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Problem
Problem
If
A
=
[
−
1
1
1
1
−
1
1
1
1
−
1
]
A = \begin{bmatrix} -1 & 1 & 1 \\ 1 & -1 & 1 \\ 1 & 1 & -1 \end{bmatrix}
A
=
−
1
1
1
1
−
1
1
1
1
−
1
, find the values of a.
(
i
)
∣
A
∣
adj
A
(i) \quad |A| \text{adj } A
(
i
)
∣
A
∣
adj
A
b.
(
i
i
)
∣
(
adj
(
3
A
)
)
∣
(ii) \quad |(\text{adj } (3A))|
(
ii
)
∣
(
adj
(
3
A
))
∣
c.
(
i
i
i
)
∣
(
adj
(
adj
(
adj
A
)
)
)
∣
(iii) \quad |(\text{adj } (\text{adj } (\text{adj } A)))|
(
iii
)
∣
(
adj
(
adj
(
adj
A
)))
∣
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