以知{4x-3y-3z=0;x-3y+z=0(x≠0,y≠0,z≠0)求(1)x:y:z,(2)2x+y-z/z

问题描述:

以知{4x-3y-3z=0;x-3y+z=0(x≠0,y≠0,z≠0)求(1)x:y:z,(2)2x+y-z/z

4x-3y-3z=0;x-3y+z=0(x≠0,y≠0,z≠0)
因此,3Y=2Z=2X,所以:
(1)x:y:z=X:2/3X:X=1:2/3:1=3:2:3
(2)(2x+y-z)/z=(2x+2/3x-x)/x=(1+2/3)x/x=5/3