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JEEMAIN and NEET
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Mathematics
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Class12
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Matrices
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Let $A=\begin{vmatrix}5 &5\alpha&\alpha\\0&\alpha&5\alpha\\0&0&5\end{vmatrix}$ if $\mid A^2\mid=25$ then $\alpha$ equals
$(a)\;\large\frac{1}{5}$$\qquad(b)\;5\qquad(c)\;5^2\qquad(d)\;1$
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