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Mathematics
Problem
Matrix
A
A
A
has order
m
×
6
m \times 6
m
×
6
and
I
I
I
is an identity matrix such that
A
I
=
A
AI = A
A
I
=
A
. What is the order of
I
I
I
? a)
m
×
m
m \times m
m
×
m
b)
6
×
m
6 \times m
6
×
m
c)
6
×
6
6 \times 6
6
×
6
d)
m
×
6
m \times 6
m
×
6
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