如图1,在矩形
中,
,
,动点
以每秒1个单位的速度,从点
出发.按
的顺序在边上运动.与点
同时出发的动点
以每秒
个单位的速度,从点
出发,在射线
上运动.当动点
运动到点
时,动点
、
都停止运动.连接
,设点
的运动时间为
秒,在运动过程中,
的面积记为
,三角形
的面积为
.
,
与
之间的函数关系式,并写出自变量
的取值范围;
(2)在如图2的平面直角坐标系中,画出为
,
的函数图象,并根据图象写出函数
的一条性质;
(3)根据图象直接写出当
时
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.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/97469dafabe980c0447732fe4e33898b.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/f89eef3148f2d4d09379767b4af69132.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/dad2a36927223bd70f426ba06aea4b45.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36aae82d53f2a35d2f95f467bd5b76cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5d8073385db872410ca88187bbb0d34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)在如图2的平面直角坐标系中,画出为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
(3)根据图象直接写出当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f409b04381ac46606949f869f7d640cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
更新时间:2024-01-21 17:46:41
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相似题推荐
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【推荐1】某星期天早晨,小华从家出发步行前往体育馆锻炼,途中在报亭看了一会儿报,如图所示是小华从家到体育馆这一过程中所走的路程
米
与时间
分
之间的关系.
体育馆离小华家_______米,从出发到体育馆,小华共用了______分钟;
小华在报亭看报用了多少分钟?
小华看完报后到体育馆的平均速度是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1878c4a926059922121f6ae9b6d6a15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ee1a9b57653b5a3ee92f7d9550deb1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://img.xkw.com/dksih/QBM/2019/10/14/2311693275922432/2317313557864448/STEM/4cb1f09e624d410580ff9043b8bcb0f8.png?resizew=255)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4bb89a362c1faf4d0c306eabbb59710.png)
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【推荐2】如图,在矩形
中
,
,点
从A出发沿线段
向点
运动,到达点
时停止.作
,交折线
于点
,设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8711eddf26d11fc974dfb6da4b640918.png)
,
.
与
的函数表达式以及对应的
的取值范围;
(2)在直角坐标系中画出
的图象,并写出函数
的一条性质;
(3)若
,结合函数图象,直接写出
时
的取值范围.(结果保留1位小数,误差不超过
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9caf47639ff9218ef27068ee10c265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fcc497b16c43b39596b64d77c969771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8711eddf26d11fc974dfb6da4b640918.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bdd7f221d03e79880cd13db4011c9d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ca394cdfb2a39b6bc7fd2a555ea995d.png)
![](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)
(2)在直角坐标系中画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7617f4ea2194c9322aebb384eb7a11c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb60758fe459335cc73b776f104f2994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4646418552dc060ebda1232361a01295.png)
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【推荐1】为提升学生的文学素养,培养学生的阅读兴趣,某校计划购买A,B两类图书共本,其中购买A类图书的单价为
元/本,购买B类图书所需费用y(元)与购买数量x(本)之间存在如图所示的函数关系.
(1)求y与x之间的函数关系式;
(2)若该校购买A类图书
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ba602bfa3a3ffb4fb43dc0f704a7f7d.png)
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【推荐2】如图,已知点
,
是一次函数
图象与反比例函数
图象的交点,且一次函数与x轴交于C点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/acd835d7-6fe3-42dd-8878-23bc8b92f0df.png?resizew=151)
(1)求该反比例函数和一次函数的解析式;
(2)连接AO,求
的面积;
(3)在y轴上有一点P,使得
,求出点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e80a82a2dba4822bbfd813aadf31334a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8df5b4c50805710dfe9aa5d0f7114d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05621b18b7ffc991d9f30380e2e08fea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/acd835d7-6fe3-42dd-8878-23bc8b92f0df.png?resizew=151)
(1)求该反比例函数和一次函数的解析式;
(2)连接AO,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
(3)在y轴上有一点P,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/225d5dc5d7678e31b99c019ca491645a.png)
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解题方法
【推荐1】在平面直角坐标系xOy中,点M的坐标为(x1,y1),点N的坐标为(x2,y2),且x1≠x2,y1≠y2,以MN为边构造菱形,若该菱形的两条对角线分别平行于x轴,y轴,则称该菱形为边的“坐标菱形”,
(1)已知点A(2,0),B(0,2
),则以AB为边的“坐标菱形”的面积为 ;
(2)若点C(1,2),点D在直线y=5上,以CD为边的“坐标菱形”为正方形,求直线CD解析式.
(1)已知点A(2,0),B(0,2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(2)若点C(1,2),点D在直线y=5上,以CD为边的“坐标菱形”为正方形,求直线CD解析式.
![](https://img.xkw.com/dksih/QBM/2019/9/16/2291888243425280/2292237681745920/STEM/330532dc5f9b4e16b09710f124e4c491.png?resizew=228)
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【推荐2】在平面直角坐标系中,经过点
且与
平行的直线,交x轴于点B.
