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Questions  >>  JEEMAIN and NEET  >>  Mathematics  >>  Class12  >>  Determinants
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If $A$ is an $3\times 3$ non-singular matrix such that $A A' = A' A$ and $B = A^{-1} A'$, then $B B'$ equals

$\begin{array}{1 1} I+B \\ I \\ B^{-1} \\ (B^{-1} ) \end{array}$

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