已知x+2y-3x=-1/3,xyz=2,求3/2x²yz+3xy²z-9/2xyz的值 help~
问题描述:
已知x+2y-3x=-1/3,xyz=2,求3/2x²yz+3xy²z-9/2xyz的值 help~
答
3/2x²yz+3xy²z-9/2xyz
=3/2xyz(x+2y-3z)
=3/2*2*(-1/3)
=-1