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Matrices And Determinants

AP EAPCET 2024 - 21th May Evening Shift

MCQ+1 / -02024
If $3 A=\left[\begin{array}{ccc}1 & 2 & 2 \\ 2 & 1 & -2 \\ a & 2 & b\end{array}\right]$ and $A A^T=I$, then $\frac{a}{b}+\frac{b}{a}=$

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