2,x,y,z,32成等比数列,求x,y,z.
已知整数x,y,z成等差数列,x+y,y+z,z+x成等比数列,且x+y+z∈(40,45),求此三个数
三个整数x,y,z成等差数列,其和介于40与44之间,且x+y,y+z,z+x成等比数列,求此三数
设x,y,z是实数,3x,4y,5z成等比数列,且x分之1,y分之1,z分之1成等差数列,求z分之x加x分之z的值
设x,y,z 都属于R,且(x-z)²-4(x-y)(y-z)=0,求证:x,y,z成等比数列.
(y-x)/(x+z-2y)(x+y-2z)+(z-y)(x-y)/(x+y-2z)(y+z-2x)+(x-z)(y-z
解方程组2X+Y+Z=32,X+2Y+Z=19,X+Y+2Z=21,求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
x,y,z正整数 x>y>z证明 x^2x +y^2y+z^2z>x^(y+z)*y^(x+z)*z^(x+y)
已知x、y、z满足方程组:x+y-z=6;y+z-x=2;z+x-y=0 求x、y、z的值
x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,
x y z x+y--- = --- = ---- ----y+Z z+x x+y ,求 z 的值 .求 x+y----
化简(y-x)(z-x)/(x-2y+z)(x+y-2z)+(z-y)(x-y)/(x-2z+y)(y+z-2x)+(x