如图,在平面直角坐标系中,一次函数
与反比例函数
的图像交于
两点,一次函数
的图像与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/6ac0d0dd-c78b-4df5-bb58-d8fb7c6ef012.png?resizew=157)
(1)求一次函数的解析式:
(2)点P是x轴上一点,且
的面积等于
面积的2倍,求点P的坐标.
(3)根据数的图像,直接写出不等式
的解集;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d752f80003886f8e6bdcd8e77280450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7251780d8f3e13915e03b8f4e3426627.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/6ac0d0dd-c78b-4df5-bb58-d8fb7c6ef012.png?resizew=157)
(1)求一次函数的解析式:
(2)点P是x轴上一点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3877c5dd48bc7311f79a38de74a6cab4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
(3)根据数的图像,直接写出不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eac14f4ce3939c510243436126d78c5.png)
更新时间:2023-06-13 08:32:49
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【推荐1】如图,在平面直角坐标系中,抛物线
,与y轴交于点A,与x轴交于点E、B,连接
、
,且点
,
,点P为抛物线上的一动点.
![](https://img.xkw.com/dksih/QBM/2022/11/28/3119523819069440/3129496288165888/STEM/a570baaadfb74c6c88a4a8c6b8cdb7e0.png?resizew=249)
(1)求抛物线的解析式;
(2)如图,过点
作
平行于
轴,交抛物线于点
,若点
在
的上方,作
平行于
轴交
于点
,连接
,
,当
时,求点
坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78aae990ed6cf61fddfc9cbeae60388d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb4e3225010924edfd6e456e3fb1f4d8.png)
![](https://img.xkw.com/dksih/QBM/2022/11/28/3119523819069440/3129496288165888/STEM/a570baaadfb74c6c88a4a8c6b8cdb7e0.png?resizew=249)
(1)求抛物线的解析式;
(2)如图,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/60ef95894ceebaf236170e8832dcf7e3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
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【推荐2】如图(1),在平面直角坐标系中,
,
,过C作
轴,且满足
.
(1)求三角形
的面积.
(2)若过B作
交y轴于D,且
分别平分
,如图2,求
的度数.
(3)在y轴上是否存在点P,使得三角形
和三角形
的面积相等?若存在,求出P点坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c240561788bc63f41a6703219fb66d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8234318323beb7198c239526066cefcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02db4a8c065ddf418ce67b8a98a29c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdffbe01db292152b30bb8da8613ce6b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/14/6ca63cc8-9fd1-4ec4-9aa2-72048f925c91.png?resizew=510)
(1)求三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若过B作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c631670e02d2a38e9c78708a3916140.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a56dec16d1d3b76a2a292293d09907e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b74680fc570af9f5c0d28e6a0df9231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cd1bc0388e7fad3e849ca39c67f5034.png)
(3)在y轴上是否存在点P,使得三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3df5935c893580c77ab6fa6eb0a70bdb.png)
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【推荐1】学习完“一元一次不等式与一次函数”后,老师给出了这样一道练习题:如图,直线
与直线
交于点
,求不等式
的解集.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/643c2d18-caae-46ee-9a30-db30052709b9.png?resizew=250)
同学们都感觉这道题很容易,通过观察图像快速写出了这道题的答案是:__________.
接着,老师又提出了一个具有挑战性的题目:求不等式:
的解集.小明所在的数学兴趣小组展开了对这个问题的探究:探究的思路是借助函数图像解决问题.
(1)首先画出函数
的图像.
①列表:如表是
与
的几组对应值,其中
__________;
②描点:根据表中的数值描点
,请补充描出点
;
③连线:用平滑的曲线顺次连接各点,请画出函数图像.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/916b0fd8-8e51-4011-b6dd-3e4516a69542.png?resizew=300)
(2)观察分析图像特征,结合已有的学习经验和该函数的性质,写出不等式
的解集是___________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b9f0b9e53a83e68f5fec944f343119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5343f6dee6d12906b09ff03166350a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05ea851396b4aeb04e881f3f33e4eec7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/643c2d18-caae-46ee-9a30-db30052709b9.png?resizew=250)
同学们都感觉这道题很容易,通过观察图像快速写出了这道题的答案是:__________.
