抛物线
的图象如图所示,点О为原点,点A在y轴的正半轴上,点B、C在函数图象上,四边形
为正方形,求点B的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108c18cb76d7d34b05c991a644c8b136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5241e0e07a9cd48e4f853405dca1a03.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/26/cf8d71ae-4c49-4694-9926-d62bac81d892.png?resizew=132)
更新时间:2023-08-24 23:00:25
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解答题-作图题
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适中
(0.65)
名校
【推荐1】已知二次函数
,
,
,请回答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/a72c46b0-86d6-4ec9-b038-b5d21e0c50bc.png?resizew=219)
(1)写出抛物线
,
,
的顶点坐标,开口方向和对称轴;
(2)在下面的平面直角坐标系中画出二次函数
,
,
的图像
(3)请分别说明通过怎样的平移,可以由抛物线
得到抛物线
和
?(此问答案填在第一问的表格中)
(4)根据三个函数的图像写出这三个函数的两条共同性质
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36ee07ef9b44ee997d16671f354c3bd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827db616f67d38afb0cdc3b0084742a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c372775bffed900e0864b711b1ec8d5.png)
抛物线 | 开口方向 | 对称轴 | 顶点坐标 | (3)由![]() |
![]() | ||||
![]() | ||||
![]() |
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/a72c46b0-86d6-4ec9-b038-b5d21e0c50bc.png?resizew=219)
(1)写出抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36ee07ef9b44ee997d16671f354c3bd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827db616f67d38afb0cdc3b0084742a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c372775bffed900e0864b711b1ec8d5.png)
(2)在下面的平面直角坐标系中画出二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36ee07ef9b44ee997d16671f354c3bd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827db616f67d38afb0cdc3b0084742a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c372775bffed900e0864b711b1ec8d5.png)
(3)请分别说明通过怎样的平移,可以由抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36ee07ef9b44ee997d16671f354c3bd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827db616f67d38afb0cdc3b0084742a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c372775bffed900e0864b711b1ec8d5.png)
(4)根据三个函数的图像写出这三个函数的两条共同性质
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解答题-证明题
|
适中
(0.65)
【推荐2】用代数推理的方法证明下列两个结论:
(1)设
是一个四位数,若
可以被3整除,则这个数可以被3整除.
(2)已知函数
. 求证:当
>0时,y随x的增大而增大.
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa502bcd6d26e6bd96a61048105bc17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6bb99e2251df1777c5288d603170bd2.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ccbf79da6ad7e3709d6fa72efb756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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解答题-证明题
|
适中
(0.65)
【推荐1】在正方形
中,点E 是
的中点.
![](https://img.xkw.com/dksih/QBM/2023/5/22/3243278694596608/3282054337200128/STEM/4303cb4f1e294749b39463c01ac42794.png?resizew=241)
(1)如图 1,若
,求
的长.
(2)如图 2,点F 是线段
上的一点,且
,求证:
是直角三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2023/5/22/3243278694596608/3282054337200128/STEM/4303cb4f1e294749b39463c01ac42794.png?resizew=241)
(1)如图 1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(2)如图 2,点F 是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1d0d6dc13cf6b6d1a0e0c1d55ad0ba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
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解答题-证明题
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适中
(0.65)
【推荐2】如图,
是正方形
内一点,
是等边三角形,连接
,
,延长
交
于点
.
![](https://img.xkw.com/dksih/QBM/2021/5/28/2730923726249984/2797901342572544/STEM/744b29aa-9aea-4f4d-854f-a0ee6b7b0c5b.png)
(1)求证:
;
(2)求
的度数;
(3)若正方形的边长为4,连接
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2021/5/28/2730923726249984/2797901342572544/STEM/744b29aa-9aea-4f4d-854f-a0ee6b7b0c5b.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b928663636f2a69771e1c7cf3e5ed319.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90026b96116424a245b335b1adb886b.png)
(3)若正方形的边长为4,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
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解答题-问答题
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适中
(0.65)
【推荐1】抛物线
与x轴交于A、B两点(点A在点B的左侧),且A(﹣1,0),B(4,0),与y轴交于点C.连接BC,以BC为边,点O为中心作菱形BDEC,点P是x轴上的一个动点,设点P的坐标为(m,0),过点P作x轴的垂线交抛物线于点Q,交BD于点M.
(2)x轴上是否存在一点P,使△PBC为等腰三角形?若存在,请直接写出点P的坐标;若不存在,请说明理由;
(3)当点P在线段OB上运动时,试探究:当m为何值时,四边形CQMD是平行四边形?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9553fb9beb9ed49ea5f7a0f077884d.png)
(2)x轴上是否存在一点P,使△PBC为等腰三角形?若存在,请直接写出点P的坐标;若不存在,请说明理由;
(3)当点P在线段OB上运动时,试探究:当m为何值时,四边形CQMD是平行四边形?请说明理由.
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解答题-证明题
|
适中
(0.65)
【推荐2】如图,抛物线
与x轴分别相交于A,B两点(点A在点B的左侧),C是
的中点,平行四边形
的顶点D,E均在抛物线上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/26/62ae711f-7a3c-47a5-a3f1-26b83fc1a5aa.png?resizew=406)
(1)直接写出点C的坐标;
(2)如图(1),若点D的横坐标是
,点E在第三象限,平行四边形
的面积是13,求点F的坐标;
(3)如图(2),若点F在抛物线上,连接
,求证:直线
过一定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/584bec8a7fc89daf2e9a6e6741604629.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/26/62ae711f-7a3c-47a5-a3f1-26b83fc1a5aa.png?resizew=406)
(1)直接写出点C的坐标;
(2)如图(1),若点D的横坐标是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
(3)如图(2),若点F在抛物线上,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
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