如图,在平面直角坐标系中,点C、A分别在x轴、y轴上,AB∥x轴,∠ACB=90°,反比例函数y=
(x>0)的图象经过AB的中点M.若点A(0,4)、C(2,0),则k的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d6eb294f1e03122b715424e6b68cc99.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/12/c8dd78dd-55ea-48b5-a78c-85f75964704e.png?resizew=230)
A.16 | B.20 | C.32 | D.40 |
更新时间:2020-06-30 12:38:13
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【推荐1】如图,点
、点
均在反比例函数
的图象上,分别连结
、
,若
,则点
的坐标为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/ebeb6187-a336-407c-8c8d-61b66e63a385.jpg?resizew=145)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,在Rt△OAB中,∠OBA=90°,OA在
轴上,AC平分∠OAB,OD平分∠AOB,AC与OD相交于点E,且OC=
,CE=
,反比例函数
的图象经过点E,则
的值为( )
![](https://img.xkw.com/dksih/QBM/2021/4/12/2698453256151040/2702532707262464/STEM/1698d49e-a6c9-4226-b38b-19b915bddee3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,矩形ABCD中,E为CD的中点,连接AE并延长交BC的延长线于点F,连接BD交AF于H,AD=10
,且tan∠EFC=
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A.![]() | B.![]() | C.10 | D.5 |
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【推荐2】如图,已知A(﹣2,0),以B(0,1)为圆心,OB长为半径作⊙B,N是⊙B上一个动点,直线AN交y轴于M点,则△AOM面积的最大值是( )
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A.2 | B.![]() | C.4 | D.![]() |
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