A、A的列向量组线性无关
B、方程组A<ruby>X<rp>(</rp><rt style="font-size:7px;layout-grid-mode:line">→</rt><rp>)</rp></ruby>＝<ruby>b<rp>(</rp><rt style="font-size:7px;layout-grid-mode:line">→</rt><rp>)</rp></ruby>有无穷多解
C、方程组A<ruby>X<rp>(</rp><rt style="font-size:7px;layout-grid-mode:line">→</rt><rp>)</rp></ruby>＝<ruby>b<rp>(</rp><rt style="font-size:7px;layout-grid-mode:line">→</rt><rp>)</rp></ruby>的增广矩阵<ruby>A<rp>(</rp><rt style="font-size:8px;layout-grid-mode:line">＿</rt><rp>)</rp></ruby>的任意四个列向量构成的向量组线性无关
D、A的任意4个列向量构成的向量组线性无关