已知一次函数y=-3/4x+6 的图像与坐标轴交与A.B点,AE平分∠BAO,交x轴于点E1.求点B坐标2.求直线AE的表达式3.过点B做BF⊥AE垂足为F,联结OF,试判断△OFB的形状,并求△OFB的面积4.若将已知条件“AE平分∠

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