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Problem
Problem
Let
A
=
[
a
i
j
]
3
×
3
A = [a_{ij}]_{3 \times 3}
A
=
[
a
ij
]
3
×
3
be such that
a
i
j
=
{
3
;
when
i
=
j
0
;
i
≠
j
a_{ij} = \begin{cases} 3; & \text{when } i = j \\ 0; & i \neq j \end{cases}
a
ij
=
{
3
;
0
;
when
i
=
j
i
=
j
, then
{
det
(
adj
(
adj
A
)
)
5
}
\left\{ \frac{\det(\text{adj}(\text{adj } A))}{5} \right\}
{
5
d
e
t
(
adj
(
adj
A
))
}
equals : (where
{
⋅
}
\{ \cdot \}
{
⋅
}
denotes fractional part function) (a)
2
5
\frac{2}{5}
5
2
(b)
1
5
\frac{1}{5}
5
1
(c)
2
3
\frac{2}{3}
3
2
(d)
1
3
\frac{1}{3}
3
1
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