If A=⎡⎢⎣123456710⎤⎥⎦,B=⎡⎢⎣100030045⎤⎥⎦, then T – InterviewSolution

1.	If A=⎡⎢⎣123456710⎤⎥⎦,B=⎡⎢⎣100030045⎤⎥⎦, then Tr(AB) is
Answer» If $A = ⎡ ⎢ ⎣ \begin{matrix} 1 & 2 & 3 4 & 5 & 6 7 & 1 & 0 \end{matrix} ⎤ ⎥ ⎦, B = ⎡ ⎢ ⎣ \begin{matrix} 1 & 0 & 0 0 & 3 & 0 0 & 4 & 5 \end{matrix} ⎤ ⎥ ⎦,$ then $T r (A B)$ is

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