... ca DABC. a) 1 230 371250ABC(;;),(;;),(;;)- b) 0 132 111 231 71019ABC(;;),(;;),(;;)- c) 34 7 532 1 23 ABC(;;),(;;),(;;) d) 4 232 1 138 7ABC(;;),(;;),(;;) e) 31 21211 13 ABC(;;),(;;),(;;) ... akbkR()=Îrr 11 31 2221 23 1 23 33 0akbaaaakbbbbbbbakb,(,,)ì=ïÛ=Û==¹íï=î · 112 233 abababab =++rr · 112 233 0abababab^Û++=rr · 22221 23 aaaa=++r · 222122aaaa=++r ... hng ca hai vect: (Chng trỡnh nõng cao) a) nh ngha: Cho 1 23 aaaa(,,)=r, 1 23 bbbb(,,)=r. [ ]( ) 233 112 233 231 131 221 233 112aaaaaaababababababababbbbbbb,;;;;ổử==ỗữ= ỗữốứrrrr...