engineering recuitment BARC Stipendiary Trainee Category II 2023 Mock Test Mathematics Matrices Adjoint and Inverse of a Square Matrix
If A is a square matrix of order 2 with |A| ≠ 0, then which one of the following is correct?
1
|adj A| = |A|
2
|adj A| = |A|2
3
|adjA| = |A|3
4
|adjA|2 = |A|