初二比例线段及性质的题若 X/2 = Y/3 = Z/5 ,且XYZ不等于0,则X+Y+Z/3X-Y =
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初二比例线段及性质的题若 X/2 = Y/3 = Z/5 ,且XYZ不等于0,则X+Y+Z/3X-Y =
初二比例线段及性质的题
若 X/2 = Y/3 = Z/5 ,且XYZ不等于0,则X+Y+Z/3X-Y =
初二比例线段及性质的题若 X/2 = Y/3 = Z/5 ,且XYZ不等于0,则X+Y+Z/3X-Y =
设K法 x为2K y为3K z为5K 带进去就行了