Teaching HTET PGT Level 3 - 2024 Mock Test Mathematics Matrices Adjoint and Inverse of a Square Matrix
If \(A = \;\left[ {\begin{array}{*{20}{c}} 2&7\\ 1&5 \end{array}} \right]\) then what is A + 3A-1 equal to?
Where A is the matrix of order 2.
1
3I
2
5I
3
7I
4
None of the above