通分 1/3xy³,1/2x²y,1/9x³y

问题描述:

通分 1/3xy³,1/2x²y,1/9x³y

通分
1/3xy³=6x^2/18x^3y^3
1/2x²y=9xy^2/18x^3y^3
1/9x³y=2y^2/18x^3y^3