x+y分之xy除x平方y立方分之x+y

问题描述:

x+y分之xy除x平方y立方分之x+y

[xy/(x+y)] /[(x+y)/(x²y³)]=(x³y­²y²)/(x+y)²

x+y分之xy除x平方y立方分之x+y
=(x+y)分之(xy)×(x+y)分之(x²y³)
=(x+y)²分之(x³y^4)