若|x-2y+1|+|x-z-3|+(z+y-5)的平方=0,则xy+z的平方的值为
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若|x+3|+|y-2|+|2×z+1|=0求(x×z-y×z)(y-x+z)的值
若x+y+z=3y=2z,则x/x+y+z=?
若xyz=1,求证 x^2/(y+z)+y^2/(z+x)+z^2/(x+y)≥3/2
若x:y:z=3:2:1,则x+2y-z/2x-y+z=
已知x::y:z=3:4:5,(1)求x+y分之z的值;(2)若x+y+z=6,求x,y,z.
已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值
已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值
x+y+z=6 x+2y+3z=14 y+1=z
1、y-x/x²-y²2、(x-y)(y-z)(z-x)/(z-y)(y-x)(x-z)
求解一道数学题若x+y+z+3=2(根号x+根号y+1+根号z-1),求(x+y+z)的(y-z)次方
若x+y+z+3=2(根号x+根号y+1+根号z-1)求(x+y+z)y-z
matlab解对数方程组[x,y,z]=solve('0.29744*x/(3+0.1*x+y+z)=(log10((3+x+y+z)/(3+0.1*x+y+z)))^2','0.79*x/(3+0.1*y+z)=(log10((3+x+y+z)/(3+0.1*x+y+z)*(3+y+z)/(3+0.1*y+z)))^2','1.25*x/(3+0.1*z)=(log10((3+x+y+z)/(3+0.1*x+y+z)*(3+y+z)/(3+0.*1y+z)*(3+z)/
设x,y.z为实数,2x.3y.4z是等比数列,1/x,1/y.1/z是等差数列,则(x/z)+(z/x)是多少?
如果,根号x-3+| y-2 |+z^2=2z-1 求 (x+z)^y
{x+y+z=1;x+3y+7z=-1;z+5y+8z=-2
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z
若|x-3|+|y+2|+|2z+1|=0,求(xy-yz)(y-x+z)