1.
Let A=[aij]A = [a_{ij}] and B=[bij]B = [b_{ij}] be two 3×33 \times 3 real matrices such that bij=3(i+j2)aijb_{ij} = 3^{(i+j-2)} a_{ij}, where i,j=1,2,3i, j = 1, 2, 3. If the determinant of BB is 8181, then the determinant of AA is: