If a, b, c > 0 and x, y, z E R, then the `determinant (a +a*)2 (a -ax)2 1 (b + b-y)2 (b b-y)2 1 (c2 + c2)2 (c+c2)2 1` x12 al roots of = 0, is is dependent on a. a, b, c only c. a, b, c, x, y, z b. x, y, z only d. None of these (-9: Let x < 1? then value of x2 +2 2x +1 1