已知直线
:
与
轴交于点
,与
轴交于点
.将直线沿
轴翻折,得到一个新函数的图象
,(图
),直线
与
轴交于点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求新函数的图象
,的解析式;
(2)在直线
上一动点
, 连接
, 试求
的面积
关于
的函数解析式,并写出自变量的取值范围:
(3)如图
,过点
画平行于
轴的直线
,
①求证:
是等腰直角三角形;
②将直线
沿
轴方向平移,当平移到恰当距离的时候,直线
与
轴交于点
,与y轴交于点
,在直线
上是否存在点
(纵、横坐标均为整数),使得
是等腰直角三角形,若存在,请直接写出所有符合条件的点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24edd2a1d145627d07330524017daf5c.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/d053b14c8588eee2acbbe44fc37a6886.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/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求新函数的图象
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
(2)在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d51b617659e04083178dd7fa4e848f62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c5b84e1529439db61d8886a524242e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88a69c6cc1da99e6c5511d77ec8ddd35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3814287dbb60d478bffc5366f9928b.png)
②将直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/203916e4cbc6e0919128bee0283bd2e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2020/12/9/2610732195749888/2613365559672832/STEM/6e5ebfff-c737-4b6d-9431-5680a6be93f3.png?resizew=470)
更新时间:2020-12-13 16:48:45
|
相似题推荐
解答题-问答题
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名校
【推荐1】如图,在
中,
,
,
,
于点
.点
从点
出发,沿线段
向点
运动,点
从点
出发,沿线段
向点
运动,两点同时出发,速度都为每秒1个单位长度,当点
运动到
时,两点都停止运动.设运动时间为
秒.
(1)用含
的代数式分别表示线段
_______________、
_______________.
(2)在运动过程中是否存在某一时刻
,使得
?若存在,求出
的值;若不存在,请说明理由.
(3)是否存在某一时刻
,使得
为直角三角形?若存在,求出所有满足条件的
的值;若不存在,请说明理由.
![](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/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/20/c7d29fe8-9b73-4384-aea9-443438504f79.png?resizew=360)
(1)用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc2ddabf078c1b683b067eb1aee1969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1772209a569f87d0539b5d7871d0834.png)
(2)在运动过程中是否存在某一时刻
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/652f38eff016afc850e3959234d63dbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)是否存在某一时刻
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87b2f781cafa7989d81f9bf8c42b150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐2】如图,将△ABC绕点A逆时针旋转90°得到△ADE,将BC绕点C顺时针旋转90°得CG,DG交EC于O点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/3db951d7-8772-489d-b14b-47f4aa2fe1c1.png?resizew=431)
(1)连接CD、EG,求证:四边形CDEG是平行四边形;
(2)若∠ABC=135°,AC=
,求DG的长;
(3)若∠ABC=90°,且
时,求出
的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/3db951d7-8772-489d-b14b-47f4aa2fe1c1.png?resizew=431)
(1)连接CD、EG,求证:四边形CDEG是平行四边形;
(2)若∠ABC=135°,AC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7881094ce2f907c3aaf664318ecd3e2d.png)
(3)若∠ABC=90°,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd6fcac8bd0e4c3f8bc6b045a86a86f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2465ee1fec12351943f15055dfd6ec73.png)
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【推荐1】如图,已知抛物线经过A(4,0),B(1,0),C(0,﹣2)三点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/f7c52440-3e7c-4f20-92b0-5876a889faf7.png?resizew=231)
(1)求该抛物线的解析式;
(2)在直线AC上方的该抛物线上是否存在一点D,使得△DCA的面积最大,若存在,求出点D的坐标及△DCA面积的最大值;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/f7c52440-3e7c-4f20-92b0-5876a889faf7.png?resizew=231)
(1)求该抛物线的解析式;
(2)在直线AC上方的该抛物线上是否存在一点D,使得△DCA的面积最大,若存在,求出点D的坐标及△DCA面积的最大值;若不存在,请说明理由.
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【推荐2】在平面直角坐标系
中,对于线段
,直线l和图形W给出如下定义:线段
关于直线l的对称线段为
分别是M,N的对应点),若
与
均在图形W内部(包括边界),则称图形W为线段
关于直线l的“对称封闭图形”.如图,点
.
