如图,已知正方形OABC的面积为9,点O为坐标原点,点A在x轴上,点C在y轴上,点B在函数y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101236827487737/SYS201311031012368274877002_ST/0.png)
的图象上,点P(m,n)是函数
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101236827487737/SYS201311031012368274877002_ST/1.png)
(k>0,x>0)的图象上的一点(与点B不重合),过点P分别作x轴、y轴的垂线,垂足分别为E、F.并设阴影部分为S.
(1)求B点坐标和k的值;
(2)求S关于m的函数关系式;
(3)当S=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101236827487737/SYS201311031012368274877002_ST/2.png)
时,求点P的坐标.
考点分析:
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