如图,在平面直角坐标系中,点
在
轴的负半轴上,点
在第四象限,点
在
轴的正半轴上,连接
、
、
,
,
,抛物线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb6101e45f8d7013bc3dc4197188c0c.png)
经过
、
、
三点.
的坐标和抛物线
的函数表达式;
(2)将抛物线
向上平移
个单位长度后得到抛物线
,在抛物线
上是否存在点
,使得
?若存在,求出所有符合条件的点
的坐标;若不存在,请说明理由.
![](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/7f9e8449aad35c5d840a3395ea86df6d.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/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e236c1bce14d0225438e4ef85102076.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3722a16503ee447ab3a165bb44c83f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb6101e45f8d7013bc3dc4197188c0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/501c4a0116d95a3f3833975c2f1430d5.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb6101e45f8d7013bc3dc4197188c0c.png)
(2)将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb9a65be6d31d8c9625a92cf6dfda0d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
更新时间:2024-05-10 10:51:35
|
相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】如图,在平面坐标系
中,点A的坐标为
,点
的横坐标为
,将点
绕点
旋转,使它的对应点
恰好落在
轴上(不与
点重合);再将点
绕点
逆时针旋转
得到点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/d9c76e29-3a1e-42f7-9f56-93ec46dd02f7.png?resizew=153)
(1)画出图形(保留作图痕迹),直接写出点
和点
的坐标;
(2)求经过
三点的抛物线的表达式.
(3)将这个二次函数的图象沿y轴向下平移,请回答:当向下平移 个单位时,所得到的新的函数图象与
轴的两个交点之间的距离为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/d9c76e29-3a1e-42f7-9f56-93ec46dd02f7.png?resizew=153)
(1)画出图形(保留作图痕迹),直接写出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)求经过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce7af7c5df749c6fa9bbe87faa72c66d.png)
(3)将这个二次函数的图象沿y轴向下平移,请回答:当向下平移 个单位时,所得到的新的函数图象与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图1放置的木板余料,下方边缘
为
,上方边缘呈抛物线形状,最大高度为
.如图2,建立平面直角坐标系,
在
轴上,
轴正好是此木板的对称轴.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/097966d8-72a0-42ff-89b2-886e65d9e2ea.png?resizew=267)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/ecc0d062-5439-4ccd-98e3-93afadec75d3.png?resizew=305)
(1)求木板上方边缘对应的抛物线的函数表达式;
(2)如图3,若从此木板中切割出矩形
,且边
在
轴上,求此矩形的最大周长;
(3)若从此木板中横向切割出短边为
的矩形木板若干块(矩形的长边与
轴共线或平行),然后拼接成一个短边为
的矩形,如何切割才能使拼接后的矩形的长边最长?请在备用图上画出此时的切割方案,并直接写出拼接后矩形长边的最长长度.(结果保留根号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a29dc67d489b45471e5179e543649e80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b178474bc9008e83b4661dcfbf4e87b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/097966d8-72a0-42ff-89b2-886e65d9e2ea.png?resizew=267)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/ecc0d062-5439-4ccd-98e3-93afadec75d3.png?resizew=305)
(1)求木板上方边缘对应的抛物线的函数表达式;
(2)如图3,若从此木板中切割出矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a24ee1f52c7638776aa93f72184c877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a459f78e4a3516d8a8535290ede7f386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)若从此木板中横向切割出短边为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da9429d1238ea3e979dd0de49dd2b48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da9429d1238ea3e979dd0de49dd2b48.png)
您最近一年使用:0次
解答题-应用题
|
适中
(0.65)
【推荐1】一次足球训练中,小华从球门正前方
的A处射门,足球射向球门的运行路线呈抛物线.当球飞行的水平距离为
时,球达到最高点,此时球离地面
.已知球门高
为
,现以O为原点建立如图所示直角坐标系.
(2)若防守队员小明正在抛物线对称轴的左侧加强防守,他的最大起跳高度是
,小明需要站在离球门距离多远的地方才可能防守住这次射门?
