如图,矩形OABC中,OC=4,OA=3,分别以OC、OA所在的直线为x轴、y轴,建立如图所示的坐标系,反比例函数y=
(x>0)的图象经过点B.
(1)求反比例函数的解析式;
(2)一次函数y=ax﹣1的图象与y轴交于点D,与反比例函数y=
(x>0)的图象交于点E,且△ADE的面积为6,求一次函数的解析式;
(3)将线段OE沿x轴以每秒1个单位长度的速度向右平移,设运动时间为t,平移后的线段与反比例函数y=
(x>0)的图象交于点F,与x轴交于点G,t为何值时,GF=
OE?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b975a35f4921a7768a39523c647e8ce0.png)
(1)求反比例函数的解析式;
(2)一次函数y=ax﹣1的图象与y轴交于点D,与反比例函数y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b975a35f4921a7768a39523c647e8ce0.png)
(3)将线段OE沿x轴以每秒1个单位长度的速度向右平移,设运动时间为t,平移后的线段与反比例函数y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b975a35f4921a7768a39523c647e8ce0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/2019/6/21/2230237016121344/2230524843122688/STEM/3a4c439a52e34c4395070e45fd28fc26.png?resizew=165)
更新时间:2019-06-21 19:17:19
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【推荐1】如图在平面直角坐标系中,一次函数
与反比例函数
在第一象限交于点P(1,p),点M的横坐标为m(0<m<1)是反比例函数图像上的一点,MN∥x轴交一次函数于点N.
(1)求出k的值;
(2)是否存在点M,使△MNP是以MN为底的等腰三角形,若存在求出m,若不存在说明理由;
(3)以MN为边长,在MN的下方作正方形MNAB,判断边NA与反比例函数图像是否有交点,若有求出交点坐标,若没有并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b9f0b9e53a83e68f5fec944f343119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b0b612460326448de36e160c8d29af9.png)
(1)求出k的值;
(2)是否存在点M,使△MNP是以MN为底的等腰三角形,若存在求出m,若不存在说明理由;
(3)以MN为边长,在MN的下方作正方形MNAB,判断边NA与反比例函数图像是否有交点,若有求出交点坐标,若没有并说明理由.
![](https://img.xkw.com/dksih/QBM/2020/7/15/2506417291919360/2507036724412416/STEM/6d08e8527365449592c615fce160459a.png?resizew=179)
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【推荐2】如图1,已知点A(﹣1,0),点B(0,﹣2),AD与y轴交于点E,且E为AD的中点,双曲线y=
经过C,D两点且D(a,4)、C(2,b).
(1)求a、b、k的值;
(2)线段CD能通过旋转一定角度后点C、D的对应点C′、D′还能落在y=
的图象上吗?如果能,写出你是如何旋转的,如果不能,请说明理由;
(3)如图3,点P在双曲线y=
上,点Q在y轴上,若以A、B、P、Q为顶点的四边形为平行四边形,试求满足要求的所有点P、Q的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abb3a62e46296c417261156b51ec6b4.png)
(1)求a、b、k的值;
(2)线段CD能通过旋转一定角度后点C、D的对应点C′、D′还能落在y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abb3a62e46296c417261156b51ec6b4.png)
(3)如图3,点P在双曲线y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abb3a62e46296c417261156b51ec6b4.png)
![](https://img.xkw.com/dksih/QBM/2017/8/14/1752134122438656/1752716164841472/STEM/9a2f85797b9249be838f16afd887bdb7.png?resizew=488)
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【推荐3】数学课上,张老师出示了问题1:如图1,四边形ABCD是正方形,BC=1,对角线交点记作O,点E是边BC延长线上一点.连接OE交CD边于F,设CE=x,CF=y,求y关于x的函数解析式及其定义域.
(1)经过思考,小明认为可以通过添加辅助线﹣﹣过点O作OM⊥BC,垂足为M求解.你认为这个想法可行吗?请写出问题1的答案及相应的推导过程;
(2)如果将问题1中的条件“四边形ABCD是正方形,BC=1”改为“四边形ABCD是平行四边形,BC=3,CD=2,”其余条件不变(如图2),请直接写出条件改变后的函数解析式;
(3)如果将问题1中的条件“四边形ABCD是正方形,BC=1”进一步改为:“四边形ABCD是梯形,AD∥BC,BC=a,CD=b,AD=c(其中a,b,c为常量)”其余条件不变(如图3),请你写出条件再次改变后y关于x的函数解析式以及相应的推导过程.
