For matrix A,(A^3) = I, A^-1 is equals to _________(a) A^2(b) A^-2(c) Can’t say(d) None of the mentionedI had been asked this question at a job interview.I would like to ask this question from Inverse of Matrices in division Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics

For matrix A,(A^3) = I, A^-1 is equals to _________(a) A^2(b) A^-2(c)

1.	For matrix A,(A^3) = I, A^-1 is equals to _________(a) A^2(b) A^-2(c) Can’t say(d) None of the mentionedI had been asked this question at a job interview.I would like to ask this question from Inverse of Matrices in division Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics
Answer» Right OPTION is (a) A^2 For EXPLANATION I would SAY: A(A^2) = I this implies A^-1 = A^2.

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