概念理解:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/28/68f3575d-eb3d-47af-a14a-9b66e6361008.png?resizew=284)
(1)线段
关于y轴的对称线段
点坐标是______;
(2)已知图形
:以线段
为边的等边三角形,
:以O为对角线交点且边长为2的正方形,在
中,线段
关于y轴的“对称封闭图形”是______;
应用拓展:
(3)以O为对角线交点的正方形
的边长为4,各边与坐标轴平行,若正方形
是线段
关于直线
的“对称封闭图形”,求b的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d124e88d8f6096e45c35621a4d70b00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f9b255a8da2b914a84a848e0ec499d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f5f262e97b3c104011c576ae68ebc7.png)
概念理解:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/28/68f3575d-eb3d-47af-a14a-9b66e6361008.png?resizew=284)
(1)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f155f746197b815cd9038dba1cd5272f.png)
(2)已知图形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3ff0b0fea1cb642d3f6be77a1ff32f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6eaa137a2290a9a9ec7ad635d17dbb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/995386e3233c1da3b1dfeab3c96782a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
应用拓展:
(3)以O为对角线交点的正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07565f10847840e0fb07b05218ad17fa.png)
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【推荐1】已知在△ABC中,AB=AC,∠BAC=α,直线l经过点A(不经过点B或点C),点C关于直线l的对称点为点D,连接BD,CD.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/24/2e929079-8f71-48b0-a107-bede14dbcb19.png?resizew=543)
(1)如图1,
①求证:点B,C,D在以点A为圆心,AB为半径的圆上;
②直接写出∠BDC的度数(用含α的式子表示)为 ;
(2)如图2,当α=60°时,过点D作BD的垂线与直线l交于点E,求证:AE=BD;
(3)如图3,当α=90°时,记直线l与CD的交点为F,连接BF.将直线l绕点A旋转的过程中,在什么情况下线段BF的长取得最大值?若AC=2
a,试写出此时BF的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/24/2e929079-8f71-48b0-a107-bede14dbcb19.png?resizew=543)
(1)如图1,
①求证:点B,C,D在以点A为圆心,AB为半径的圆上;
②直接写出∠BDC的度数(用含α的式子表示)为 ;
(2)如图2,当α=60°时,过点D作BD的垂线与直线l交于点E,求证:AE=BD;
(3)如图3,当α=90°时,记直线l与CD的交点为F,连接BF.将直线l绕点A旋转的过程中,在什么情况下线段BF的长取得最大值?若AC=2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e051d14fd6a787387995331f5e6d026.png)
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【推荐2】四边形
是由等边
和顶角为
的等腰
拼成,将一个
角的顶点放在点D处,将
角绕D点旋转,该
角两边分别交直线
于点M、N,交直线
于点F,E.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/19/ea2d40b4-f4b2-4d0a-a85d-3ecec845cf83.png?resizew=312)
(1)当点M,N分别在边
上时(如图1),直接写出
之间的数量关系 ;
(2)当点M,N分别在边
的延长线上时(如图2),猜想线段
之间有何数量关系?请进行证明;
(3)在(2)的条件下,若
,请你求出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae33911e41aa2f7004cc01e336f96bf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b74dbbe1de2373e9fbd9e2f8dd1547.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/19/ea2d40b4-f4b2-4d0a-a85d-3ecec845cf83.png?resizew=312)
(1)当点M,N分别在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3df3bb2b13a621875de5869b6aa7f904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d8b941fc5e7a853de6f280a226055f2.png)
(2)当点M,N分别在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9edcfc033a70d344d0c38ad59176da3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d8b941fc5e7a853de6f280a226055f2.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddc7f2a131b31668c3255047df0c3fdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adaeda39e176e4c2d1ce294267eac57.png)
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【推荐3】问题情境:
为了探究图形动点过程中蕴含的数学知识和思想方法,数学活动课上,老师给出了如下问题.如图,在正方形
中,点
是对角线
上的动点,点
在射线
上,且
,连接
,
为
的中点.
如图1,当点
在线段
上时,请你观察、探究线段
与
的位置和数量关系,并直接写出这一关系;
类比迁移:
如图2,当点
在线段
上运动时(点
不与点
重合),请你判断图1中探究的线段
与
的位置和数量关系在图2中是否仍然成立,并说明理由;
深度探究:
小明探究发现:“图1,图2中的线段
之间都具有
的数量关系”.请你判断小明的结论是否正确,若正确,就图2给出证明,若不正确,请说明理由.
为了探究图形动点过程中蕴含的数学知识和思想方法,数学活动课上,老师给出了如下问题.如图,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa4144f6ce108867d237f6891b4f4954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
如图1,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
类比迁移:
如图2,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e147d9422c4cbfb1afb9cb4029f5eaf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
深度探究:
小明探究发现:“图1,图2中的线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ee14a4170fde036a014e535bc625fcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d00a409a433643f49ea8fc329bc7f29f.png)
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