Question

If a, b and c are even natural numbers, then  Δ = |(a - 1, a, a + 1), (b - 1, b, b + 1), (c - 1, c, c + 1)| is equal to

(A) a + b + c

(B) a² + b² + c²

(C) abc

(D) None of these

Answer 1

Answer is (D) None of these

By applying C₁ → C₁ + C₂ + C₃, we get Δ = 0.