Teaching MPPSC Assistant Professor Mock Test Series 2025 Physical Sciences Mathematical Methods of Physics
Which of the following matrix is a Involutory matrix.
1
\(\left[ {\begin{array}{*{20}{c}} 1&{1}&-1\\ 1&1&1\\ 1&{-1}&1 \end{array}} \right] \ \)
2
\(\left[ {\begin{array}{*{20}{c}} -4&{ - 3}&-3\\ 1&0&1\\ 4&{4}&3 \end{array}} \right] \ \)
3
\(\left[ {\begin{array}{*{20}{c}} 3&{-1}&2\\ 1&-2&1\\ -4&{1}&3 \end{array}} \right] \ \)
4
\(\left[ {\begin{array}{*{20}{c}} -2&{1}&1\\ 2&-2&3\\ 1&{1}&-2 \end{array}} \right] \ \)