如图,在
中,
,
,
,
.若动点
以每秒2个单位长度的速度从点
出发,沿着
匀速运动到点
时停止运动,设点
运动的时间为
秒,
的面积为
.
关于
的函数关系式,并注明
的取值范围;
(2)若函数
,请在给定的平面直角坐标系中画出
和
的函数图象,并写出函数
的一条性质;
(3)结合函数图象,请直接估计
时,
的取值范围.(保留一位小数,误差不超过0.2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.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/f7a6be08c747b22834f1425c6253eebc.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96645a3530e72d5d733d2c72147d340.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a909b65fadd951b7c560641591a2cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
(3)结合函数图象,请直接估计
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f99df1a7b58018125b99578b779342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
更新时间:2024-04-12 01:06:59
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相似题推荐
解答题-问答题
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【推荐1】初三年级某班成立了数学学习兴趣小组,该小组对函数
的图像和性质进行探究,过程如下,请你补充完整.
(1)①列表:下表是x,y的几组对应值,其中m=______,n=______;
②描点:根据表中的数值描点(x,y),请补充描出点(
,m),(
,n);
③连线:用平滑的曲线顺次连接各点,请把图像补充完整.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/29/1b30877a-ff06-4f65-89bd-cf18936803c5.png?resizew=224)
(2)请你观察图像,直接写出当x在什么范围内时,y随x的增大而增大?______;
(3)除了上述增减性,请你再写出两条该函数的图像特征或性质:①______;②______;
(4)点(m,a)与(n,b)在函数图像上,且
,则a与b的大小关系是______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e060790dc6dba0c9a89c98fce916e6ea.png)
(1)①列表:下表是x,y的几组对应值,其中m=______,n=______;
x | … | ![]() | 0 | 1 | 2 | … | |||||
y | … | 3 | 0 | m | 0 | n | 0 | 3 | … |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59f50b7d593b313fdb0d251235d53ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cfa1e7ffae662aefb49a44c52d4954d.png)
③连线:用平滑的曲线顺次连接各点,请把图像补充完整.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/29/1b30877a-ff06-4f65-89bd-cf18936803c5.png?resizew=224)
(2)请你观察图像,直接写出当x在什么范围内时,y随x的增大而增大?______;
(3)除了上述增减性,请你再写出两条该函数的图像特征或性质:①______;②______;
(4)点(m,a)与(n,b)在函数图像上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/064faa38c70f38883de71c9a01cc8990.png)
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名校
【推荐2】阅读理解:如图,Rt△AB中,
,AC=BC,AB= 4cm.动点D沿着A→C→B的方向从A点运动到B点.DE
AB,垂足为E.设AE长为
cm,BD长为
cm(当D与A重 合时,
= 4;当D与B重合时
=0).小云根据学习函数的经验,对函数
随自变量
的变化而变化的规律进行了探究.下面是小云的探究过程,请补充完整:
![](https://img.xkw.com/dksih/QBM/2020/3/18/2422029450625024/2422738414796800/STEM/f96bd05ef30b430e82301a2d1dc392f8.png?resizew=177)
(1)通过取点、画图、测量,得到了
与
的几组值,如下表:
补全上面表格,要求结果保留一位小数.则
__________;
(2)在下面的网格中建立平面直角坐标系,描出以补全后的表中各对对应值为坐标的点,画出该函数的图象;
![](https://img.xkw.com/dksih/QBM/2020/3/18/2422029450625024/2422738414796800/STEM/0eef7ec702b04385a34a04d950339a0d.png?resizew=183)
(3)结合画出的函数图象,解决问题:当DB=AE时,AE的长度约为 cm.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/2020/3/18/2422029450625024/2422738414796800/STEM/f96bd05ef30b430e82301a2d1dc392f8.png?resizew=177)
(1)通过取点、画图、测量,得到了
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![]() | 0 | 0.5 | 1 | 1.5 | 2 | 2.5 | 3 | 3.5 | 4 |
![]() | 4 | 3.5 | 3.2 | ![]() | 2.8 | 2.1 | 1.4 | 0.7 | 0 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae278be44b0bc72d1da5563b8ffc7c2.png)
(2)在下面的网格中建立平面直角坐标系,描出以补全后的表中各对对应值为坐标的点,画出该函数的图象;
![](https://img.xkw.com/dksih/QBM/2020/3/18/2422029450625024/2422738414796800/STEM/0eef7ec702b04385a34a04d950339a0d.png?resizew=183)
(3)结合画出的函数图象,解决问题:当DB=AE时,AE的长度约为 cm.
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【推荐1】定义:已知点
中的
,
为常数且
,无论实数
取何值,点
都在直线
上,我们就称直线l为点P的“恒定线”.例如:点
,无论实数a取何值,点
都在直线
上,即当
时,
,则直线
是点
的“恒定线”.
(1)已知直线
,它是 的“恒定线”.(填序号)
①点
;②点
;③点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/323eac2660c1237e28652c21e1f06f0a.png)
(2)若点
,求点
的“恒定线”的解析式.
