在平面直角坐标系中有三点
,
,
,其中有两点同时在反比例函数
的图象上.将这两点分别记为
,另一点记为
.
(1)求出
的值;
(2)求直线
对应的一次函数的表达式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5265d99095b635f62c7915298ec0e963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0481d24e2af1e0cd348732b9444d1dde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0f9f734c03d04c21edefa08e0acc1fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(1)求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
更新时间:2020-05-01 09:15:45
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适中
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【推荐2】
年正月十六晚,汝阳“在水一方醉美汝阳”烟火晚会隆重举行.据气象部门预报,当晚大气温度是
,寒冷的天气阻止不了群众观看的热情,小明与小亮也不例外.据有关资料研究表明:声音在空气中的传播速度
简称声速,它与气温
有如表所反映的函数关系:
(1)观察表格数据,
与
之间的函数关系符合我们学习过的______函数,由此表格中
______.求出
与
之间的函数关系式;
(2)小亮在距燃放中心约
米的地方观看,他看到烟花放多少秒后才能听到声响?
(3)小明在瑞云山上观看,他、小亮与燃放中心正好在一条线上,已知他看到烟花放5秒后才听到声响,直接写出小明与小亮所在地的大约距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e8936c9fe1e81726455908657a29fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81d9e8b067df7c168b280cc2d1042789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd52cb4f08d10c68f259368d117c4c63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92eb344efadc264d96753473f7327c69.png)
气温 | ||||||
声速 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)小亮在距燃放中心约
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2868c27b6b8e97ef619fe6fea776c0ff.png)
(3)小明在瑞云山上观看,他、小亮与燃放中心正好在一条线上,已知他看到烟花放5秒后才听到声响,直接写出小明与小亮所在地的大约距离.
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解答题-问答题
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适中
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【推荐1】已知一次函数
与双曲线
在第一象限交于
、
两点,
点横坐标为
,
点横坐标为
.
![](https://img.xkw.com/dksih/QBM/2021/11/4/2843934630985728/2844947403513856/STEM/51973f9a-2b86-4785-a0d2-78ab14c29922.png)
(1)求一次函数的解析式;
(2)根据图象直接写出不等式
的解集;
(3)点
是
轴正半轴上一个动点,过
点作
轴的垂线分别交直线和双曲线于
、
,设
点的横坐标是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
,
的面积为
,求
和
的函数关系式,并指出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/646e11d5bff57e56ce82c2339f2d71ce.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/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1e8babee63bfc889ae5a34632284bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://img.xkw.com/dksih/QBM/2021/11/4/2843934630985728/2844947403513856/STEM/51973f9a-2b86-4785-a0d2-78ab14c29922.png)
(1)求一次函数的解析式;
(2)根据图象直接写出不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59a7350611049144cd781e9a9f5e42b2.png)
(3)点
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dd27dc03f369fada3e95adc999f234b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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真题
【推荐2】如图,反比例函数
与一次函数y=x+b的图象,都经过点A(1,2)
![](https://img.xkw.com/dksih/QBM/2013/9/12/1573683261390848/1573683267616768/STEM/6ed7ca9cdea649cb9d26560f7beacc91.png)
(1)试确定反比例函数和一次函数的解析式;
(2)求一次函数图象与两坐标轴的交点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a90056c1ea08fd310c2ba5ae6650856.png)
![](https://img.xkw.com/dksih/QBM/2013/9/12/1573683261390848/1573683267616768/STEM/6ed7ca9cdea649cb9d26560f7beacc91.png)
(1)试确定反比例函数和一次函数的解析式;
(2)求一次函数图象与两坐标轴的交点坐标.
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