已知2x-y=1/3,xy=2,求2x^4y^3-x^3y^4的值
问题描述:
已知2x-y=1/3,xy=2,求2x^4y^3-x^3y^4的值
答
2x^4y^3-x^3y^4
=x³y³(2x-y)
=(xy)³(2x-y)
=2³×(1/3)
=8/3