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Mathematics
Mathematics
Problem
Consider the matrices
A
=
[
1
0
2
0
1
0
3
0
1
]
A = \begin{bmatrix}1&0&2\\0&1&0\\3&0&1\end{bmatrix}
A
=
1
0
3
0
1
0
2
0
1
and
B
=
[
0
2
0
1
0
0
0
0
1
]
B = \begin{bmatrix}0&2&0\\1&0&0\\0&0&1\end{bmatrix}
B
=
0
1
0
2
0
0
0
0
1
. What is the
(
2
,
3
)
(2,3)
(
2
,
3
)
entry of the matrix
A
B
−
B
A
AB - BA
A
B
−
B
A
? a)
2
2
2
b)
0
0
0
c)
−
2
-2
−
2
d)
6
6
6
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