某班数学兴趣小组对函数
的图象和性质进行了探究,探究过程如下,请补充完整:
(1)自变量x的取值范围取足全体实数,x与y的几组对应值列表如下:其中
.
(2)根据上表数据,在如图所示的平面直角坐标系中描点,现在画出了函数图象的一部分,请画出该函数图象的另一部分.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/6b1e3202-3bc4-42c1-8c26-8eddd146b8c6.png?resizew=174)
(3)观察函数图象,写出函数的一条性质 ;
(4)进一步探究函数图象解决问题:
①方程
有 个实数根;
②在(2)问的平面直角坐标系中画出直线
,根据图象写出方程
的一个正数根约为 .(精确到0.1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdedd5994959d0bb7c0b17994335728e.png)
(1)自变量x的取值范围取足全体实数,x与y的几组对应值列表如下:其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
x | …… | ![]() | ![]() | 0 | 0.5 | 1 | 1.5 | 2 | 2.5 | 3 | …… |
y | …… | 3 | m | 0 | 0.75 | 1 | 0.75 | 0 | 1.25 | 3 | …… |
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/6b1e3202-3bc4-42c1-8c26-8eddd146b8c6.png?resizew=174)
(3)观察函数图象,写出函数的一条性质 ;
(4)进一步探究函数图象解决问题:
①方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f9bcb9ddee1a3da14f3ba4faba4915b.png)
②在(2)问的平面直角坐标系中画出直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec89d17a1b8f7961e2f1f27c2d50685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb81d73470a3df257d20908f321a357e.png)
更新时间:2019-09-13 22:33:41
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相似题推荐
解答题-作图题
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名校
【推荐1】小明根据学习函数的经验,对函数
的图像与性质进行了探究并解决了相关问题,请补全下面的过程.
(1)函数
的自变量x的取值范围是_________________;
(2)下表是y与x的几组对应值:
写出表中m的值;
(3)如图,在平面直角坐标系xOy中,描出以补全后的表中各对对应值为坐标的点,画出该函数的图像;
①对于图像上两点
,
,若
,则
_______
(填“>”,“=”或“<”);
②当
时,若对于x的每一个值,函数
的值小于正比例函数
的值,则k的取值范围是_______________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c1eff41dc8a7fe49090ba532ae6b24e.png)
(1)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c1eff41dc8a7fe49090ba532ae6b24e.png)
(2)下表是y与x的几组对应值:
x | … | 0 | 1 | 2 | 3 | … | |||
y | … | 1 | m | 3 | … |
(3)如图,在平面直角坐标系xOy中,描出以补全后的表中各对对应值为坐标的点,画出该函数的图像;
①对于图像上两点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60574e468acf787924508b61d63db3c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d45aab79ca04f343da6778cad10c2605.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d41acc47493556617fe7b9e55093d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c1eff41dc8a7fe49090ba532ae6b24e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa841ce5d58b64f747a3c1b69bb20a5b.png)
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【推荐2】小嘉同学想要挑战“自制弹簧测力计”项目,为此他需要了解弹簧在弹性限度内的弹簧长度与拉力的关系,再根据实验数据制作弹簧测力计.经过测量,他得到了5组拉力读数
与弹簧长度
(
)之间的数据,如下表所示:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/5c6670fa-398b-4203-8bca-8d00740446e6.png?resizew=244)
(1)请在右图的直角坐标系中描出各点
,能否用你学过的函数模型来刻画这两个变量之间的关系?若能,试求出
关于
的函数表达式;
(2)当弹簧长度为
时,物体拉力是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6461b6f8a959e6976889525193303c2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a8e2712494bc2022c30d37e395cf10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39a22c87fc8aa9762289cccf5f70fe0.png)
![]() | 1 | 2 | 3 | 4 | 5 |
![]() | 3.6 | 5.2 | 6.8 | 8.4 | 10 |
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/5c6670fa-398b-4203-8bca-8d00740446e6.png?resizew=244)
(1)请在右图的直角坐标系中描出各点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a79a33a83a7ba57a34b5093d1d1d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)当弹簧长度为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/329e49d15ceb02f4ae29913b59366355.png)
