若x,y,z成等差数列,则(z-x)^2-4(x-y)(y-x)=

1.设X ,Y,Z 成等差数列,代数式（X-Z）*（X-Z）+ 4(X-Y)(Z-Y)= 已知三个实数x,y,z满足条件(z-x)^2-4(x-y)(y-z)=0,求证:x,y,z成等差数列 已知三个实数x,y,z满足(z-x)平方-4(x-y)(y-z)=0.求证x,y,z成等差数列 若4x=7y+5z,2x+y=z,则x:y:z的值为 (x+y-z)(x-y+z)= 若{x+3y+10z=0 则 (x+y-z)/(x-y+z) 设X,Y,Z为实数,2X,3Y,4Z成等比数列,且1／X,1／Y,1／Z成等差数列,则X/Z+Z/X的值是 (y-x)/(x+z-2y)(x+y-2z)+(z-y)(x-y)/(x+y-2z)(y+z-2x)+(x-z)(y-z 若z分之x+y+z=y分之x-y+z=x分之-x+y+z,求xyz分之(x+y)(y+z)(z+x) 试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y) 若x-2y+4z=1,x+3y-7z=0,则y:z=? X+Y+Z=?