If A= [ lll 1 & 2 & 3 ], B= [ l 3 2 1 ] then find AB and BA. - Vidyadip

Question

If $A=\left[\begin{array}{lll}1 & 2 & 3\end{array}\right], B=\left[\begin{array}{l}3 \\ 2 \\ 1\end{array}\right]$ then find $AB$ and $BA$.

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