已知3x-y=1/16,xy=2,求6x^4y^3-2x^3y^4

问题描述:

已知3x-y=1/16,xy=2,求6x^4y^3-2x^3y^4

6x^4y^3-2x^3y^4
=2x^3y^3*(3x-y)
=2*2^3*1/16
=2*8*1/16
=1