defence exam ITBP (Telecommunication) Head Constable Mock Test 2024 Mathematics Matrices Operations on Matrices
If \(A = \left[ {\begin{array}{*{20}{c}} 1&{ - 1}\\ { - 1}&1 \end{array}} \right],\) then the expression A3 - 2A2 is
1
a null matrix
2
an identify matrix
3
equal to A
4
equal to -A