JEE Main & Advanced
JEE Main Paper Phase-I (Held on 07-1-2020 Evening)
question_answer
Let \[A=[{{a}_{ij}}]\] and \[B=[{{b}_{ij}}]\] be two \[3\times 3\] real matrices such that \[{{b}_{ij}}={{(3)}^{(i+j2)}}\,{{a}_{ji}},\]where i, j = 1, 2, 3. If the determinant of B is 81, then the determinant of A is [JEE MAIN Held on 07-01-2020 Evening]