NCERT Exercise 4.4 Q16 - Determinants
Question: If A=[[2,-1,-1],[-1,2,-1],[-1,-1,2]], verify A^3-6A^2+9A-4I=O and hence find A^{-1}.
Answer: A^{-1}=(1/4)[[3,1,1],[1,3,1],[1,1,3]].
Full step-by-step NCERT solution with diagrams on Something by Zero.
Question: If A=[[2,-1,-1],[-1,2,-1],[-1,-1,2]], verify A^3-6A^2+9A-4I=O and hence find A^{-1}.
Answer: A^{-1}=(1/4)[[3,1,1],[1,3,1],[1,1,3]].
Full step-by-step NCERT solution with diagrams on Something by Zero.