engineering recuitment AAI ATC Junior Executive 2025 Mock Test Series Mathematics Matrices Adjoint and Inverse of a Square Matrix
Let \(A = \left[ {\begin{array}{*{20}{c}} x&3&2\\ 1&y&4\\ 2&2&z \end{array}} \right]\),xyz = 60 and 8x + 4y + 3z = 20. If A(adj A) = kI, then k is equal to
1
36
2
64
3
68
4
88