28. af pa() 3atci7 a t 3faufr (characteristic) agt4 et at pacx) - pa-(*) g 28. let pa(x) denote the characteristic poly- nomial of a matrix a. then for which of

28. af PA() 3ATCI7 A T 3faufr (characteristic) agT4 ET at PACx) - Pa-(*) G 28. Let Pa(x) denote the characteristic poly- nomial of a matrix A. Then for which of the following matrices, PaCx) -Pa-1) is a constant?