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

" 13.If "A=[[3,1],[-1,2]]," show that "A^(2)-5A+71=0." 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)

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