求三平面x+3y+z=1,2x-y-z=0,-x+2y+2z=0的交点是
求三平面x+3y+z=1,2x-y-z=0,-x+2y+2z=0的交点是
已知x^3+y^3-6x+2y+z+3+10=0,求(x-y+z)(x+y-z)的值.(z+3)是绝对值
已知三平面:2x+y+z-3=0,x-y+2z-3=0,x+z-3=0,求直截面三角形的面积
已知x、y、z满足方程组:x+y-z=6;y+z-x=2;z+x-y=0 求x、y、z的值
求直线2x+2y-z=1 3x+8y+z=6与平面2x+2y-z+6=0的夹角
如果|x+y+z-6|+|2x+3y-z-12|+|2x-y-z|=0求x,y,
设X+Y+Z=0求X^3+X^2Z-XYZ+Y^2Z+Y^3的值
若x/2=y/3=z/4不等于0,求x+y+z/x+y-z的值
已知x,y,z满足方程组{x+y-z=6{y+z-x=2{z+x_y=0,求x,y,z的值
|X-3|+| Y-2|+|Z-1|=0,求3x+2y +Z的值
已知x+y-z=0,2x-y+2z=0 求(3x-2y+5z)/(5x-3y+2z)的值
已知4x-3y+z=0,x+2y-8z=0,xyz不等于0,求x+y-z/x-y+2z的值