(1) 2 0 3-|||-设向量组a1= -1 α2= 4 a3= -6 α4= 3-|||-3 1 5 4 则该向量组的一个最大无关-|||-2 -3 7 -1-|||-组为α1,α2,且 (alpha )_(3)=2(alpha )_(1)-(alpha )_(2), (alpha )_(4)=(alpha )_(1)+(alpha )_(2)-|||-A 对-|||-B)错