Answer: 16.
- A 4
- B 8
- C 16
- D 32
Correct answer: C. 16
Explanation: det(adj(adj A)) = det(A)^((n−1)²) = 2<sup>4</sup> = 16 for n = 3.
Concept context
Evaluation of determinants, cofactors, adjoint, inverse of matrix, Cramer's rule and area applications. Always in board and JEE.