化简求值(2x-y+3z)(-2y-y-3z)-(x+2y-3z)^2,其中X=1,y=-1,z=1
3道高数题,1,函数F(x,y,z)=(e^x) * y * (z^2) ,其中z=z(x,y)是由x+y+z+xyz=
化简求值:(2x-y+3z)(-2x-y-3z)-(x+2y-3z)2,其中x=1,y=-1,z=1.
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
{x+y+z=1;x+3y+7z=-1;z+5y+8z=-2
x+2y=3 x+y+z=36 2x+y+z=15 2y=3z x-y=1 x+2y+z x-z=-1 2x+z-y=1
如果,根号x-3+| y-2 |+z^2=2z-1 求 (x+z)^y
三元一次方程组数学题x+2y+2z=33x+y-2z=72x+3y-2z=10x-y=2z-x=3y+z=-1x-y-z
x/2=y/3=z/5 x+3y-z/x-3y+z
2x-2y+z=0 2x+y-z=1 x+3y-2z=1
X+Y+Z=352X=Y+51/3Y=1/2Z
x+2y-z=1 3x-3y+z=2 3x+3y+z=7
3x+2y+z=14 x+y+2z+-3 2x+3y-z=1