如图
,在平面直角坐标系中.抛物线
与
轴交于
和
,与
轴交于点
,连接
,
.
(2)如图
,点
为直线
上方的抛物线上任意一点,过点
作
轴的平行线,交
于点
,过点
作
轴的平行线,交直线
于点
,求
周长的最大值;
(3)点
为抛物线上的一动点,是否存在点
使
?若存在,请求出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0d44326c214c7a5ecc3068a29ec96f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/586d6b7a54a256cb0ecd0ea2d8262f6d.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed283a253b61df01f2a1cdc0cd8003f3.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0f87042e6c1521b35f03f45bf2920f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
更新时间:2024-04-05 15:15:20
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】如图,在平面直角坐标系中,点
为坐标原点,抛物线
与
轴的负半轴交于点
,与
的正半轴交于点
,与y轴正半轴交于点
,
.
(2)点
是第四象限内抛物线上一点,连接
交
轴于点
,过
作
轴交抛物线于点
,连接
,设四边形
的面积为
,点
的横坐标的
,求
与
的函数解析式;
(3)在(2)的条件下,过
作
轴交
于点
,连接
交
于点
,点
是
上一点,连接
,当
,
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10e71461c5134339b5b54a80e588640f.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/81dea63b8ce3e51adf66cf7b9982a248.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/fa6d65a514fe4eef4fc84059b27a2cb1.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/f425c7db35f8f3b7cac4b534afe2d4ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5d803de8455b9b10eaf9c9d0538835a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)在(2)的条件下,过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5fa698ea2662cbff104216ec47f7251.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d845e7060a6f138ecd9388bb83ee58c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e7a750e1d4fe4800e2d4323131082fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/171af4ce8b4754f40c607df9c6286ab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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A,B两点,与y轴交于C点,连接AC,已知B(﹣1,0),且抛物线经过点D(2,﹣2).
(2)若点E是抛物线上第四象限内的一点,且
,求点E的坐标;
(3)若点P是y轴上一点,以P,A,C三点为顶点的三角形是等腰三角形,求P点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/114da91d9b7124b283b3edcd50daf60d.png)
(2)若点E是抛物线上第四象限内的一点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/405b334eb435535d61d5c5efdaeb3495.png)
(3)若点P是y轴上一点,以P,A,C三点为顶点的三角形是等腰三角形,求P点的坐标.
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
真题
名校
【推荐1】如图,在平面直角坐标系
中,直线
分别交x轴、y轴于A,B两点,经过A,B两点的抛物线
与x轴的正半轴相交于点
.
(2)若P为线段AB上一点,
,求AP的长;
(3)在(2)的条件下,设M是y轴上一点,试问:抛物线上是否存在点N,使得以A,P,M,N为顶点的四边形为平行四边形?若存在,求出点N的坐标;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/023ab3a7eb0f59993c7608576e47c0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca0b4afd16b79370532de44989d6c43d.png)
(2)若P为线段AB上一点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0614bcec329b374186c1fb0e392de144.png)
(3)在(2)的条件下,设M是y轴上一点,试问:抛物线上是否存在点N,使得以A,P,M,N为顶点的四边形为平行四边形?若存在,求出点N的坐标;若不存在,请说明理由.
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐2】在矩形
中,
,
是边
上一点,把
沿直线
折叠,顶点
的对应点是点
,交
于
,连结
交
于
,且
,连结
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/be00da15-3da6-4b86-8cb3-1cfea117890f.png?resizew=157)
(1)求证:四边形
是菱形;
(2)当
,且
时,求
的长;
(3)当
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b65065ec3a0cb4b050989165c003d1.png)
![](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/05e78042a384255038de485fd7bc0839.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d89ff9e8f94e5f3956ac0c9509e1888.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/be00da15-3da6-4b86-8cb3-1cfea117890f.png?resizew=157)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2389de73a23244c2d11def3b4f714ab.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d5c3ccd350ed8aad71fed37ea423b90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ae995fabb31e44bd5eaa5642e7e95c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7617d86e6bed133a865f58dea804e1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】已知抛物线
与x轴交于A、B 两点,点A 在点B 的左边,与y 轴交于点
,且
.
