Mathematics, 23.01.2021 08:10 dorothybean

Given matrices S and T below, which statement is true? Matrices S and T are not inverses of each other because S+T I.
Matrices S and T are inverses of each other because ST = TS = I.
Matrices S and T are inverses of each other because the determinant of S is 1.
Matrices S and T are not inverses of each other because the determinant of S equals the determinant of T.

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