三角形;
(3)若允许P点越过B点在BC上运动,Q点越过C点在CD上运动,设线PQ与OB,BC,DC围成的图形面积为y(cm2),点P,Q的移动时间为t(s),请写出y与t之间的函数关系式,并写出t的取值范围.
(1)求经过O,B,D三点的抛物线的解析式;
(2)判断P,Q移动几秒时,△PBQ为等腰三角形;
(3)若允许P点越过B点在BC上运动,Q点越过C点在CD上运动,设线PQ与OB,BC,DC围成的图形面积为y(cm2),点P,Q的移动时间为t(s),请写出y与t之间的函数关系式,并写出t的取值范围.
![](https://img.xkw.com/dksih/QBM/2018/1/8/1856052214652928/1857947371094016/STEM/05dbb7a28fb34f0582fe9a98863eab87.png?resizew=180)
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