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Problem
Problem
Let
M
=
[
a
i
j
]
3
×
3
M = [a_{ij}]_{3 \times 3}
M
=
[
a
ij
]
3
×
3
where
a
i
j
∈
{
−
1
,
1
}
a_{ij} \in \{-1, 1\}
a
ij
∈
{
−
1
,
1
}
. Find the maximum possible value of
det
(
M
)
\det(M)
det
(
M
)
. (a) 3 (b) 4 (c) 5 (d) 6
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