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" 13.If "A=[3,1],[1,2]," show that "A^(2...

" 13.If "A=[3,1],[1,2]," show that "A^(2)-5A+7I=O" .Hence find "A^(-1)" ."

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If A = [[3,1],[-1,2]] ,show that A^2-5A + 7I=0 Hence, find A^(-1)

If A=[3112], show that A^(2)-5A+7I=0 Hence find A^(-1) .

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If A=[[3, 1],[-1, 2]] , show that A^2-5A+7I=0

If A=[(3, 1),( 1, 2)] , show that A^2-5A+5I=0 . Hence, find A^(-1) .