Adjoint and Inverse of a Matrix With Their Relation, Properties, Examples

SOLVED: Question 1. (5 points Give examples of matrices A and B such that(a) A B is not invertible; although A and B are invertible (6) A B is invertible, although A and B are not invertible.(c) all of A,B, and A B are invertible(d) How many 2 by 2 matrices are there whose entries are ls and Os?(e) Suppose 3 of the 4 entries in a 2 by 2 matrix are ls and the fourth entry is 0 Is this matrix invertible?

How to Determine if a Matrix is invertible | Precalculus | Study.com

Singular Matrix | Definition, Properties & Example