名校
1 . 数学活动课上,老师提出问题:如图1,有一张长
,宽
的长方形纸板,在纸板的四个角裁去四个相同的小正方形,然后把四边折起来,做成一个无盖的盒子,问小正方形的边长为多少时,盒子的体积最大.
下面是探究过程,请补充完整:
(1)设小正方形的边长为
,体积为
,根据长方体的体积公式得到
和
的关系式为______;
(2)确定自变量
的取值范围是______;
(3)列出
与
的几组对应值.
(说明:表格中相关数值均精确到0.1)
(4)为观察
与
之间的关系,建立坐标系(图2),以
为横坐标,
为纵坐标,描出表中数据对应的点,并用平滑的曲线连接它们;
(5)结合画出的函数图象,解决问题:要使得长方体盒子的体积最大,小正方形的边长约为______
.(精确到0.1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14be107aa214cf044d619bd78c4a1653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e83bdd7c312d9a7d5a81aa5e9ecf2f9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/15/189e7bda-f5a5-4ba2-b6fa-45bd333907cf.jpg?resizew=270)
下面是探究过程,请补充完整:
(1)设小正方形的边长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d0abc998ec2b780be50b061c3de05c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d64ca51492bd2deaa93d0c0f1f9490a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)确定自变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)列出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![]() | … | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | 1 | ![]() | ![]() | … |
![]() | … | 1.3 | 2.2 | 2.7 | 3.0 | 2.8 | 2.5 | 1.5 | 0.9 | … |
(4)为观察
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(5)结合画出的函数图象,解决问题:要使得长方体盒子的体积最大,小正方形的边长约为______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af089fd292ba69ddef79e9ab1cac77ca.png)
您最近一年使用:0次
名校
2 . 数学活动课上,老师提出一个探究问题:
制作一个体积为
,底面为正方形的长方体包装盒,当底面边长为多少时,需要的材料最省(底面边长不超过3
,且不考虑接缝).
某小组经讨论得出:材料最省,就是尽可能使得长方体的表面积最小.
下面是他们的探究过程,请补充完整:
(1)设长方体包装盒的底面边长为x
,表面积为
、可以用含x的代数式表示长方体的高为
.根据长方体的表面积公式:长方体表面积=2×底面积+侧面积.
得到y与x的关系式:_________(
);
(2)列出y与x的几组对应值:(说明:表格中相关数值精确到十分位)
(3)在下面的平面直角坐标系xOy中,描出以补全后的表中各对对应值为坐标的点,画出该函数的图象:
(4)结合画出的函数图象,解决问题:
长方体包装盒的底面边长约为_______
时,需要的材料最省.
制作一个体积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1957d3858d7b28798d490d6937a5854f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0e58dba2ae5e313df1635fb2111fe40.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/17/f2a766ee-470e-472e-85a3-3e6d5a8a1396.jpg?resizew=92)
某小组经讨论得出:材料最省,就是尽可能使得长方体的表面积最小.
下面是他们的探究过程,请补充完整:
(1)设长方体包装盒的底面边长为x
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0e58dba2ae5e313df1635fb2111fe40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e0e081d9f92eb98efeecd1a0770640.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bdc0a6fde8248ec5bdde2a3e1dc6dcc.png)
得到y与x的关系式:_________(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c37668a23bb211627f77ab53f21563c.png)
(2)列出y与x的几组对应值:(说明:表格中相关数值精确到十分位)
x/![]() | … | 0.5 | 1.0 | 1.5 | 2.0 | 2.5 | 3.0 |
![]() | … | 80.5 | 42.0 | 31.2 | ① | 28.5 | 31.3 |
(4)结合画出的函数图象,解决问题:
长方体包装盒的底面边长约为_______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0e58dba2ae5e313df1635fb2111fe40.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/17/1f5cdd32-c143-4e24-9834-751964cfab69.jpg?resizew=213)
您最近一年使用:0次
2023-10-16更新
|
212次组卷
|
2卷引用:北京市师达中学2023-2024学年九年级上学期月考数学试题
3 . 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
|
291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
4 . 如图,抛物线
过点A(−1,0),点B(3,0),与y轴负半轴交于点C,且
,抛物线的顶点为D,对称轴交x轴于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/1948e000-fbe9-4ce9-a564-73a2b76bc451.png?resizew=343)
(1)求抛物线的函数表达式;
(2)求直线BC的函数表达式;
(3)若点P是抛物线上一点,过点P作PQ⊥x轴交直线BC于点Q,试探究是否存在以点E,D,P,Q为顶点的平行四边形.若存在,求出点P坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df74a82d52fa9d42780887e48fba8d08.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/1948e000-fbe9-4ce9-a564-73a2b76bc451.png?resizew=343)
(1)求抛物线的函数表达式;
(2)求直线BC的函数表达式;
(3)若点P是抛物线上一点,过点P作PQ⊥x轴交直线BC于点Q,试探究是否存在以点E,D,P,Q为顶点的平行四边形.若存在,求出点P坐标;若不存在,请说明理由.
