已知2x-y=1/8,xy=2,求2x4y3-x3y4的值.

问题描述:

已知2x-y=

1
8
,xy=2,求2x4y3-x3y4的值.

2x4y3-x3y4=x3y3(2x-y)=23×

1
8
=1.