如图1:平面直角坐标系中,抛物线
与x轴交于点
和点B,与y轴交于点C,点
是抛物线上一点,
(2)如图2,点
是y轴上一点,连接
,点P是直线
上方抛物线上一个动点,过点P作
轴交直线
于点E,在射线
上取一点F,使得
,求
周长的最大值及此时点P的坐标.
(3)如图3,将原抛物线
沿射线
方向平移4个单位长度,平移后抛物线
的对称轴与x轴交于点N,射线
上有一点G,连接
,过点G作
的垂线与抛物线
交于点M,连接
,若
,请直接写出点M的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/154a0bf9c0ce3bd218791fffa484e56f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be087d2c1c3d209ff3bbe8c94a1f3673.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e27af9c503ba75ce50785f1b043d198.png)
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ffd0d0c3c95286fc38ae21bd6114a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/213144e25996b7fd3cd69d9c5ae56be2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b30155e0e3cf7c5146d3311e5b8da93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
(3)如图3,将原抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/154a0bf9c0ce3bd218791fffa484e56f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a459f78e4a3516d8a8535290ede7f386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a459f78e4a3516d8a8535290ede7f386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a8be225a865367545ead73c734465c.png)
更新时间:2024-03-05 14:35:30
|
相似题推荐
解答题-问答题
|
困难
(0.15)
真题
【推荐1】如图1,抛物线
(
)与
轴交于
,
两点,与
轴交于点
.
(2)点P在抛物线上,点Q在x轴上,以B,C,P,Q为顶点的四边形为平行四边形,求点P的坐标;
(3)如图2,抛物线顶点为D,对称轴与x轴交于点E,过点
的直线(直线
除外)与抛物线交于G,H两点,直线
,
分别交x轴于点M,N.试探究
是否为定值,若是,求出该定值;若不是,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8de071a9c22c96a59b172d76c127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d57173ef4cd72eb270686875dfd623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f36488f7dff759ace2a27e56c3857056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)点P在抛物线上,点Q在x轴上,以B,C,P,Q为顶点的四边形为平行四边形,求点P的坐标;
(3)如图2,抛物线顶点为D,对称轴与x轴交于点E,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3356ff3f21b76774c48165c807f12b41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a78abb4b37ce31f711fc7b95c2fb45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55f2599233ab889a17b84ef1a2522716.png)
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名校
【推荐2】如图①,动点P从矩形
的顶点A出发,以
的速度沿折线
向终点C运动;同时,一动点Q从点D出发以
的速度沿
向终点C运动,当一个点到达终点时,另一个点也停止运动.点E为
的中点,连接
,
,记
的面积为S,其函数图象为折线
和曲线
(图②),已知
,
,点G的坐标为
.
的值为 ;
的值为 ;
(2)如果
.
①求线段
所在直线的函数表达式;
②求
所在曲线的函数表达式;
③是否存在某个时刻t,使得
?若存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f44c235d8b49207ad3f2d77dc5d6cf20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde3649680259f7ff84553ddb2891f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/814f55724f7ee57bd395eb3b95393c68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17277a306d4d0a0a0cf293f87802cf66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aff57c3a6668d7cf74cc9132a0c70f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aa3c50b0c0f6987d2eebfe5f8829d3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/636d493f8464828d5c6abf0c1b5e6110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f96d337c61bc385106ddc1882a6bc16a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f737b04ce09bc7e1ed86dc9b3c85203b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0636e0c3ae734c1ac05ef4d53b1f2a92.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dae97d0ab2dc697e4b181a5099d96a8.png)
①求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360496a4f5cc8a5faca5e089ae4f9531.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
③是否存在某个时刻t,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91706e5adcd6d08bfa683425ced57d7c.png)
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【推荐1】在平面直角坐标系中,点
为坐标原点,直线
交x轴于点C,交y轴于点A,点B在x轴负半轴上,
.