(3)在射门路线的形状、最大高度均保持不变情况下,适当靠近球门进球的把握会更大,小华决定将足球向球门方向移动一定距离后再射门,他最多可以向球门移动__________.
①
;②
;③
.(填序号即可,
2.5922).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a814b291aa15d92953a6584dee2ec91e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d568856b3349a45f8b95d4a6454a858.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9b7606a47cc0fb44933560bd9190bca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b361f3b9a9b6bee09a7323475521aa.png)
(2)若防守队员小明正在抛物线对称轴的左侧加强防守,他的最大起跳高度是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b56f6b72e7e919dd09ae73e8681e2e6.png)
(3)在射门路线的形状、最大高度均保持不变情况下,适当靠近球门进球的把握会更大,小华决定将足球向球门方向移动一定距离后再射门,他最多可以向球门移动__________.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7b6a0b7ebfe491f6b76827f5bb2edb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/005d5a05bdbe27001212eca9a1d5f0d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b503e63e24d85326a19e7e61a51e72db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce13e9e31e5aded61e5010f9051e0b2.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】已知二次函数
,
(1)若
,求函数的对称轴和顶点坐标.
(2)若函数图象向下平移一个单位,恰好与x轴只有一个交点,求a的值.
(3)若抛物线过点
,且对于抛物线上任意一点
都有
,若点
是这条抛物线上不同的两点,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec69ca31a5c599a3c235788a5fd52888.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
(2)若函数图象向下平移一个单位,恰好与x轴只有一个交点,求a的值.
(3)若抛物线过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d4124f83e94663cbf7cc169f2d98071.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56720e2f2b0ddd72156da495923698da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c6654220eb2d58e29d2cd135ddc20e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f21414b25494aab48d458b3589cd6e86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83f9608fc21f1c5480bed9fadd0908a5.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐1】如图①,抛物线
经过点
,点
和点
,它的对称轴为直线
,顶点为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/6/385fbca8-8413-474e-bd54-b012bf8970c7.png?resizew=221)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/6/c2d595cd-880b-41cb-a67a-044ef497fc10.png?resizew=206)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/6/24d6eecb-c3dd-41a0-ae0e-facac4dc395f.png?resizew=196)
(1)求该抛物线的表达式;
(2)如图②,点
是直线
下方该抛物线上的一个动点,连接
、
、
,当
的面积取得最大值时,求点
的坐标;
(3)如图③,点
是直线
下方该抛物线上的一个动点,过
点作
直线
于
,连接
,当以
、
、
为顶点的三角形与
相似时,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a525534689bd2701205d4ab17574c39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c850811ba59a05e945a665196539a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0ec7f84f716a316ec92d133927666c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/6/385fbca8-8413-474e-bd54-b012bf8970c7.png?resizew=221)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/6/c2d595cd-880b-41cb-a67a-044ef497fc10.png?resizew=206)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/6/24d6eecb-c3dd-41a0-ae0e-facac4dc395f.png?resizew=196)
(1)求该抛物线的表达式;
(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/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9524e3810e06dc781285f1289e75d653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)如图③,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7ffcd1925a2b1259221c6a476152f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,二次函数
的图象(抛物线)与
轴交于
,且当
和
时所对应的函数值相等.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/6/491f9004-7f04-40aa-a500-b96c7f986422.png?resizew=198)
(1)求此二次函数的表达式;
(2)设抛物线与
轴的另一交点为点
,与
轴交于点
,在这条抛物线的对称轴上是否存在点
,使得
的周长最小?如果存在,求出
点的坐标;如果不存在,请说明理由.
(3)设点
在第二象限,且在抛物线上,当
的面积最大,求此时点
的坐标及
的面积.
![](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/a8748dc55e2f45bc37fc4d84d7310f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/6/491f9004-7f04-40aa-a500-b96c7f986422.png?resizew=198)
(1)求此二次函数的表达式;
(2)设抛物线与
![](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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/644f63756fe9251e65cc14e1ce9723d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad3e2b2689dfe97ec82d473ab6cf469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad3e2b2689dfe97ec82d473ab6cf469.png)
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