NCERT Exercise 4.4 Q15 - Determinants

Question: For A=[[1,1,1],[1,2,-3],[2,-1,3]], show A^3-6A^2+5A+11I=O and hence find A^{-1}.

Answer: A^{-1}=(-1/11)[[-3,4,-5],[-9,-1,4],[5,-3,-1]].

Full step-by-step NCERT solution with diagrams on Something by Zero.

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