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【推荐3】在初中函数学习中,我们经历了列表、描点、连线画函数图象,结合图象研究函数性质并对其性质进行应用的过程.小丽同学学习二次函数后,对函数
(自变量x可以是任意实数)图象与性质进行了探究.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/383a81a8-2c49-4c16-b36f-854629840a9a.jpg?resizew=307)
(1)绘制函数图象;
①列表:如表是x与y的几组对应值,其中
,
;
②描点:根据表中的数值描点
,并描出了一部分点,请补充描出点
,
;
③连线:用平滑的曲线顺次连接各点,画出函数图象;
(2)根据所作图象,回答下列问题:
①方程
的解是 ;
②如果
的图象与直线
有4个交点,则k的取值范围是 ;
(3)延伸思考:
将函数
的图象经过怎样的平移可得到
的图象?请写出平移过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ba7fca5e3c2e2dca368df4d6569d1e0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/383a81a8-2c49-4c16-b36f-854629840a9a.jpg?resizew=307)
(1)绘制函数图象;
①列表:如表是x与y的几组对应值,其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
x | … | ﹣4 | ﹣3 | ﹣2 | ﹣1 | 0 | 1 | 2 | 3 | 4 | … |
y | … | 8 | m | 0 | ﹣1 | 0 | ﹣1 | 0 | 3 | n | … |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d9aa1d34d66a6876aa0566c8fc8b0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9aabd1c1e0b106eacc61f2bd9b05081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17cde8502f02e3aadfbb8ca207ba5240.png)
③连线:用平滑的曲线顺次连接各点,画出函数图象;
(2)根据所作图象,回答下列问题:
①方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75fc4d2aa1c5a46c878512fa49431e67.png)
②如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ba7fca5e3c2e2dca368df4d6569d1e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ead6a3dbd03539ef5e0807be57bb1e17.png)
(3)延伸思考:
将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ba7fca5e3c2e2dca368df4d6569d1e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4024f6a14cd9ce58da0caddc72e86ea5.png)
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【推荐1】如图,“爱心”图案是由抛物线
的一部分及其关于直线
的对称图形组成,点
,
是“爱心”图案与其对称轴的两个交点,点
,
,
,
是“爱心”图案与坐标轴的交点,且点
,
的坐标分别为
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/13/c11413fd-71ba-4849-bcf1-5952da2c185c.png?resizew=163)
(1)求
,
的值;
(2)求抛物线
关于直线
对称后的图象的表达式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec1386af8154e5ffc3ad67120667bf9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1d8d5cea065075fe50706abe3ae802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/8455657dde27aabe6adb7b188e031c11.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c47f2aafa29bbfc3229a3a12f71596e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2778fec7f86737da8ae7e0c06278fba9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/13/c11413fd-71ba-4849-bcf1-5952da2c185c.png?resizew=163)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6acd9297db21d269fa1cfb0d76a31ceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1d8d5cea065075fe50706abe3ae802.png)
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【推荐2】如图,抛物线
的顶点为
,与
轴的交点为
和
(其中点
与原点重合),将抛物线
绕点
逆时针方向旋转
,点
,
为点
,
旋转后的对应点.
的解析式;
(2)求证:点
,
,
在同一条直线上;
(3)若点
是原抛物线上的一动点,点
是旋转后的图形的对称轴上一点,
为线段
的中点,在第一象限内存在一点
,使得以
,
,
,
为顶点的四边形是平行四边形,请直接写出点
坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59990760ceda76dc4019dac32ed3a25a.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/381d87099ea292649c074544cf06dcdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b104090ea2ac34be58a76a4e0e95cb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
(2)求证:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
(3)若点
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐1】阅读与理解
定义新运算:若
,则
;
若
,则
;
(1)已知
,求
;
(2)已知
,令
,求y,并思考
的函数图象与一次函数
的图象是否相交,请说明理由.
