1998(z-y)+1999(y-z)+2000(z-x)=0 1998²(z-y)+1999²(y-z)+2000²(z-x)=0求z-y的值

问题描述:

1998(z-y)+1999(y-z)+2000(z-x)=0 1998²(z-y)+1999²(y-z)+2000²(z-x)=0求z-y的值
1998(x-y)+1999(y-z)+2000(z-x)=0 1998²(x-y)+1999²(y-z)+2000²(z-x)=0
求z-y的值

1998(x-y)+1999(y-z)+2000(z-x)=0 (1)19982(x-y)+19992(y-z)+20002(z-x)=0 (2)(1)展开化简后,得1998x-1998y+1999y-1999z+2000z-2000x=0-2x+y+z=0 (3)(2)展开化简后,得1998^2 x-1998^2 y+1999^2 y-1999^2 z+2000^...