如图,在平面直角坐标系中,抛物线
经过
、
两点,且与x轴交于另一点B(点B在点A右侧).
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/74a9a73f-889b-4a95-a879-5e243002715d.png?resizew=315)
(1)求抛物线的解析式;
(2)若点M是线段
上一动点,过点M的直线
平行y轴交x轴于点D,交抛物线于点E,求
面积的最大值及此时点M的坐标;
(3)在(2)的条件下:当
的面积取得最大值时,在x轴上是否存在这样的点P,使得以点M,B,P为顶点的三角形是等腰三角形?若存在,请直接写出所有点P的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d57173ef4cd72eb270686875dfd623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd81cac5d2bcf0753819951088027d1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/74a9a73f-889b-4a95-a879-5e243002715d.png?resizew=315)
(1)求抛物线的解析式;
(2)若点M是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
(3)在(2)的条件下:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
更新时间:2024-01-19 20:13:23
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】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2】如图所示,抛物线
与x轴相交于
与y轴相交于点
,点M为抛物线的顶点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/c93de37f-6ccd-40f3-aa53-3218cf11d61d.png?resizew=433)
(1)求抛物线的解析式及顶点M的坐标;
(2)如图2,若点N是第四象限内抛物线上的一个动点,过点N作x轴的垂线,垂足为D,并与直线
交于点Q,连接
.求
面积的最大值及此时点N的坐标.
(3)若点P在y轴上,
为等腰三角形,请直接写出P点的坐标。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55354508a2b59df7ad2b16aa0f12bd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd81cac5d2bcf0753819951088027d1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/c93de37f-6ccd-40f3-aa53-3218cf11d61d.png?resizew=433)
(1)求抛物线的解析式及顶点M的坐标;
(2)如图2,若点N是第四象限内抛物线上的一个动点,过点N作x轴的垂线,垂足为D,并与直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b84f23516cc75656a7069e50bd286ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc1275768bdac801185ef152290a85ce.png)
(3)若点P在y轴上,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
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【推荐1】如图1,已知抛物线
与
轴交于
、
两点(点
在点
左边),与
轴交于点
,其中
.
的长度.
(2)如图
,点
是直线
上方抛物线
上的一动点,过点
作
轴交
于点
,作
轴交
于点
,
为
中点,连接
,请求出
的最大值以及此时点
的坐标.
(3)将抛物线
水平向右平移
个单位后得到抛物线
,点
、点
的对应点分别为点
、点
,抛物线
与
轴交于点
(点
不与原点重合),连接
、
.在平移过程中,当
时,请直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59197d4d42e5a7aaa713dbba8c36d941.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d57173ef4cd72eb270686875dfd623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](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/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e054e81ff6a6b94faa83218ca7c8fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/017cc59c090ad11727022798dd7a71b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41f3a30d63fde5623d018b4a77231967.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81300110b3e11cece7f1162fe3fb3291.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.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/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9399c9a2a31b0e3165aea2d6ccc4f7c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5e884ca9429486026caa5e2310b0e4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f62eed3cfe2a818fe80a59dcc894a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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名校
【推荐2】如图1,在平面直角坐标系中,抛物线
与
轴分别交于
、
两点,与
轴交于点
,连接
、
,其中
,
.
![](https://img.xkw.com/dksih/QBM/2022/4/26/2968505632006144/2988432454148096/STEM/44a78e6e-d396-4ce7-a8d1-6ec5e3a24f36.png?resizew=661)
(1)求该抛物线的函数解析式;
(2)点
是直线
上方抛物线上一点,过点
作
轴交直线
于点
,求
的最大值,并写出此时点
的坐标;
(3)如图2,设点
是原抛物线的顶点,
轴上有一点
,将原抛物线沿
轴正方向平移恰好经过点
时停止,得到新抛物线
,点
为
的对称轴上任意一点,连接
,当
是等腰三角形时,直接写出所有符合条件的点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913f78382630e50543e5f7192cae3ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aad9e91966c563d3766e7a0f1f04ddd8.png)
![](https://img.xkw.com/dksih/QBM/2022/4/26/2968505632006144/2988432454148096/STEM/44a78e6e-d396-4ce7-a8d1-6ec5e3a24f36.png?resizew=661)
(1)求该抛物线的函数解析式;
(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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e19a722a1564ff4cecc6e1b5a6c59096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)如图2,设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ead13c7044221745d68e62c03f74d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b6056134daade6c053b1f28e3ebc6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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真题
【推荐1】综合与探究
如图,抛物线y=
与x轴交于A,B两点(点A在点B的左侧),与y轴交于点C,连接AC,BC.点P是第四象限内抛物线上的一个动点,点P的横坐标为m,过点P作PM⊥x轴,垂足为点M,PM交BC于点Q,过点P作
交x轴于点E,交BC于点F.
![](https://img.xkw.com/dksih/QBM/2018/7/14/1988216792039424/null/STEM/5daf0bbc69c648528ff1a25419429a35.png?resizew=204)
(1)求A,B,C三点的坐标;
(2)试探究在点P运动的过程中,是否存在这样的点Q,使得以A,C,Q为顶点的三角形是等腰三角形.若存在,请直接写出此时点Q的坐标;若不存在,请说明理由;
(3)请用含m的代数式表示线段QF的长,并求出m为何值时QF有最大值.
