For a matrix A, B and identity matrix I, if a matrix AB=I=BA then?(a) B is inverse of A(b) A is inverse of B(c) A^-1 = B, B^-1 = A(d) All of the mentionedThe question was asked during an interview.I'd like to ask this question from Inverse of Matrices topic in portion Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics

For a matrix A, B and identity matrix I, if a matrix AB=I=BA then?(a)

1.	For a matrix A, B and identity matrix I, if a matrix AB=I=BA then?(a) B is inverse of A(b) A is inverse of B(c) A^-1 = B, B^-1 = A(d) All of the mentionedThe question was asked during an interview.I'd like to ask this question from Inverse of Matrices topic in portion Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics
Answer» RIGHT OPTION is (d) All of the mentioned Easy EXPLANATION: Since AB = I, A = B^-1 Similarly A is the inverse of B.

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