Question: 72. Let A be an m x n matrix. Show that A -1 = A'(AA')A(A'A)A', where (A'A) -1 and (AA') -1 are any c-inverses of

72. Let A be an m x n matrix. Show that A-1 = A'(AA')A(A'A)A', where (A'A)-1

and (AA')-1 are any c-inverses of the respective matrices.

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