对于平面直角坐标系
中的点
,若点
的坐标为
(其中k为常数,且
),则称点
为点P的“k系好友点”;例如:
的“3系好友点”为
,即
.
请完成下列各题.
(1)点
的“2系好友点”
的坐标为______________;
(2)若点P在y轴的正半轴上,点P的“k系好友点”为点
,若在
中,
,求k的值;
(3)已知点
在第四象限,且满足
;点A是点
的“
系好友点”,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827539d066d1b78e7ef8bc1569864971.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc81761862288a59cdf7a7702c71fa81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c80c26a794a844127aae7dee87c93b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03193aaea57bc6f935f2c299ecc2a238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f5ceeba6da02d758327614dfff1cce0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc9767bf2f39b2faf55d4893e011ff8c.png)
请完成下列各题.
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/879080beb1e55cae2639645cd64c4710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
(2)若点P在y轴的正半轴上,点P的“k系好友点”为点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef60068827063709b73b3088505bc333.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c88fd65b99ddebba691bd2a67ca9dbf9.png)
(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17375498fcd71a15ba331cdbab76fc10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cdade62525d5b0dd75994a12e3ce04f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72babdedbe6b32b150cc3ee258a7c310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c698a2619d94c3400df57c49fab40d39.png)
更新时间:2022-08-09 19:45:19
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相似题推荐
解答题-问答题
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名校
【推荐1】如图1,是一个长为
,宽为
的长方形,沿图中虚线用剪刀将其均分成四个小长方形,然后按图
的形状拼成一个正方形.
![](https://img.xkw.com/dksih/QBM/2023/4/6/3210754858041344/3214079806439424/STEM/11793f7b49f048eda17bb454de4dc015.png?resizew=190)
(1)图
中正方形阴影部分的面积为 ;
(2)请你用两种不同的方法分别求图
中阴影部分的面积,可以得到等式是 ;
(3)若
,
,则
= ;
(4)若
,
,求
的值 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2f7eeb06cd905c9d8a13c1c67890417.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212b97a1d6785f21e8559809efc0ea47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://img.xkw.com/dksih/QBM/2023/4/6/3210754858041344/3214079806439424/STEM/11793f7b49f048eda17bb454de4dc015.png?resizew=190)
(1)图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
(2)请你用两种不同的方法分别求图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60aee7601a9a1eb59eff23d98745fa12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddc2193a37b7d1b2afb6ff24b86446bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31da7291140e430a11e2a10cc6cdefbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cbc8207d75822c19a9aad4aa0c18814.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c96478b6555d9fa4435f6271dfd2bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e63be0ccc46c2327bf88264a8ff132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2797d3cbf5718e2cab76af3b53679f86.png)
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【推荐2】下面是小敏写的数学日记的一部分,请你认真阅读,并完成相应的任务.
2023年9月22日天气:晴
回顾梳理:要在数轴上找到表示
的点,关键是在数轴上构造线段
.如图1,正方形的边长为1个单位长度,以原点O为圆心,对角线长为半径画弧与数轴上分别交于点A,
,则点A对应的数为
,点
对应的数为
.
类似地,我们可以在数轴上找到表示
,
,…的点.
拓展思考:如图2,改变图1中正方形的位置,用类似的方法作图,可在数轴上构造出线段
与
,其中O仍在原点,点B,
分别在原点的右侧、左侧,可由线段
与
的长得到点B,
所表示的无理数!按照这样的思路,只要构造出特定长度的线段,就能在数轴上找到无理数对应的点!
(1)在图3中画图确定表示
的点M.
的正方形纸片,沿着边的方向裁出一块面积为
的长方形纸片如图5,使它的长是宽的2倍.小丽能用这块纸片裁出符合要求的纸片吗?请你通过计算说明理由.
以及
的点,并比较它们的大小.
2023年9月22日天气:晴
无理数与线段长.
今天我们借助勾股定理,在数轴上找到了一些特殊的无理数对应的点,认识了“数轴上的点与实数一一对应”这一事实.回顾梳理:要在数轴上找到表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfb08ef5d3932d79ad6ab76aa43bef45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57327e4a89dcdbb147b123cdc13a9874.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9db9373e74ecf5d63ad98afe66aa4ba.png)
类似地,我们可以在数轴上找到表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe51e84c844777379cb7f53aeaf2241b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64334e735315bf3550709c10e9b82810.png)
拓展思考:如图2,改变图1中正方形的位置,用类似的方法作图,可在数轴上构造出线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17cf8e6bfbe3b365f8e9278cc469d2b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17cf8e6bfbe3b365f8e9278cc469d2b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
(1)在图3中画图确定表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4056761b8f826eeb6ad8c9a151d3c9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4c3db5a2c7ec78d824c6da7eb1c7ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce019005b5243d67ed1a996d4e752a31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/529709040fa0a98ce729428f6cec8db8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/261abbf04cca9f260444c9126026a857.png)
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【推荐2】如图,直线
与
轴、
轴分别相交于点
,点
的坐标为
,点
的坐标为
.点
是第二象限内的直线上的一个动点.