(1)如图1,求点C的坐标;
(2)如图2,点D是
上一点(D不与A、B重合),连接
交y轴于点E,过A的直线
交x轴负半轴于点F,连接
,
,求直线
的解析式:
(3)在(2)的条件下,如图3,M为第二象限直线
上一点,连接
交
于点N,P为
上一点,连接
、
,
,
的面积为18,求点P到直线
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04321fa33436854a94f03edc3223ce6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e16cc654e2abf59ffb630243dea244a7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/6/62ca30b2-aad5-4e32-97bf-c9e8ee712f7d.png?resizew=360)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/6/4efe13e4-8843-4975-b2a5-416f56d89f17.png?resizew=499)
(1)如图1,求点C的坐标;
(2)如图2,点D是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1cf73b4e244279594a181af30f8b148.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
(3)在(2)的条件下,如图3,M为第二象限直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83640592853a53872d7af69c0cffc1bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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解答题-证明题
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困难
(0.15)
【推荐2】如图, 已知在 Rt
中,
, 点
为射线
上一动点, 且
, 点
关于直线
的对称点为点
, 射线
与射线
交于点
.
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893833143951360/2898496695533568/STEM/c6d5b7cf-26a3-4c56-8492-ae21b7234b05.png?resizew=230)
(1)当点
在边
上时,
① 求证:
;
②延长
与边
的延长线相交于点
, 如果
与
相似,求线段
的长;
(2)联结
, 如果
, 求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377e2bf9272651444c497f36312acaba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ebe5e7c056f39e96b487f99a372bf76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2022/1/13/2893833143951360/2898496695533568/STEM/c6d5b7cf-26a3-4c56-8492-ae21b7234b05.png?resizew=230)
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
① 求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62505b6d192234fc01724b35d8e2cf33.png)
②延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb936e02a02c16c586d4463b5ca05191.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a9ec45721f7b4d1c99917ac0d970f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)联结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c036436ad0aaeea6aebb13ceb03d6c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2468cb8dae99d9ac0cc695e9b21c5386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c6784571d818982d8d3fe53410bc4b.png)
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解答题-问答题
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困难
(0.15)
名校
【推荐1】已知,在
中,
,
,点P是边
上的一个动点,连接
,以
为一边,在
外作
,
交
的延长线于点D.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/d0771a8a-3601-4207-92db-b8d58d92fe5b.png?resizew=368)
(1)当
平分
时,求
的面积;
(2)当
时,求
的正弦值;
(3)设
,
,求y与x之间的函数解析式,并写出自变量的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854f480c60b88b546cb15d3b5622e212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4af1d3437ddbad848b0ddd4cd3b26ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/286040af3fbb7d634cb96364e73084de.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/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854f480c60b88b546cb15d3b5622e212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f026988fb1a83fb60894b2d4c3e2c368.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/d0771a8a-3601-4207-92db-b8d58d92fe5b.png?resizew=368)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96e32f73fb8e0c0cec6e78bc536fb13b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8134b1163ca3cd2e34ff17fc81078c3d.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28bb994c172c6e9a318f6bef13d149c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c659e451b1f3f344e8f3cd2a3535fdfc.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56361525f4d110516c16b11c432f0781.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4519838776560b0534dc546b88d985a.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐2】如图,
为的
直径,
.动点
在
上且位于直线
上方,连结
.将线段
绕点
顺时针旋转
得到线段
,以
、
为邻边构造正方形
,连结
、
.
