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m -1 m-2) . Given two 3 matrices A= 1 -11 2-n and E- 1 , calculate |A| and |A+ El. Find the 2

m -1 m-2) . Given two 3 matrices A= 1 -11 2-n and E- 1 , calculate |A| and |A+ El. Find the 2 -1 0 1 1 values of m and n such that A+ E has an inverse. [15 marks]

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