# If A is a matrix of order $3\times 3$,then $(A^2)^{-1}$=_____________.

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• If a non-singular matrix of order n, then $(A^n)^{-1}=(A^{-1})^n$
If A is a matrix of order $3\times 3$,then $(A^2)^{-1}=(A^{-1})^2$

edited Apr 4, 2013