1) A 2) 0 3) I 4) 6A
= 20 then A(adj A) =
1) 64I 2) 88I 3) 68I 4) 98I
4. The maximum and minimum value of 3 x 3 determinant whose elements belong to {0, 1, 2, 3} is
1) ±9 2) ±17 3) ±26 4) ±54
then common difference is
1) 1 2) 2 3) 3 4) 4
6. If S is the set of distinct values of b for which the following system of linear equations x + y + z = 1, x + ay + z = 1, ax + by + z = 0 has no solution, then S is
1) an infinite set
2) a finite set containing two or more elements
3) singleton set
4) an empty set
7. If A is 3 x 3 non singular matrix such that AAT = ATA and B = A-1 AT then BBT =
1) B - 1 2) (B - 1)T 3) I 4) B + I
KEY: 1-1; 2-2; 3-3; 4-4; 5-2; 6-3; 7-3.
