જો $A = \begin{bmatrix} 5 & 5\alpha & \alpha \\ 0 & \alpha & 5\alpha \\ 0 & 0 & 5 \end{bmatrix}$ અને $\operatorname{det}(A^2) = 25$ હોય, તો $|\alpha| = $

  • A
    $5$
  • B
    $5^2$
  • C
    $1$
  • D
    $\frac{1}{5}$

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