[4/（x^2-y^2)+（x+y)/(xy^2-x^2y)] / (x^2+xy-2y^2)/(x^2y+2xy^2)

hh10272022-10-04 11:39:541条回答

[4/（x^2-y^2)+（x+y)/(xy^2-x^2y)] / (x^2+xy-2y^2)/(x^2y+2xy^2) 其中,a=13,b=12

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tgj2008 共回答了22个问题 | 采纳率95.5%: =[-(X-Y)/XY(X=Y)]*[XY/(X-Y)]=-1/(X+Y)=-1/25; 1年前

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