您最近一年使用:0次
5 . 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
|
218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
名校
6 . 综合与探究
如图,在平面直角坐标系中,二次函数
的图象交x轴于A,B两点,交y轴于点C,点A的坐标为
,点B的坐标为
,以
,
为边作矩形
,且边
交二次函数的图象于点M.
(1)求二次函数的表达式.
(2)现有一条垂直于x轴的直线
在A,O两点间(不包括A,O两点)左右移动,分别交x轴于点E,交
于点F,交
于点P,交二次函数的图象于点Q,请用含a的代数式表示
的长.
(3)在(2)的条件下,连接
,则在
上方的二次函数的图象上是否存在这样的点Q,使得以Q,C,F为顶点的三角形和
相似?若存在,直接写出
的值;若不存在,请说明理由.
如图,在平面直角坐标系中,二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cb4b40809912acdd8cb10d14de171df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcbcd0aebdd8bd688d108834747009f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d439e428bc3bf8778c274dd683f4fde9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/8/dd4fc868-740e-498f-bded-bc6f277521d0.png?resizew=218)
(1)求二次函数的表达式.
(2)现有一条垂直于x轴的直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b53b86bd516400d6fa7dabb3603f31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f6927cc2a930203ac34366383e76ef.png)
(3)在(2)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350e954f629c1901a5cec03558319e46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099dd87a526391f830ac2a11e7d7ad56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
7 . 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
8 . 问题提出
(1)如图①,在
中,点
、
、
分别为边
、
、
的中点,
,
,
交
于点
,则
的长______ ;
问题探究
(2)如图②,在等腰直角
中,
,
,点
为线段
上一动点
点
不与点
、
重合
,以
为腰且在
的右侧作等腰直角
,
,
与
交于点
,连接
,求证:
;
问题解决
(3)如图是郊外一空地,为了美化生态环境,现要将这块地打造成一个公园,在空地一侧挖一个四边形的人工湖
,点
、
分别在边
、
上,且满足
,已知
,
,
,
,为了满足湖周边的建设用地需要,人工湖的面积需尽可能小,设
的长为
,四边形
的面积为
①求
与
之间的函数关系式;
②求人工湖面积的最小值及此时
的长.
(1)如图①,在
![](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/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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
问题探究
(2)如图②,在等腰直角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/04582116cd765fcc5a52f44279ad6c94.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/441dec590b47adc3678a291a3ec89a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb476b0dac9799c720354d30b3a85c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14bdb8b4d6fe23ee29822f26a2359080.png)
问题解决
(3)如图是郊外一空地,为了美化生态环境,现要将这块地打造成一个公园,在空地一侧挖一个四边形的人工湖
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb57291ac092f035cdfb6f03e45e91d0.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f32d96abaf9c6b806e19b21cbe54c02f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f59054721475d6dd099a43fabbe0c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d7d047ca5c751aa5d192f63016289d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5412c2c0baa2fc01485358af68d6e885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8288df5c66b22fcb3e95d97b7b66f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb57291ac092f035cdfb6f03e45e91d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f6ace8dcb27eebe90c43cb77e9afa7.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
②求人工湖面积的最小值及此时
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/14/ef008a9c-8e9b-414d-8476-c8aa4d5ce5ac.png?resizew=462)
您最近一年使用:0次
名校
9 . 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
10 . 如图,在矩形
中,点P是边上任意一点(点P不与B、C重合),连接
,作
,交
于点Q,若
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/1/68e90194-4948-41f6-ae57-4f75984aebe5.png?resizew=136)
(1)试证明:
;
(2)当
为多少时,
最长,最长是多少?
(3)试探究,是否存在一点P,使
是等腰直角三角形?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/287eb7b9d7d5b93b81550f9c9d54a9ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b4da8d254b7d76b7615d7f7cd824a3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/1/68e90194-4948-41f6-ae57-4f75984aebe5.png?resizew=136)
(1)试证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96897f11c3d6e435f8603168908cbddb.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
(3)试探究,是否存在一点P,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
您最近一年使用:0次
2023-03-29更新
|
100次组卷
|
2卷引用:2023年湖南省衡阳市衡山实验中学中考数学一模试卷