1 . 综合与探究
如图,已知直线
与x轴,y轴交于B,A两点,抛物线
经过点A,B,点P为线段
上一个动点,过点P作垂直于x轴的直线交抛物线于点N,交直线
于点M,设点P的横坐标为t.
(1)求抛物线解析式;
(2)当
,t的值为___________;
(3)若点N到直线
的距离为d,求d的最大值;
(4)在y轴上是否存在点Q,使
是以
为腰的等腰直角三角形?若存在,请直接写出点Q的坐标;若不存在,请说明理由.
如图,已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc9118cc77fc0a045337745890e50cad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d62e8aadaadebf1454fde21a390ebdea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/15/7d6266e0-103d-463e-997f-e3139d1fd730.png?resizew=444)
(1)求抛物线解析式;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eff3adba01bf17140e9b2f532a416bb4.png)
(3)若点N到直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
(4)在y轴上是否存在点Q,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5686478d868d87e7253ea56a6e3eace6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07377d977ef6a8f518b3004564544e5b.png)
您最近一年使用:0次
2 . 如图,已知抛物线
交
轴于
、
两点交
轴于点
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/8/e4827dde-5623-4a58-934f-0b5a8ddc2028.png?resizew=258)
(1)求抛物线的解析式;
(2)若
为抛物线对称轴右侧一点,
,求
点的横坐标;
(3)若
为
轴上一动点,作直线
,
,分别交抛物线于点
,
,若
,
两点的横坐标分别为
,
,试探究
,
之间的数量关系.
![](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/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.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/49c8dbc31b2e14067ef2f34b4e25f114.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/8/e4827dde-5623-4a58-934f-0b5a8ddc2028.png?resizew=258)
(1)求抛物线的解析式;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cf8f83cf6b7e016ed75f97a1b41fd99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d9b798a71ae94839e1ebb0a644202e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4083c581c6027c4b2ae7e3b3749f485.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
2023-02-06更新
|
290次组卷
|
2卷引用:湖北省武汉市华一寄宿学校2022-2023学年九年级上学期期末考试数学试题
3 . 我们在学习了《浙教版数学九年级上册》
探究活动,“已知:如图为一座拱桥的示意图,当水面宽为
时,桥洞顶部离水面
已知桥洞的拱形是抛物线”,现以水平方向
为
轴,若小明同学以
为顶点求出了函数表达式是
;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/dae1c644-76a4-4498-bda5-e02609ba86e2.png?resizew=633)
探究一:
(1)若小红同学以
为顶点求出了函数表达式是__________.
(2)在(1)条件下,求出该抛物线在水面
中的倒影所在抛物线函数表达式为____________.
(3)一艘宽为
米,高出水面
米的货船,能否从桥下通过?
探究二:
(4)若已知桥洞的拱形是圆的一部分,当水面宽为
时,桥洞顶部离水面
,该圆半径为__________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a244be5f31a2ffe9cfb78c114a487402.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e978c77cb0d7eff794447241e9829867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e7854968bbf6576a1fd9926ee0d4d63.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bea9d00afeb7945376fc89a0ca354360.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/dae1c644-76a4-4498-bda5-e02609ba86e2.png?resizew=633)
探究一:
(1)若小红同学以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)在(1)条件下,求出该抛物线在水面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)一艘宽为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
探究二:
(4)若已知桥洞的拱形是圆的一部分,当水面宽为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e978c77cb0d7eff794447241e9829867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e7854968bbf6576a1fd9926ee0d4d63.png)
您最近一年使用:0次
2023-01-13更新
|
216次组卷
|
3卷引用:浙江省丽水市莲都区文元教育集团2022-2023学年九年级上学期期中数学试题
4 . 如图,抛物线
交
轴于
,
两点,与
轴交于点
,连接
,
.
为线段
上的一个动点,过点
作
轴,交抛物线于点
,交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/20/63f639e8-2feb-47cb-9d34-8c211b2e31ef.png?resizew=253)
(1)求抛物线的表达式;
(2)过点
作
,垂足为点
,设
点的坐标为
,请用含
的代数式表示线段
的长,并求出当
为何值时,
有最大值,最大值是多少?
(3)试探究点
在运动过程中,是否存在这样的点
,使得以
,
,
为顶点的三角形是等腰三角形,若存在,请求出此时点
的坐标;若不存在,请说明理由.
