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Null matrix
Identity matrix
Transpose of a matrix
When the rows and columns are swapped
(AB)^T
=B^T A^T
No inverse
Determine = 0
Singular
Determine = 0
Non singular
Determine doesn’t = 0
P and Q are non singular matrices. Prove that (PQ)^-1= Q^-1 P^-1
Let X =(PQ)^-1
If asked to prove a matrix is self inverse..
You must prove that A=A^-1