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Question

$A = [2 1 - 1]$ এবং $B = [\begin{matrix} 2 \\ 0 \\ 3 \end{matrix}]$ হলে, BA = ?

$[1]$

$[\begin{matrix} 4 \\ 0 \\ - 3 \end{matrix}]$

$[4 0 - 3]$

$[\begin{matrix} 4 & 2 & - 2 \\ 0 & 0 & 0 \\ 6 & 3 & - 3 \end{matrix}]$

ANS : 4

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