Question: 28. Let A be an *m x n* matrix and let P be any *n x k* matrix of rank *n*. Show that P'A' is

28. Let A be an *m x n* matrix and let P be any *n x k* matrix of rank *n*. Show that P'A' is a c-inverse of AP, where A' and P' are any c-inverses of A and P, respectively.

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