qqp question1: How do I solve the problem: [math] A=\begin{pmatrix} -2 &4 \\   -5& 7 \end{pmatrix}, A^{n}=? [/math]? question2: Given [math]A[/math], What is the general formula of [math]A^n[/math]? If [math]A=\begin{pmatrix} -2 &4 \\ -5& 7 \end{pmatrix}[/math], what is the [math]A^n[/math]?