If |■(3&x@x&1)|= |■(3&2@4&1)|, then x is equal to 2 b) 4 c) 8 d) 2√2 If A is a square matrix of order 3 × 3, then |KA| is equal to K |A| b) K2 |A| c) K3 |A| d) 3K |A| The area of a triangle with vertices (K, 0), (4, 0), (0, 2) is 4 square units, then the value of K is 0 or 8 b) 0 or -8 c) 0 d) 8. ∆= |■(Ax&x^2&1@By&y^2&1@Cz&z^2&1)| and ∆1 = |■(A&B&C@x&y&z@zy&zx&xy)| then ∆1=-∆ b) ∆1≠∆ c) ∆1=∆ d) ∆1=2 ∆