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在平面直角坐标系xOy中对于任意三点ABC的矩面积给出如下定义水平底a任意两点横坐标差的最大值铅垂高h任意两点纵坐标差的最大值则矩面积S=ah．例如三点坐标分别为A12B-31C2-2则水平底a=5铅垂高h=4矩面积S=ah=20．1已知点A12B-31P0t．①若ABP三点的矩面积为12求点P的坐标②ABP三点的矩面积的最小值为2已知点E40F02Mm4m其中m＞0．若EFM三点的矩面积的为8求m的取值范围．
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