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Mathematics
Mathematics
Problem
Let
A
A
A
be a
3
×
3
3\times 3
3
×
3
matrix such that
∣
A
∣
=
0
|A|=0
∣
A
∣
=
0
but
adj
A
≠
0
\text{adj}\,A\neq 0
adj
A
=
0
. What is the rank of
A
A
A
? a)
1
1
1
b)
3
3
3
c)
2
2
2
d)
0
0
0
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