engineering recuitment AAI ATC Junior Executive 2025 Mock Test Series Mathematics Matrices Adjoint and Inverse of a Square Matrix
If \(\rm A^{-1}=\begin{bmatrix} 1& 2& 3\\ 2& 4& 3\\ 3& 1& 6\end{bmatrix}=\frac{adj(A)}{k}\), then k = ?
1
- 25
2
- 15
3
\(\rm - \frac1{15}\)
4
None of these.