Suppose that $A$ is a $1 \times n$ matrix and $B$ is a $n \times 1$ matrix.
(a) Can $A B$ be found? If so, give the dimensions of the resulting matrix.
(b) Can $B A$ be found? If so, give the dimensions of the resulting matrix.
(c) Does $A B=B A$ ? Explain why or why not.
(d) If $C$ and $D$ are each square matrices, will $C D$ always exist?

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The Answer of Suppose that $A$ is a $1 \times n$ matrix and $B$ is a $n \times 1$ matrix.
(a) Can $A B$ be found? If so, give the dimensions of the resulting matrix.
(b) Can $B A$ be found? If so, give the dimensions of the resulting matrix.
(c) Does $A B=B A$ ? Explain why or why not.
(d) If $C$ and $D$ are each square matrices, will $C D$ always exist?

Suppose That AAA Is A 1×n1 \times n1×n Matrix And BBB Is A n×1n \times 1n×1

Suppose That $A$ Is A $1 \times n$ Matrix And $B$ Is A $n \times 1$