Question
यदि $A =\left[\begin{array}{ll}\alpha & 0 \\ 1 & 1\end{array}\right] B =\left[\begin{array}{ll}1 & 0 \\ 5 & 1\end{array}\right]$, जह्ँ $A ^2= B$, तो $\alpha$ का मान है :

Answer

(D)

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