定义新运算:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a426f82e51d629d0e6ec42ae292b068f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b903e9e7304d0c3f145fb43f4880bcd.png)
若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b4de0a1c68ad3579ae8e19b82b25e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bf815d3da026c756738808c84c4d6dd.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de49d0789bde2077eb9c93f669b2b9c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f643616cd3d2459c506c8647641f081f.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a7b06ac3e15a43ca2cf71f89d357dcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/999254c13d9304af5754dfdd9a088e6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/999254c13d9304af5754dfdd9a088e6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab466aedd6e176088d8dee7bc3e3aaa.png)
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【推荐2】我们在求方程
的近似根时,可以将原方程变形为
,然后在同一直角坐标系中画出函数
和
的图象,发现
,
.请你利用已有的函数图象判断方程
在实数范围内有几个解?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/551670b13a708efc67afbe5c4899b7d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63da1bb7b1bbb077014432a2ded8ce96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/129f538d3486f59dbb310c0d9c67c114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f1524b3f629e0176586efb4ea437d3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8048cbab4b5913a0d40780c93be8652.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaa02e12e7a37a6a0ae12ee6f20f2cc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8080a47f2c83d7b6be62e60d8536fc95.png)
![](https://img.xkw.com/dksih/QBM/2018/9/12/2030715410825216/2032769804599296/STEM/1d5d86afbee94d00b3b5715f3d4b6c39.png?resizew=157)
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【推荐1】已知抛物线
与x轴交于A、B两点,其中点B在点A的右侧,与y轴交于点C.
(1)求点A、B的坐标.
(2)若
,
,抛物线与线段
只有一个公共点,结合函数图象,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dbf6287ed3b05b43ddd5ce6c36959cf.png)
(1)求点A、B的坐标.
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15ed90ebf0061c8a79beed307fc1719a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca1bf8899b8865afe102aec97e340e45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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名校
【推荐2】在平面直角坐标系
中,有一函数
过点
.
(1)若
,
是一元二次方程
的两个实数根,求
的可能取值.
(2)过
作直线
,讨论直线
与函数的交点个数(此时
为确定的实数).
(3)过原点作一条直线
交该函数于另一点
,再过
作垂直于
的直线
交抛物线另一点于
,请试探究
面积的取值范围(此时
为确定的实数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2beb91f10d2d8f2aa0dcc3f5cd1598.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf210c8c9e83e70f2d3ede1e18a5f3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d768f47a34f941657e86df1d42e9f9be.png)
(1)若
![](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/e9939dc0caf74052757f2eec44bb0662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b2c90d5b7c4c08d23f39a864d600043.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)过原点作一条直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a3e520a16d4fdd73c4e6a4ce7be0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-作图题
|
适中
(0.65)
【推荐3】如图,在平面直角坐标系中,点A的坐标是(0,2),在x轴上任取一点M,完成以下作图步骤:①连接AM,作AM的垂直平分线l1,过点M作x轴的垂线l2,记l1,l2的交点为P;②在
轴上多次改变M点的位置,用①的方法得到相应的点P.
![](https://img.xkw.com/dksih/QBM/2022/1/19/2897725544472576/2915514945380352/STEM/436905ea-61c4-4f12-a7c6-449168771f3e.png?resizew=365)
(1)小明按要求已完成了①的作图,并确定了M1,M2,M3的位置,请你帮他完成余下的作图步骤,描出对应的P1,P2,P3…并把这些点用平滑的曲线连接起来,观察画出的曲线L,猜想它是我们学过的哪一种曲线;
(2)对于曲线L上的任意一点P,线段PA与PM有什么关系?设点P的坐标是(x,y),试求出x,y满足的函数关系式;(提示:根据勾股定理用含x,y的式子表示线段PA的长.)
(3)若直线y=kx+b经过定点A,且与x轴的夹角为45°,直接写出该直线与(2)中的曲线L的交点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/2022/1/19/2897725544472576/2915514945380352/STEM/436905ea-61c4-4f12-a7c6-449168771f3e.png?resizew=365)
(1)小明按要求已完成了①的作图,并确定了M1,M2,M3的位置,请你帮他完成余下的作图步骤,描出对应的P1,P2,P3…并把这些点用平滑的曲线连接起来,观察画出的曲线L,猜想它是我们学过的哪一种曲线;
(2)对于曲线L上的任意一点P,线段PA与PM有什么关系?设点P的坐标是(x,y),试求出x,y满足的函数关系式;(提示:根据勾股定理用含x,y的式子表示线段PA的长.)
(3)若直线y=kx+b经过定点A,且与x轴的夹角为45°,直接写出该直线与(2)中的曲线L的交点坐标.
您最近一年使用:0次