If `x/2+2/y=1` and `y/2+2/z=1`, then the value of `z/2+2/x` is:

If the line (x-2)/-1=(y+2)/1=(z+k)/4 is one of the angle bisector of the lines x/1=y/-2=z/3 and x/-2=y/3=z/1 then the value of k is

If x=1, y=2, z=-1 then find the value of z^2-2xy(x-y)

If x = 2a- 1, y = (2a - 2) and z =3 - 4a, then the value of x ^(3) + y ^(3) + z ^(3) will be :

If xyz = 1 and x, y, z gt 0 then the minimum value of the expression (x+2y)(y+2z)(z+2x) is

If (x_(0), y_(0), z_(0)) is any solution of the system of equations 2x-y-z=1, -x-y+2z=1 and x-2y+z=2 , then the value of (x_(0)^(2)-y_(0)^(2)+1)/(z_(0)) (where, z_(0) ne 0 ) is

If the plane 2x-y+z=0 is parallel to the line (2x-1)/2=(2-y)/2=(z+1)/a , then the value of a is

If x^(2)+y^(2)+z^(2)=1 then the maximum value of x+2y+3z is