JEE Main 7 Jan 2020 Shift 2 Solved Paper

Section: Mathematics

Question : 58 of 75

Marks: +1, -0

Let A=[aij] and B=[bij] be two 3 × 3 real matrices such that bij=(3)(i+j−2)aji, where i,j=1,2,3. If the determinant of B is 81, then the determinant of A is :

[7 Jan 2020 Shift 2]

3
1
3
1
81
1
9

Validate

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a11	3a12	32a13
3a21	3a22	3a23
32a31	32a32	32a33

a11	a12	a13
3a21	3a22	3a23
32a31	32a32	32a33