[6xy-3(xy-2分之1x^2y]除3xy,其中x=2002,y=2003
问题描述:
[6xy-3(xy-2分之1x^2y]除3xy,其中x=2002,y=2003
答
[6xy-3(xy-2分之1x^2y]除以3xy=[3xy-x^2y/2]/3xy=1-x/6
当x=2002,y=2003时,原式=1-1001/3=-998/3