接着,老师又提出了一个具有挑战性的题目:求不等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce12eea84b0d6a319e737ddc4b34733.png)
(1)首先画出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/779863180ca28077bfc99566e5d62f96.png)
①列表:如表是
![](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/380bbacf854e30e2e747fc286d2b9997.png)
![]() | … | ![]() | ![]() | ![]() | ![]() | 0 | ![]() | 1 | ![]() | 2 | … |
![]() | … | ![]() | ![]() | 1 | ![]() | ![]() | ![]() | 1 | ![]() | ![]() | … |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a79a33a83a7ba57a34b5093d1d1d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4a90cfdbfa05577b6ec0b22739e7c7.png)
③连线:用平滑的曲线顺次连接各点,请画出函数图像.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/916b0fd8-8e51-4011-b6dd-3e4516a69542.png?resizew=300)
(2)观察分析图像特征,结合已有的学习经验和该函数的性质,写出不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce12eea84b0d6a319e737ddc4b34733.png)
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【推荐2】如图,在方格纸中建立直角坐标系,已知一次函数y1=-x+b的图象与反比例函数
的图象相交于点A(5,1)和A1.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/5832a4b5-5491-4579-bf15-846910aa5c1e.png?resizew=307)
(1)求这两个函数的关系式;
(2)由反比例函数
的图象特征可知:点A和A1关于直线y=x对称.请你根据图象,填写点A1的坐标及y1<y2时x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d105b74c40724a7da626e7c42afbf5fa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/5832a4b5-5491-4579-bf15-846910aa5c1e.png?resizew=307)
(1)求这两个函数的关系式;
(2)由反比例函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d105b74c40724a7da626e7c42afbf5fa.png)
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解答题-作图题
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【推荐1】【背景】在一次物理实验中,小冉同学用一固定电压为
的蓄电池,通过调节滑动变阻器来改变电流大小,完成控制灯泡
(灯丝的阻值
)亮度的实验(如图),已知串联电路中,电流与电阻
、
之间关系为
,通过实验得出如下数据:
(1)
___________,
___________;
(2)【探究】根据以上实验,构建出函数
,结合表格信息,探究函数
的图象与性质.
①在平面直角坐标系中画出对应函数
的图象;
(3)【拓展】结合(2)中函数图象分析,当
时,
的解集为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a9e557b18168d9ec84e65fb46057d72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee10b15238789eff8bcc496fa524cb34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b137cb08892c19a4c89403f18fb47ef9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/845e77667b36e2d37cb2532dcc72c52c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66dd89cd16ba0e81d08261fecb0f41c.png)
![]() | … | 1 | 2 | ![]() | 4 | 6 | … |
![]() | … | ![]() | 3 | ![]() | 2 | ![]() | … |
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
(2)【探究】根据以上实验,构建出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df3725f9821c2d7a481f2c349711c404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df3725f9821c2d7a481f2c349711c404.png)
①在平面直角坐标系中画出对应函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df3725f9821c2d7a481f2c349711c404.png)
(3)【拓展】结合(2)中函数图象分析,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04bebd12e0156bd58b1e143b5f87590e.png)
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解答题-计算题
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【推荐2】某同学在研究一个函数时,利用计算机,设计了一个如图所示的流程图.若输入
,输出
;输入
,输出
;输入
,输出
.
,
,
;
(2)在平面直角坐标系中,请作出
时的函数图象;
(4)根据函数图象,直接写出关于x的方程
解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a089c207e39a24d0d82aa853ac2bbb8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefa44964db83759aff6fc8dd7ef8f28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b650820d7bed48ed67a2869ad8c65ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefa44964db83759aff6fc8dd7ef8f28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d599059e6b2c918ab15ee22611b6962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c50866229ec5a3640fb250f9bd2192b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
(2)在平面直角坐标系中,请作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
(4)根据函数图象,直接写出关于x的方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0929b6932cbc519f64610fe976268d86.png)
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