(1)求二次函数的解析式;
(2)若抛物线上B、C 两点之间有一点N,且
的面积为4,求N点坐标;
(3)抛物线的对称轴交x 轴于M,P 为抛物线上一动点,直线
交抛物线于另一点Q,点P 关于抛物线对称轴的对称点为
,直线
交对称轴于G 点,试探究:在P 点运动的过程中,线段
的长度会发生变化吗?若不变,请求其长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4507909b38b8c78b81deefb7478a75da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5558ffa6dc28d437c0467c7f361d444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/20/f01d46c5-3ff2-4f85-b746-f1b6429fda49.png?resizew=315)
(1)求二次函数的解析式;
(2)若抛物线上B、C 两点之间有一点N,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc1275768bdac801185ef152290a85ce.png)
(3)抛物线的对称轴交x 轴于M,P 为抛物线上一动点,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de4a5395c94c4a317214a4c5720dfac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e9e953a4a5f98c96bbe67cbaadf76d9.png)
您最近一年使用:0次
解答题-问答题
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较难
(0.4)
【推荐2】在平面直角坐标系
中,抛物线
与
轴交于点
,
,与
轴交于点
,对称轴直线
与
轴交于点
,连接
,
,
的面积为
.
(2)如图2,点
为抛物线上的一个动点,点
的横坐标为
,过点
作直线
轴交直线
于点
,
于点
,当
时,求
的值;
(3)抛物线
与
关于
轴对称,若点
是抛物线
上一点,点
在直线
上,点
在坐标平面内,当四边形
是正方形时,请求出点
的横坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](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/00b43a40d1c78f48590b69efdfb7337e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6570863c11e0c2a0dddc9ebb623e5c85.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/0f85fca60a11e1af2bf50138d0e3fe62.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ad9de54606c4a72d0f8decb6b0e63b2.png)
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a11aa6595e26b877f3096a087e1ec5.png)
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c1ec8da5eb4b009b2d4f12777cacfec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7196cf68ef46f81af895e0cacadbf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e94556fc78e40aef7e9a3212f1ae24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e94556fc78e40aef7e9a3212f1ae24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9d0e5808a10c2e8823ace3267f5ed7a.png)
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解答题-问答题
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较难
(0.4)
【推荐1】抛物线
与x轴交于A、B两点(点A在点B的左边),与y轴的正半轴交于C点,
的面积为6.
(1)直接写出点A、B的坐标为 、 ;抛物线的解析式为
(2)如图1,连结
,若在第一象限抛物线上存在点D,使点D到直线
的距离为
,求点D的坐标;
(3)如图2,平行于
的直线交抛物线于M、N两点,在抛物线上存在点P,当PQ⊥y轴时,
恰好平分
,求P点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/526bb5b206810f46a51d960f58510779.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/12/c2413537-ab4c-4c27-b9e4-f052192870d7.jpg?resizew=317)
(1)直接写出点A、B的坐标为 、 ;抛物线的解析式为
(2)如图1,连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbce0eb89d739e52cef4bedf1f920989.png)
(3)如图2,平行于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45a8a837c11c07073da3ff751d70278.png)
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解答题-问答题
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较难
(0.4)
【推荐2】二次函数y=ax²-6ax+c(a>0)的图像抛物线过点C(0,4),设抛物线的顶点为D.
![](https://img.xkw.com/dksih/QBM/2014/2/19/1573705929605120/1573705935486976/STEM/ded97bffe81a4d0e964e01d592f66f52.png)
(1)若抛物线经过点(1,-6),求二次函数的解析式;
(2)若a=1时,试判断抛物线与x轴交点的个数;
(3)如图所示A、B是⊙P上两点,AB=8,AP=5.且抛物线过点A(x1,y1),B(x2,y2),并有AD=BD.设⊙P上一动点E(不与A、B重合),且∠AEB为锐角,若<a≤1时,请判断∠AEB与∠ADB的大小关系,并说明理由.
![](https://img.xkw.com/dksih/QBM/2014/2/19/1573705929605120/1573705935486976/STEM/ded97bffe81a4d0e964e01d592f66f52.png)
(1)若抛物线经过点(1,-6),求二次函数的解析式;
(2)若a=1时,试判断抛物线与x轴交点的个数;
(3)如图所示A、B是⊙P上两点,AB=8,AP=5.且抛物线过点A(x1,y1),B(x2,y2),并有AD=BD.设⊙P上一动点E(不与A、B重合),且∠AEB为锐角,若<a≤1时,请判断∠AEB与∠ADB的大小关系,并说明理由.
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