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Previous Year Question (PYQs)
4
Let
$A=\begin{bmatrix}
1&0&0\\
0&\alpha&\beta\\
0&\beta&\alpha
\end{bmatrix}$
and $\;|2A|^{3}=2^{21}$ where $\alpha,\beta\in\mathbb{Z}$. Then a value of $\alpha$ is:
Solution
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