如图,四边形OABC是平行四边形,边OC在x轴的负半轴上,反比例y=
(k<0)的图象经过点A与BC的中点F,连接AF、OF,若△AOF的面积为9,则k的值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abb3a62e46296c417261156b51ec6b4.png)
![](https://img.xkw.com/dksih/QBM/2018/5/28/1954922818248704/1957420030222336/STEM/f7ade402a4404a729d466487e70904cb.png?resizew=151)
更新时间:2018-05-31 22:44:09
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【推荐1】如图,平行于y轴的直线与函数
和
的图象 分别交于A、B两点,OA交双曲线
于点C,连接CD,若△OCD的面积为4,则k=______ .
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【推荐2】如图,正方形
与反比例函数
在第一象限内的图象交于
两点,
上的点
满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/1/26bbc103-308f-4bb5-86c0-8f3c0fe5c414.png?resizew=146)
(1)若
,
,则
的长为____ ;
(2)若
的面积为
,则实数
的值为____ .
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(1)若
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(2)若
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【推荐1】已知
的周长为20,且
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【推荐2】用50cm长的绳子围成一个平行四边形,使相邻两边的差为3cm,则较短的边长为_________ cm.
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