If $A = \begin{pmatrix} 2 & -2 \\ -2 & 2 \end{pmatrix}$, then $A^n = 2^k A$, where $k =$ - DASH

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Question

If $A = \begin{pmatrix} 2 & -2 \\ -2 & 2 \end{pmatrix}$, then $A^n = 2^k A$, where $k =$

$2^{n-1}$

$n + 1$

$n - 1$

$2(n - 1)$

Solution

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