engineering recuitment AAI JE Technical Mock Test 2020-21 Engineering Mathematics Linear Algebra Matrix Algebra
If \(A = \left[ {\begin{array}{*{20}{c}} 1&1\\ { - 1}&1 \end{array}} \right]\) and A4 = kI, where I is identity matrix
What is value of k?1
2
2
-2
3
4
4
-4