![](https://img.xkw.com/dksih/QBM/2017/8/1/1742717175250944/1744117883076608/STEM/3360d048613341f193bfec8ac2fab169.png?resizew=132)
(1)经过思考,小明认为可以通过添加辅助线﹣﹣过点O作OM⊥BC,垂足为M求解.你认为这个想法可行吗?请写出问题1的答案及相应的推导过程;
(2)如果将问题1中的条件“四边形ABCD是正方形,BC=1”改为“四边形ABCD是平行四边形,BC=3,CD=2,”其余条件不变(如图2),请直接写出条件改变后的函数解析式;
(3)如果将问题1中的条件“四边形ABCD是正方形,BC=1”进一步改为:“四边形ABCD是梯形,AD∥BC,BC=a,CD=b,AD=c(其中a,b,c为常量)”其余条件不变(如图3),请你写出条件再次改变后y关于x的函数解析式以及相应的推导过程.
![](https://img.xkw.com/dksih/QBM/2017/8/1/1742717175250944/1744117883076608/STEM/3360d048613341f193bfec8ac2fab169.png?resizew=132)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1742717175250944/1744117883076608/STEM/d3a29ecc24dc45009eb060009737f203.png?resizew=168)
![](https://img.xkw.com/dksih/QBM/2017/8/1/1742717175250944/1744117883076608/STEM/4e6ed926bd1f492a880211dec7eb35f6.png?resizew=170)
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【推荐1】如图,在正方形
中,
、
是
和
上的动点,连接
,
,交
于
,
两点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/d08c037f-a66e-4139-9fc4-d0a07e81d6f8.png?resizew=280)
(1)当
时,①求
的度数;
②求以
为边的正方形面积.
(2)当
、
在
,
上运动时,始终保持
,连接
,则
面积的最小值为____.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.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/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.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/9a9fa8832f98b5418a7d75892f7951b8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/d08c037f-a66e-4139-9fc4-d0a07e81d6f8.png?resizew=280)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fb1f6c9e8b610d029a20ebab0b2dd58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08699ec7bcd102d6fb7531527cac082a.png)
②求以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15bdee7807edba89958c84bf4bb85f15.png)
(2)当
![](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/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70eb88a80bf37601f08ed4bdba4a834c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de3a8deac36e5cdc2d67a0142b5326fb.png)
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解题方法
【推荐2】定义:有三条边相等的四边形称为三等边四边形.
![](https://img.xkw.com/dksih/QBM/2020/6/25/2492429074128896/2493890778546176/STEM/36547516-8b43-492f-b6dc-fd04647e2877.png)
![](https://img.xkw.com/dksih/QBM/2020/6/25/2492429074128896/2493890778546176/STEM/2a9f4946-dbbe-4854-bcaa-6d4adab01bd4.png)
(1)如图①,平行四边形
中,对角线
平分
,将线段
绕点
旋转一个角度
至
,连接
.
①求证:四边形
是三等边四边形;
②如图②,连接
,
.求证:
;
(2)如图,在(1)的条件下,设
与
交于点
,
,
,
,求以
,
和
为边的三角形的面积.
![](https://img.xkw.com/dksih/QBM/2020/6/25/2492429074128896/2493890778546176/STEM/c3f944fd-d549-427c-9f51-689eef3a700e.png)
![](https://img.xkw.com/dksih/QBM/2020/6/25/2492429074128896/2493890778546176/STEM/36547516-8b43-492f-b6dc-fd04647e2877.png)
![](https://img.xkw.com/dksih/QBM/2020/6/25/2492429074128896/2493890778546176/STEM/2a9f4946-dbbe-4854-bcaa-6d4adab01bd4.png)
(1)如图①,平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727ad3e630a224303d6d3b8ad5c114ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3324f7ee254aa9b6d0356d3ca03126ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
①求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
②如图②,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de6e42654df96082a04ceaea6d455af.png)
(2)如图,在(1)的条件下,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/403b09fff1db463ce3793a4a1b6508e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9938f4e86299b789840a58159eb9527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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