GATE Civil Engineering 2017 (Set 1) Q1: Inverse Matrix Properties | Examprev

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Civil Engineering > GATE 2017 SET-1 > Mathematics

The matrix P is the inverse of a matrix Q. If I denotes the identity matrix, which one of the following options is correct?

A

PQ=I but QP≠I

B

QP=I but PQ≠I

C

PQ=I and QP=I

D

PQ−QP=I

Correct : c

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