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Mathematics
Mathematics
Problem
In not more than two sentences, explain why the sum of two matrices
A
A
A
and
B
B
B
of the same order satisfies
A
+
B
=
B
+
A
A+B=B+A
A
+
B
=
B
+
A
whereas, in general,
A
B
≠
B
A
AB\neq BA
A
B
=
B
A
.
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