[" The system of equations: "quad alpha x+y+z=alpha-1;quad x+alpha y+z=alpha-1;quad x+y],[" has no solution,if "alpha" is: "]

The system of equations alpha x+y+z=alpha-1 x+alpha y+z=alpha-1 x+y+alpha z=alpha-1 has no solution if alpha is(a)

The system of equations alpha x-y-z=alpha-1 , x-alpha y-z=alpha-1,x-y-alpha z=alpha-1 has no solution if alpha

The system of equations alphax+y+z=alpha-1, x+alphay+z=alpha-1 x+y+alphaz=alpha-1 and has no solution if alpha is

The system of equations alphax+y+z=alpha-1, x+alphay+z=alpha-1 x+y+alphaz=alpha-1 and has no solution if alpha is

The system of equations alphax+y+z=alpha-1, x+alphay+z=alpha-1 x+y+alphaz=alpha-1 and has no solution if alpha is

The system of equations : ax-y-z=alpha-1 x-ay-z=alpha-1 x-y-alphaz=alpha-1 has no solution if alpha is :

The system of equations alphax+y+z=alpha-1,x+alphay+z=alpha-1,x+y+alphaz=alpha-1 has no solution if alpha is

The system of equations alphax+y+z=alpha-1, x+alphay+z=alpha-1, x+y+alphaz=alpha-1 has no solution if alpha is (A) 1 (B) not -2 (C) either -2 or 1 (D) -2