(3)已知点
,
为任意实数,当m变化时,点
在它的“恒定线”上运动,若点
的“恒定线”与两条坐标轴围成了等腰直角三角形,求此时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cbe6202893ff79971059c4c405f671d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bf4badc1b00534aefdc9508f8e6f636.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6781f63dc45db89a7928ff55cbf2acd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cc89683ee95aea9f4aff0f73c8ed8cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44078124e6c21ccdd2e0236836ae4bb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a985aa7bff13665fb7ff50f8e2f3677a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8f61b07350d76075256ed41fe28b2fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44078124e6c21ccdd2e0236836ae4bb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cc89683ee95aea9f4aff0f73c8ed8cc.png)
(1)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d23c69a9f33114d3816a5621cc93047e.png)
①点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33150d932dc16339c6259ae5d4c24765.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f8d49d43ee6c55b2f56c5c3e59d21ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/323eac2660c1237e28652c21e1f06f0a.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a83ed70a24fc49a0414a4cef116a2c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd2a741c448866114619416422860d3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.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/f0a532e15e232cb4b99a8d4d07c89575.png)
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真题
【推荐2】如图,一次函数
的图象与
轴的正半轴交于点
,与反比例函数
的图像交于
两点.以
为边作正方形
,点
落在
轴的负半轴上,已知
的面积与
的面积之比为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/aa21bbca-6de1-4809-b091-279a8f580deb.png?resizew=295)
(1)求一次函数
的表达式:
(2)求点
的坐标及
外接圆半径的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/646e11d5bff57e56ce82c2339f2d71ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc793a6afea747370cae351b53efd46e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/d4686f39b38d5b90309ee73ed89a0640.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa9c934d84feba963335cc7edf01610e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/aa21bbca-6de1-4809-b091-279a8f580deb.png?resizew=295)
(1)求一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dc6b0f69ed7e3633248f6b1c093e874.png)
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【推荐1】如图,已知
与
,
平分
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/52e82dc4-c49e-42b1-ba63-8156572473d4.png?resizew=560)
(1)如图1,
与
的两边分别相交于点D、E,
,试判断线段
与
的数量关系,并说明理由.
以下是小宇同学给出如下正确的解法:
解:
.
理由如下:如图1,过点C作
,交
于点F,则
,
请你根据小宇同学的证明思路,写出该证明的剩余部分.
(2)若
,
.
①如图3,
与
的两边分别相交于点D、E时,写出线段
、
、
的数量关系 ;
②如图4,
的一边与
的延长线相交时,写出线段
、
、
的数量关系 ;
若
,
的面积为a,则
的面积= (用含a的代数式表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1384d0a02d097ac7aa8a19e8da6f9767.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/52e82dc4-c49e-42b1-ba63-8156572473d4.png?resizew=560)
(1)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1384d0a02d097ac7aa8a19e8da6f9767.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c5b087fab35cd68bffd8085a1cd97ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
以下是小宇同学给出如下正确的解法:
解:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eaffcd2070bfcb1955e2cab66c26c06.png)
理由如下:如图1,过点C作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb3d9ab191469ee8d11e71d2bb332a26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/637dcfa3c67894b15ba927891ac37d40.png)
请你根据小宇同学的证明思路,写出该证明的剩余部分.
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ff5c21185c13eae675906dabd3593c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5df3be4e18c4662478953781e1a6199.png)
①如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1384d0a02d097ac7aa8a19e8da6f9767.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
②如图4,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1384d0a02d097ac7aa8a19e8da6f9767.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/106b2e54f4e18ea9092ecac8ef93a83f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4807ca16360c0cca436e59d4be98f626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fb6772cca18f6f1cfb7c961a425c8b2.png)
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【推荐2】如图,在△ABC中,AB=AC,D、E是△ABC内的两点,AE平分∠BAC,∠D=∠DBC=60°,若BD=5cm,DE=3cm,求BC的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/27/bf9321b7-39f3-4ea0-9ab2-5a7206069a50.png?resizew=148)
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(0.65)
【推荐1】如图,一次函数
的图象分别交y轴,x轴于点D,
,与反比例函数
的图象相交于A,B两点,
于点C,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/fdbb71fd-03d1-42aa-9168-b9399c01f4dd.png?resizew=167)
(1)求一次函数与反比例函数的解析式.
(2)请直接写出关于x的不等式
的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95fb8b61d7fa8ecd5ea45762c7400e6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/622a7aca2bc5b3c995290f72d465da76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bde98b608331387ffbfaab1845cb662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b92bdf778aa32f238bad820d72d62f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3208a0c9090677ab6b50ee9c98c9534.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/10/fdbb71fd-03d1-42aa-9168-b9399c01f4dd.png?resizew=167)
(1)求一次函数与反比例函数的解析式.
(2)请直接写出关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9947b8c30cfb494d81e94d744d340245.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,一次函数
的图象与反比例函数
的图象交于
、B两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/12/c2e8aeea-7975-40d2-8b56-4b2668b911c0.png?resizew=194)
(1)求m的值与反比例函数表达式;
(2)若
,请写出x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a59d858d7687b017f6cd3352e9694610.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d105b74c40724a7da626e7c42afbf5fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0a525f01f2562ea2efc3bf5edd8a8aa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/12/c2e8aeea-7975-40d2-8b56-4b2668b911c0.png?resizew=194)
(1)求m的值与反比例函数表达式;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f99df1a7b58018125b99578b779342.png)
您最近一年使用:0次