12) let n 21and a, er with a 5. suppose aa(g. 5) = lal is an nxn matrix s.t. a a anda for i j, 1s,jsn. let d, be the det an(a, b). which of the following are tr

12) Let n 21and a, ER with a 5. Suppose Aa(G. 5) = lal IS an nxn matrix s.t. a a anda for i j, 1S,jsn. Let D, be the det An(a, B). Which of the following are true? a) Da(a-)D»-1 + ffor n 22 b) (- +p tor n 2 )D.(a+(n -1)8)"(a-B) for n22 d) D= (a +(n-1))(a-B) for n22