Consider the following in respect of the matrix \({\rm{A}} = \left( {\begin{array}{*{20}{c}} { - 1}&1\\ 1&{ - 1} \end{array}} \right):\)
1. A2 = -A
2. A3 = 4A
Which of the above is/are correct?1
1 only
2
2 only
3
Both 1 and 2
4
Neither 1 nor 2
Consider the following in respect of the matrix \({\rm{A}} = \left( {\begin{array}{*{20}{c}} { - 1}&1\\ 1&{ - 1} \end{array}} \right):\)
1. A2 = -A
2. A3 = 4A
Which of the above is/are correct?