如图,矩形ABCD的顶点A在第一象限,AB∥x轴,AD∥y轴,且对角线的交点与原点重合,在边AB从小于AD到大于AD的变化过程中,若矩形ABCD的周长始终保持不变,则经过动点A的反比例函数
中,k的值的变化情况是( )
![](https://img.xkw.com/dksih/QBM/2014/9/29/1573751662895104/1573751668785152/STEM/20a18149ee4e42798b81e287377ca28f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30aed0ed5484dd34fb1fe6ab590f3373.png)
![](https://img.xkw.com/dksih/QBM/2014/9/29/1573751662895104/1573751668785152/STEM/20a18149ee4e42798b81e287377ca28f.png)
A.一直增大 | B.一直减小 | C.先增大后减小 | D.先减小后增大 |
更新时间:2019-01-30 18:14:09
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【知识点】 根据图形面积求比例系数(解析式)解读
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【推荐1】如图,矩形
的顶点
,
分别在
轴、
轴的正半轴上,点
在
上,且
,反比例函数
(
)的图象经过点
及矩形
的对称中心
,连接
,
,
.若
的面积为6,则
的值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/3149d5b7-5066-4f71-a6e6-421cffc51686.png?resizew=167)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b1c68c71dedc4f7767be51893e60924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/3149d5b7-5066-4f71-a6e6-421cffc51686.png?resizew=167)
A.6 | B.7 | C.8 | D.9 |
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【推荐2】如图,
,点
在反比例函数
的图象上,过
的反比例函数解析式为( )
![](https://img.xkw.com/dksih/QBM/2022/5/29/2989914904739840/2991236251385856/STEM/cd15dbc8-9735-497b-9fe7-36640be4eb0d.png?resizew=263)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed1df17440481c8da8e0a17f008dbc4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2a59ef154d29e88a2934239e27fcbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/2022/5/29/2989914904739840/2991236251385856/STEM/cd15dbc8-9735-497b-9fe7-36640be4eb0d.png?resizew=263)
A.![]() | B.![]() | C.![]() | D.![]() |
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