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Mathematics
Mathematics
Problem
Let A be a
3
×
3
3 \times 3
3
×
3
matrix such that
∣
adj
(
adj
(
adj
A
)
)
∣
=
12
4
|\text{adj}(\text{adj}(\text{adj}A))| = 12^4
∣
adj
(
adj
(
adj
A
))
∣
=
1
2
4
. Then
∣
A
−
1
adj
A
∣
|A^{-1}\text{adj}A|
∣
A
−
1
adj
A
∣
is equal to : (1)
2
3
2\sqrt{3}
2
3
(2)
6
\sqrt{6}
6
(3) 12 (4) 1
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