(4)在(2)的条件下,直线
上有一动点
,连接
,将线段
绕点
逆时针旋转
度,使点
的对应点
恰好落在该抛物线上,则点
的坐标是 .(直接写出结果)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ceba6b11658f2cc227b1f550ba25c3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ee80939187a84e1863eeb192a301c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7291b3d921f595f28960abcdce6dfbed.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3a3db6d96518255f96ad7fc1ac98f4.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/20/63f639e8-2feb-47cb-9d34-8c211b2e31ef.png?resizew=253)
(1)求抛物线的表达式;
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3a6922808e9b59352c25c341cf23851.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/8649ce18c628d0e03e72cef541f8284f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
(3)试探究点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(4)在(2)的条件下,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25b2e7aa38de090bb39fa058323d2eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25b2e7aa38de090bb39fa058323d2eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a17161b28b6ad8f57abc5b11e1b6c671.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
您最近一年使用:0次
名校
5 . 问题提出
(1)如图①,
中,点
在边
上,且
,过
作
,交
于点
,若
,则
______;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/ae105c88-827d-4252-aa4f-f7387b11cfee.png?resizew=113)
问题解决
(2)如图②,矩形
中,点
、
分别在边
、
上,且
,过
作
,交
于点
,连接
,交
于点
.若
,
,求
的最大值;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/fc4a2b17-af9e-4bea-ac5c-309c612e45bd.png?resizew=123)
问题探究
(3)如图,正方形
中,点
、
、
、
分别在边
、
、
、
上,且
,
、
相交于点
,
,已知正方形
的边长为16,
长为20,
的面积是否存在最大值?若存在,请求出
的面积的最大值;若不存在,请说明理由.
(1)如图①,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/8aa694fa8c2a39f0b9e9abdde51805e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.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/b939af5ba06e279cce39396aaf0fae06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404728d0ea2699c71e674f30dd984abd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/ae105c88-827d-4252-aa4f-f7387b11cfee.png?resizew=113)
问题解决
(2)如图②,矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18a336c9ad698d77e7183884523da8a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c05420ab262912cf41f46bc3b0af070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb262f3529a3e84959fe594b6628c77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/fc4a2b17-af9e-4bea-ac5c-309c612e45bd.png?resizew=123)
问题探究
(3)如图,正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c05420ab262912cf41f46bc3b0af070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7946299d2c7bccb8033c29aea0038ab4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cd794a8c6c6c1351a5bb0783a0c40e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cd794a8c6c6c1351a5bb0783a0c40e6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/8b405adb-a9a3-4026-98b0-dd913eddc8ac.png?resizew=105)
您最近一年使用:0次
2022-12-30更新
|
75次组卷
|
2卷引用:陕西省西安交通大学附属中学2022-2023学年九年级上学期第二次月考数学试卷
6 . 如图,抛物线
与x轴交于
两点,与y轴负半轴交于点C.
(2)如图1,点D是抛物线上第三象限内的一点,连接
,若
为锐角,且
,求点D的横坐标
的取值范围;
(3)如图2,经过定点P作一次函数
与抛物线交于M,N两点.试探究
是否为定值?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780b1f275d80b1f36ae4c4eecb737f6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0b300053931848c4e00f8c40cfe2dd.png)
(2)如图1,点D是抛物线上第三象限内的一点,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd0e9dcf6dd1a64661c50ce67497c59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97d6ab4479fca30268660739ec6852c3.png)
(3)如图2,经过定点P作一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56053f020f1a061105ce081213dc679b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1140f9dbba98f88ae58d9ec80fd4a001.png)
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2023-04-02更新
|
83次组卷
|
3卷引用:黑龙江省大庆市靓湖学校2022-2023学年九年级下学期三月数学教学质量检测试题
7 . 在
中,
,
是
的中点,作
.分别交
,
于点
,
,连接![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/1/bb10b4c0-d04a-457c-ae5c-0093ff5d67a6.png?resizew=400)
(1)【尝试探究】如图1,若
,求证
;
(2)【深入研究】如图2,试探索(1)中的结论在一般情况下是否仍然成立;
(3)【解决问题】如图3,若
,
,点
,
,
,
在同一个圆上,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1167767fd847678ef279f3e637f2828.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/1/bb10b4c0-d04a-457c-ae5c-0093ff5d67a6.png?resizew=400)
(1)【尝试探究】如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32aa6645c528e98c15f9372381d70f62.png)
(2)【深入研究】如图2,试探索(1)中的结论在一般情况下是否仍然成立;
(3)【解决问题】如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba70863115b0947e98214a7b2512167d.png)
您最近一年使用:0次
2023-03-30更新
|
435次组卷
|
4卷引用:2023年陕西省咸阳市渭城区中考一模数学试题
2023年陕西省咸阳市渭城区中考一模数学试题2023年湖北省黄冈市浠水县方铺中学中考一模数学试题(已下线)专题19 最值问题-学易金卷:2023年中考数学一模试题分项汇编(全国通用)(已下线)2023年陕西省一模(几何综合)
8 . 综合与探究
已知二次函数
.
