engineering recuitment AAI ATC Junior Executive 2025 Mock Test Series Mathematics Determinants Minors and Cofactors
Find the cofactor matrix for the matrix \(A = \left[ {\begin{array}{*{20}{c}} { - 1}&2&3\\ { - 2}&3&5\\ 4&{ - 2}&1 \end{array}} \right]\) ?
1
\(\left[ {\begin{array}{*{20}{c}} {13}&{22}&{8}\\ {8}&{ - 13}&6\\ 1&{ - 1}&1 \end{array}} \right]\)
2
\(\left[ {\begin{array}{*{20}{c}} {13}&{22}&{ - 8}\\ { - 8}&{ - 13}&6\\ 1&{ - 1}&1 \end{array}} \right]\)
3
\(\left[ {\begin{array}{*{20}{c}} {13}&{22}&{8}\\ { 8}&{13}&6\\ 1&{ 1}&1 \end{array}} \right]\)
4
None of these