如果2^x=5^y=10^z,试以x及y表示z
如果实数x,y,z满足x^2+y^2+z^2-(xy+yz+zx)=8,用A表示|x-y|,|y-z|,|z-x|中的最
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
如果|x+y+z-6|+|2x+3y-z-12|+|2x-y-z|=0求x,y,
x/2=y/3=z/5 x+3y-z/x-3y+z
如果,根号x-3+| y-2 |+z^2=2z-1 求 (x+z)^y
(x+y-z)(x-y+z)=
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai
3x+2y+z=14 ,x+y+z=10,z+2x+3y=1 5
{5X+Y+Z①X+5Y+Z=-2②X+Y+5Z=10③
{2x+3y-4z=-5 x+y+z=6 x-y+3z=10
已知3x=4y,2y=5z,试求x:y:z
3x=4y 2y=5z 试求x:y:z