已知2x-y=1/8,xy=2,求2x4y3-x3y4的值.
问题描述:
已知2x-y=
,xy=2,求2x4y3-x3y4的值. 1 8
答
2x4y3-x3y4=x3y3(2x-y)=23×
=1.1 8