与点
重合时,线段
的长为______ ;
(2)当
时,求
的长;
(3)当
为等腰三角形时,求
;
(4)当点
落在
的边
或边
的中线上时,直接写出线段
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9774f83067ed956a551bc41adcce0469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c7c771f0268b7ccf12d5109297ec4f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4635b3ba280ea836f37948e70f039103.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e14f419e14bc30fe2fada469a0fbbb64.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a3dbb1f557753413070f589ea315526.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3a3bf63440a2fdd769162516fb0e1c.png)
(4)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5845d0b7ca6980eea65473c0de995de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf3d566704b44ea4ef1f99c37bd46902.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
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【推荐1】如图1,抛物线y=﹣x2﹣2x+3与x轴从左到右交于A、B两点,与y轴交于点C,顶点为D
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/5/bd5235e8-183e-434b-b4e0-49bcc57fa847.png?resizew=523)
(1)求直线AC的解析式与点D的坐标;
(2)在直线AC上方的抛物线上有一点E,作EF∥x轴,与抛物线交于点F,作EM⊥x轴于M,作FN⊥x轴于N,长度为2
的线段PQ在直线AC上运动(点P在点Q右侧),当四边形EMNF的周长取最大值求四边形DPQE的周长的最小值及对应的点Q的坐标;
(3)如图2,平移抛物线,使抛物线的顶点D在直线AD上移动,点D平移后的对应点为D′,点A平移后的对应点为A′,△A′D′C是否能为直角三角形?若能,请求出对应的线段D′C的长;若不能,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/5/bd5235e8-183e-434b-b4e0-49bcc57fa847.png?resizew=523)
(1)求直线AC的解析式与点D的坐标;
(2)在直线AC上方的抛物线上有一点E,作EF∥x轴,与抛物线交于点F,作EM⊥x轴于M,作FN⊥x轴于N,长度为2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(3)如图2,平移抛物线,使抛物线的顶点D在直线AD上移动,点D平移后的对应点为D′,点A平移后的对应点为A′,△A′D′C是否能为直角三角形?若能,请求出对应的线段D′C的长;若不能,请说明理由.
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【推荐2】抛物线
与
轴交于点
,
(点
在点
的左边),与
轴交于点
,点
是该抛物线的顶点.
(1)如图1,连接
,求线段
的长;
(2)如图2,点
是直线
上方抛物线上一点,
轴于点
,
与线段
交于点
;将线段
沿
轴左右平移,线段
的对应线段是
,当
的值最大时,求四边形
周长的最小值,并求出对应的点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50ddd0774d447ee65be3d8d7c35a3b37.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/8455657dde27aabe6adb7b188e031c11.png)
(1)如图1,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b1da9046b4cb82135a4a1eaa528c53.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49ea83a384f056dadaacfa349cc84130.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d739e44ce5aa6097116c29f3fee4ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e6adbb5a24a07988da638c742bb76c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/22/41a95df2-dc6d-4fcc-b41e-0f2df7a7e2d2.png?resizew=379)
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名校
【推荐3】如图1,在平面直角坐标系中,抛物线
与x轴交于A,B两点(点A在点B左侧),与y轴交于点
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/23d25630-3d01-4188-aada-2313ef9d2df9.png?resizew=589)
(1)求这个抛物线的解析式;
(2)如图2,点P为线段
上方抛物线上一动点,过P点作线段
的垂线交
于点R,作x轴的平行线交
于点Q,当
的周长最大时,请求出
周长的最大值及点P的坐标;
(3)在(2)的条件下,将抛物线y沿射线
方向平移
个单位到新抛物线
,M为新抛物线
与原抛物线y的交点,N为原抛物线对称轴上一点,S为平面上任意一点,是否存在点S使得以点M,N,P,S为顶点的四边形为菱形?若存在,请直接写出满足条件的S点的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/345b67f9bd7bd80f8f52b1c7c55fb5f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/114460aab294eb99eec63e94b675216f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497e34cb645ed931bea31c5d4c558c94.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/23d25630-3d01-4188-aada-2313ef9d2df9.png?resizew=589)
(1)求这个抛物线的解析式;
(2)如图2,点P为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c28abb154f41e1ca9816c9c9c2433ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c28abb154f41e1ca9816c9c9c2433ca.png)
(3)在(2)的条件下,将抛物线y沿射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
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