如图,抛物线y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02870e5a3f0a1bbc43c3070415c2c426.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d0157310b49104bd2f604b4f83ecd2.png)
![](https://img.xkw.com/dksih/QBM/2018/7/14/1988216792039424/null/STEM/5daf0bbc69c648528ff1a25419429a35.png?resizew=204)
(1)求A,B,C三点的坐标;
(2)试探究在点P运动的过程中,是否存在这样的点Q,使得以A,C,Q为顶点的三角形是等腰三角形.若存在,请直接写出此时点Q的坐标;若不存在,请说明理由;
(3)请用含m的代数式表示线段QF的长,并求出m为何值时QF有最大值.
您最近一年使用:0次
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【推荐2】综合与探究
如图,在平面直角坐标系中,直线
与
轴交于
点,与
轴交于
点,抛物线
)经过
,
两点,与
轴相交于另一点
,连接
.点
是线段
上方抛物线上的一个动点,过点
作
交线段
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/bad93697-71aa-4cf2-9833-7f70e3f1648e.png?resizew=262)
(1)求抛物线的解析式;
(2)点
为抛物线对称轴上的一个动点,则
的最大值是___________;
(3)求
的最大值,并写出此时点
的坐标;
(4)在
轴上找一点
,抛物线上找一点
,使以点
为顶点的四边形是平行四边形,请直接写出点
的坐标.
如图,在平面直角坐标系中,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8b53ee0f15a869abf58a1aedd616c7d.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fae87d5b04b164e7f976e7e0093bf27.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/902f24325565a9dd95128a633a240da2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/bad93697-71aa-4cf2-9833-7f70e3f1648e.png?resizew=262)
(1)求抛物线的解析式;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adb8caba7fe6c16b7ba6fb4766334113.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(4)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/bfaeff3bfaaf495b06f8b2c6660f6841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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【推荐3】已知抛物线
,与x轴交于A,B两点(点B位于点A的右侧),与y轴交于点C,P是抛物线上的一动点,横坐标为t.
(1)下列说法正确的是___.(填序号)
①抛物线开口向上
②当
时,y随着x的增大而增大
③点A,B的坐标分别为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f15a74f39dcc67faec15c741d63a3d55.png)
④若点P在x轴下方,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/239828e370b57c2adb3d3fa62a60c0f6.png)
(2)如图,若
,点P位于第四象限,过点P作x轴的平行线交
于点D,过点P作y轴的平行线交x轴于点E,求
的最大值及此时点P的坐标.
(3)在(2)中
取得最大值的条件下,将该抛物线沿水平方向向左平移5个单位长度,F为点P的对应点,平移后的抛物线与y轴交于点G,M为平移后的抛物线的对称轴上一点,在平移后的抛物线上确定一点N,使得以F,G,M,N为顶点的四边形是平行四边形,直接写出所有符合条件的点N的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a52e840316fb1ca5cd99cf6f32eb09.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/19/5cc2609d-b40d-4a1f-b55c-99161d66e280.png?resizew=156)
(1)下列说法正确的是___.(填序号)
①抛物线开口向上
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
③点A,B的坐标分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f15a74f39dcc67faec15c741d63a3d55.png)
④若点P在x轴下方,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/239828e370b57c2adb3d3fa62a60c0f6.png)
(2)如图,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41f3a30d63fde5623d018b4a77231967.png)
(3)在(2)中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41f3a30d63fde5623d018b4a77231967.png)
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【推荐1】如图,已知二次函数
的图象与x轴交于点A,B(点A在点B的左边),与y轴交于点C.点P,Q为抛物线上两动点.
![](https://img.xkw.com/dksih/QBM/2023/1/8/3148540468518912/3149738892443648/STEM/f2c02e1daf5f4bd79c1de6325a2994f1.png?resizew=418)
(1)若点P坐标为
,求抛物线的表达式;
(2)如图①,连接
,在(1)的条件下,是否存在点
,使得
.若存在,请求出点
的坐标,若不存在,请说明理由;
(3)若点
为抛物线顶点,连接
,当
的值从
变化到
的过程中,求线段
扫过的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235994722400865930c062118e1f7610.png)
![](https://img.xkw.com/dksih/QBM/2023/1/8/3148540468518912/3149738892443648/STEM/f2c02e1daf5f4bd79c1de6325a2994f1.png?resizew=418)
(1)若点P坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ce2f5e22175e3ff8ab5e0afca58f9c.png)
(2)如图①,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cca4fb838b8c3842096ebf67d0f4381d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
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【推荐2】抛物线
:
与x轴交于A,B两点(点A在点B的左边),与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/10/ae876cbf-b986-434f-81a7-e4040c6ad593.png?resizew=274)
(1)直接写出点A,B,C的坐标;
(2)如图1,D是第四象限内抛物线上一点,连接
,
交y轴于点H,若
,求点D的坐标;
(3)如图2,将抛物线
平移得到抛物线
,使其顶点为原点,过点
的直线交抛物线于E,F两点(点E在点F的上方),过点E作直线
的平行线交抛物线于另一点M,连接
,求证:直线
必过一定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92738aadeac1e3d3d8e919772bce727.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/10/ae876cbf-b986-434f-81a7-e4040c6ad593.png?resizew=274)
(1)直接写出点A,B,C的坐标;
(2)如图1,D是第四象限内抛物线上一点,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7c6abf0d0ae242c5a129fdce60838a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea981c9a7ace3c3a954bd9937f4c4b4e.png)
(3)如图2,将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33cc0f9aa168e43cc5759f017d69b498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4407788e4dc88210bca71a2551d4f2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
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