![](https://img.xkw.com/dksih/QBM/2022/11/29/3120211904364544/3125896412446720/STEM/0f52f5ac283248fabf8a7304ae9cda26.png?resizew=261)
(1)其图象的对称轴为直线____________.
(2)若
,且该二次函数的图象经过点
,试比较c,d,e,f的大小,并说明理由.
(3)若该二次函数的图象经过点
,且抛物线与x轴所围成的封闭图形内有4个整数点(不包括边界),求出a的取值范围.(注:横纵坐标均为整数的点为整数点)
已知二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b81349deba032f1b07ef11f5b1c782.png)
![](https://img.xkw.com/dksih/QBM/2022/11/29/3120211904364544/3125896412446720/STEM/0f52f5ac283248fabf8a7304ae9cda26.png?resizew=261)
(1)其图象的对称轴为直线____________.
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/250e2393eccba35e6e98521bad018a66.png)
(3)若该二次函数的图象经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1946e3d90d953d30a8cce367b06c394e.png)
您最近一年使用:0次
解题方法
9 . 有一组邻边相等的凸四边形叫做“乐学四边形”,如菱形,正方形等都是“乐学四边形”,这一组相等的邻边叫做“善思线段”.抛物线y=ax2+bx+c与x轴交于A、B两点(点A在点B的左侧),与y轴交于点C,抛物线的顶点为点D.
(1)当a=﹣
,b=
,c=5,请判断四边形COBD是否为“乐学四边形”,如果是,请说明理由并指出“善思线段”,如果不是,请说明理由.
(2)在第(1)问的条件下,试探究在第一象限内,抛物线上是否存在一点E使得S△ABE=
,若存在,请求出点E的横坐标,若不存在,请说明理由.
(3)四边形COBD为“乐学四边形”,且CD=OC.抛物线还满足:
①a<0,ab≠0,c=2;
②△ABD为等腰直角三角形;
点P(x0,y0)是抛物线y=ax2+bx+c上任意一点,且t=y0﹣
x0.若t≤m+
恒成立,求m的最小值.
(1)当a=﹣
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56b32a0aea3308e1678a290ccb84b741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
(2)在第(1)问的条件下,试探究在第一象限内,抛物线上是否存在一点E使得S△ABE=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e49fe19a2a8af9ffc982ab5e1f7e6ff2.png)
(3)四边形COBD为“乐学四边形”,且CD=OC.抛物线还满足:
①a<0,ab≠0,c=2;
②△ABD为等腰直角三角形;
点P(x0,y0)是抛物线y=ax2+bx+c上任意一点,且t=y0﹣
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49d2b79bda5c0ff8119732f9a56c4abb.png)
![](https://img.xkw.com/dksih/QBM/2021/8/26/2794240639983616/2794506316488704/STEM/90b69b996fa64b61923becb82c4e824d.png?resizew=238)
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10 . 综合与探究
如图,已知点B(3,0),C(0,-3),经过B.C两点的抛物线y=x2-bx+c与x轴的另一个交点为A.
![](https://img.xkw.com/dksih/QBM/2021/12/27/2881593795026944/2887084189556736/STEM/7e72c6bb-a1e7-4a22-99a9-4a6ecfd87556.png?resizew=270)
(1)求抛物线的解析式;
(2)点D在抛物线的对称轴上,当△ACD的周长最小时,求点D的坐标.
(3)若点E(2,-3),在坐标平面内是否存在点P,使以点A,B,E,P为顶点的四边形是平行四边形?若存在,请直接写出点P的坐标;若不存在,请说明理由.
如图,已知点B(3,0),C(0,-3),经过B.C两点的抛物线y=x2-bx+c与x轴的另一个交点为A.
![](https://img.xkw.com/dksih/QBM/2021/12/27/2881593795026944/2887084189556736/STEM/7e72c6bb-a1e7-4a22-99a9-4a6ecfd87556.png?resizew=270)
(1)求抛物线的解析式;
(2)点D在抛物线的对称轴上,当△ACD的周长最小时,求点D的坐标.
(3)若点E(2,-3),在坐标平面内是否存在点P,使以点A,B,E,P为顶点的四边形是平行四边形?若存在,请直接写出点P的坐标;若不存在,请说明理由.
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