જો $A = \begin{bmatrix} \alpha & 2 \\ 2 & \alpha \end{bmatrix}$ અને $|A^3| = 27$ હોય,તો $\alpha = $

  • A
    $\pm 1$
  • B
    $\pm 2$
  • C
    $\pm \sqrt{7}$
  • D
    $\pm \sqrt{5}$

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જો $A = \begin{bmatrix} \alpha & 2 \\ 2 & \alpha \end{bmatrix}$ અને $|A^3| = 125$ હોય,તો $\alpha = $

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