A.若對(duì)任意一組不全為零的數(shù)k1,···,ks,都有k1α1+k2α2+···+ksαs≠0,則α1,α2,···,αs線性無關(guān)
B.若α1,α2,···,αs線性相關(guān),則對(duì)于任意一組不全為零的數(shù)k1,k2,···,ks,有k1α1+k2α2+···+ksαs=0
C.α1,α2,···,αs線性無關(guān)的充要條件是此向量組的秩為s
D.α1,α2,···,αs線性無關(guān)的必要條件是其中任意兩個(gè)向量線性無關(guān)