(1)求
的值
(2)当点
运动过程中,试写出
的面积
与
的函数关系式,并写出自变量
的取值范围;
(3)求当
运动到什么位置(求
的坐标)时,四边形
的面积为
,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/170785d8eaffa7cb618e52c4580e95fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0afd928d67fc317e889f8623172bc8f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d5b2fee25cf53520f57c017e90e41f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8701e0cce437edc830438b4fe6277d89.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3991001f80af2716b605efe2d7641d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)求当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13c8db855d047f4799b09ec9588b5774.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d416900871bd9c1fb1ab34fafdaa4a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/14/0efdca70-2668-43fb-a304-99e911978990.png?resizew=247)
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解题方法
【推荐1】如图,直线
和x轴、y轴的交点分别为B、C,点A的坐标是
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/3b010c6d-368d-4b6e-b55f-8fc6f86d058d.png?resizew=184)
(1)试说明
是等腰三角形;
(2)动点M从A出发沿x轴向点B运动,同时动点N从点B出发沿线段BC向点C运动,运动的速度均为每秒1个单位长度.当其中一个动点到达终点时,他们都停止运动.设M运动t秒时,
的面积为S.
①求S与t的函数关系式;
②设点M在线段OB上运动时,是否存在
的情形?若存在,求出对应的t值;若不存在请说明理由;
③在运动过程中,当
为直角三角形时,求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a98e24892abc0eb34d5216d4e89c61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e09872be2fce54e922259bde2c540bdc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/3b010c6d-368d-4b6e-b55f-8fc6f86d058d.png?resizew=184)
(1)试说明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)动点M从A出发沿x轴向点B运动,同时动点N从点B出发沿线段BC向点C运动,运动的速度均为每秒1个单位长度.当其中一个动点到达终点时,他们都停止运动.设M运动t秒时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f02028a3847c4807c2d3cf0ea7efb8.png)
①求S与t的函数关系式;
②设点M在线段OB上运动时,是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c343fddb5d98905bb22b9b08b15f3d0.png)
③在运动过程中,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f02028a3847c4807c2d3cf0ea7efb8.png)
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【推荐2】在△ABC中,∠ACB=90°,AC=BC,,点A、C分别是x轴和y轴上的一动点.
(1)如图1.若点B的横坐标为﹣4,求点C的坐标;
(2)如图2,BC交x轴于点D,若点B的纵坐标为3,A(5,0),求点C的坐标;
(3)如图3,当A(5,0),C(0,﹣2)时,以AC为直角边作等腰直角△ACE,(﹣2,0)为F点坐标,连接EF交y轴于点M,当点E在第一象限时,求S△CEM:S△ACO的值.
(1)如图1.若点B的横坐标为﹣4,求点C的坐标;
(2)如图2,BC交x轴于点D,若点B的纵坐标为3,A(5,0),求点C的坐标;
(3)如图3,当A(5,0),C(0,﹣2)时,以AC为直角边作等腰直角△ACE,(﹣2,0)为F点坐标,连接EF交y轴于点M,当点E在第一象限时,求S△CEM:S△ACO的值.
![](https://img.xkw.com/dksih/QBM/2021/10/27/2838138499653632/2839220941512704/STEM/ab496f5f-1511-4e50-aaa1-9c8f63d79b22.png)
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【推荐3】如图1,已知直线
:
,点
在直线
上.
是过定点
的一簇直线.嘉淇用绘图软件观察
与
的关系.记
过点
时的直线为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/9/c5f55009-1761-419f-a617-dc2bcb0e4ef5.png?resizew=359)
(1)求
的值及
的解析式;
(2)探究
与
的数量关系;当
与
轴的交点为
时,记此时的直线为
,
与
的交点记为A,求
的长;
(3)当
与直线
的交点为整点(横、纵坐标均为整数),且
的值也为整数时,称
为“美好直线”.
①在如图
所示的视窗下(
,
),求
为“美好直线”时
的值;
②视窗的大小不变,改变其可视范围,且变化前后原点
始终在视窗中心.现将图
中坐标系的单位长度变为原来的
,使得在视窗内能看到所有“美好直线”与直线
的交点,求
的最小整数值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c608def11fa0e2b34f05592ef1d11fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c09615735d331befd07664aa47cb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89c1972246a0a3d1c987d25205dbdd99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e9b5e076078240e0c5ad9763a9824d3.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/89c1972246a0a3d1c987d25205dbdd99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/9/c5f55009-1761-419f-a617-dc2bcb0e4ef5.png?resizew=359)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
(2)探究
![](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/89c1972246a0a3d1c987d25205dbdd99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9fce9427c9b17e4d3cda0c3ff3e2e14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9fce9427c9b17e4d3cda0c3ff3e2e14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89c1972246a0a3d1c987d25205dbdd99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89c1972246a0a3d1c987d25205dbdd99.png)
①在如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a87fedc312d391522735b7960353b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab887734e4ec2d8df140b3a46e7288f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89c1972246a0a3d1c987d25205dbdd99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
②视窗的大小不变,改变其可视范围,且变化前后原点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/633d22853c65a3b97f7eb74afa8da9b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c608def11fa0e2b34f05592ef1d11fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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