问一道比例题目:3x=4y,4x=5z问:1)y:z=():()2)x:y:z=():():()
一道垃圾数学题已知4x=3y+5z, 2x+y=z 问X·X:Y·Y:Z·Z=多少 ,也就是X的平方比 Y的平方比Z的平
题目:A=y(x-y)(x-z)+z(x-y)(z-x) 问:(1)将多项式A分解因式(2) x/2=y/3=z/4,求
已知3x+2y=4+z,2x+2z=6+y,问是否存在x、y、z的正整数值,使得x+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.
A=y(x-y)(x-z)+z(x-y)(z-x) 问:(1)将多项式A分解因式(2) x/2=y/3=z/4,求A/(
一道数学题,已知x+y+z=1,x^2+y^2+z^2=2,问xy+yz+zx,x^3+y^3+z^3
一道数奥题,(x+y-z)²+(y+z-4)=-|z+x-5|
x-y-z=-1 3x+5y+7z=11 4x-y+2z=-1 分别求出x=?y=?z=?
已知2x+3y-4z=0,3x+4y+5z=0,求x+y+z/(除以)x-y+z的值.
{5x-3y+z=2{5x+2y-4z=3{-5x+y-z=2 {x-y-z=-1{3x+5y+7z{4x-y+2x=-
已知3x-2y-5z=0,2x-5y+4z=0,且x,y,z都不为0,求(3x*x+y*y+4z*z)/(5x*x+y*
解方程组2x-y+2z=6 3x+y-3z=-4 x+y+z=6 问: