(-3x²y)³(-2xy³z)²
已知实数x、y、z满足(x²-6xy+10y²+4y)y²+4y+|(z-3/2)
-2y³+(3xy²-x²y)-2(xy²-y³)
如果2x=y+z 3x+2y-12z=0且z≠0,求(2z²+3xy+y²)/(y²+z&
计算:(-7x²y)(2x²y-3xy³+xy)
(xy的2次方z的3次方)²×(-2x²y)³=?
已知xyz满足|x-2|+(3y-1)+(z-2)²=0,则(-3xy)*(-x²z)*6xy=
(x²+y²-z²+2xy)/(x²-y²+z²-2xz)计
已知1x-11+(y-2)²+√z+3=0,求xy+√z²的值
已知√x-3+|y-1|+(z+2)²=0,求2xy+z的平方根
已知x/3=y/4=z/6,求(xy+yz+xz)/(x²+y²+z²)
正整数x、y、z满足x&3-y&3-z&3=3xyz,x²=0(y+z),则xy+yz+xz=()
设z=xln(xy)求∂3z/∂x²∂y及∂3z/∂