1.如圖,已知正方形OABC的面積為9,點(diǎn)O為坐標(biāo)原點(diǎn),點(diǎn)A在x軸上,點(diǎn)C在y軸上,點(diǎn)B在函數(shù)y=
(k>0,x>0)圖象上,點(diǎn)P是函數(shù)y=
(k>0,x>0)圖象上異于點(diǎn)B的任意一點(diǎn),過(guò)點(diǎn)P分別作x軸、y軸的垂線,垂足分別為點(diǎn)E、F.設(shè)矩形OEPF和正方形OABC不重合部分的面積為S.
(1)點(diǎn)B的坐標(biāo)是
,k=
;
(2)當(dāng)S=
,求點(diǎn)P的坐標(biāo);
(3)求出S關(guān)于m的函數(shù)關(guān)系式.