的面积;
(2)在图1中,过
的直线与
成
夹角,试求该直线与
交点的横坐标;
(3)如图2,现有点
在线段
上运动,点
在x轴上,N为线段
的中点.
①试求点N的纵坐标y关于横坐标x的函数关系式;
②直接写出N点的运动轨迹长度为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f94c4f6b762fddb0e313050ef6932eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38cd2a180ae300bbf2388a709e4c28e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
(2)在图1中,过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99296bab1b42898e7ca336a822510258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)如图2,现有点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5356182cc3bc478f7c2e3e6dee25e58d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ad6d5ea6d2b53c091f314d98f6a81e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
①试求点N的纵坐标y关于横坐标x的函数关系式;
②直接写出N点的运动轨迹长度为 .
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【推荐3】如图,在平面直角坐标系中,长方形OABC的边OC、OA分别在x轴、y轴上,B点在第一象限,点A的坐标是(0,4),OC=8.
(1)直接写出点B、C的坐标;
(2)点P从原点O出发,在边OC上以每秒1个单位长度的速度匀速向C点移动,同时点Q从点B出发,在边BA上以每秒2个单位长度的速度匀速向A点移动,当一个点到达终点时,另一个点随之停止移动,设移动的时间为t秒钟,探究下列问题:
① 当t值为多少时,直线PQ∥y轴?
② 在整个运动过程中,能否使得四边形BCPQ的面积是长方形OABC的面积的
?若能,请直接 写出P、Q两点的坐标;若不能,说明理由.
(1)直接写出点B、C的坐标;
(2)点P从原点O出发,在边OC上以每秒1个单位长度的速度匀速向C点移动,同时点Q从点B出发,在边BA上以每秒2个单位长度的速度匀速向A点移动,当一个点到达终点时,另一个点随之停止移动,设移动的时间为t秒钟,探究下列问题:
① 当t值为多少时,直线PQ∥y轴?
② 在整个运动过程中,能否使得四边形BCPQ的面积是长方形OABC的面积的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6503ca085e3ca5f2ba723b0dd66e210b.png)
![](https://img.xkw.com/dksih/QBM/2018/7/2/1979694318723072/1981060721254400/STEM/669c1fce3c714f64bd7ea8022ef8ab1e.png?resizew=195)
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【推荐1】如图,四边形
中,
,
,
,
,点
从点
出发,以每秒2个单位长度的速度向点
运动,同时,点
从点
出发,以每秒1个单位长度的速度向点
运动,其中一个动点到达终点时,另一个动点也随之停止运动.过点
作
于点
,连接
交
于点
,连接
.设运动时间为
秒.
_____,
______.(用含
的代数式表示)
(2)当四边形
为平行四边形时,求
的值.
(3)如图,当
和
在运动的过程中,是否存在某时刻
,使
为等腰三角形,若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4795ee1f96b430529934e2231b38885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/317b5c66753b9cd6958124291fc71eb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe6fc244aa2358b18fa28b59ea65f70.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/5845ffc7d1af9053b027cf9e726f5367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dca049735b45fb9b2533c68605eddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1039601edd7326b628a3201a3d4af948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/524f25e1eedbfe399f7f42db890ab89a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)当四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c10c10f627059102596e2ba0f0235b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)如图,当
![](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/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80110e884d8a8ad798087ab3d2a54a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐2】已知:如图所示,四边形ABCD是矩形,对角线AC,BD相交于点O,CE//DB,交AB的延长线于点E,AC与CE相等吗?请说明理由.
![](https://img.xkw.com/dksih/QBM/2011/12/17/1573309345857536/1573309371457536/STEM/07ca9bc677b148b0a88b47fcba8acf81.png)
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【推荐3】【教材呈现】下面是华师版教材九年级上册52页的部分内容:
【问题原型】如图①,在矩形
中,点E为边
的中点,
,点P、Q分别在矩形的边
上,连结
交
于点M.
求证:
.
【结论应用】如图②,在【问题原型】的基础上,点R在边
上(不与点Q重合)
(1)若
,则线段
的长为 ;
(2)当点Q与点B重合,点R与点C重合时,如图③,
,
,连结
,则
周长最小值为 .
我们可以发现,当两条直线与一组平行线相交时,所截得的线段存在一定的比例关系:![]() 两条直线被一组平行线所截,所得的对应线段成比例.(简称“平行线分线段成比例”) ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d354155f71a1736c1c9186168695edd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba48366317ebea1c9dd5e4e67e03092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d2e96076439a3c38c528a165b4257dd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/7/af949dcb-e881-423d-9d9c-ea94d3a93ce5.jpg?resizew=503)
【结论应用】如图②,在【问题原型】的基础上,点R在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ee7af832af9460f4775fa5c8c3620f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d7b816eca15d4b7d060013df53edd53.png)
(2)当点Q与点B重合,点R与点C重合时,如图③,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cabe370631c5ee14faee5bdc40700708.png)
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