Civil Engineering > GATE 2022 SET-2 > Linear Algebra
P and Q are two square matrices of the same order. Which of the following statement(s) is/are correct?
A
If P and Q are invertible, then [PQ]-1=Q-1P-1
B
If P and Q are invertible, then [QP]-1=P-1Q-1
C
[PQ]-1=P-1Q-1.
If P and Q are invertible, then
D
If P and Q are not invertible, then [PQ]-1=Q-1P-1.

Correct : a;b

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