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.

If \(A = \;\left[ {\begin{array}{*{20}{c}} 2&7\\ 1&5 \end{array}} \rig

1.	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.
A.	3I
B.	5I
C.	7I
D.	None of the above
Answer» D. None of the above