三维向量组α1,α2,α3,α4必线性相关。进一步,若m<n,则m维向量组α1,α2,，，,αn必线性相关。判断+理由 设向量组α1，α2，α3线性相关，向量组α2，α3，α4线性...
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正确。α1,α2,α3,α4组成的矩阵，是一个3×4矩阵，秩最多为3，则列必不满秩，所以列向量之间线性相关。
同理知道，α1,α2，，,αn组成m×n型矩阵，由m<n，知道秩最多为m，列必不满秩，所以列向量之间线性相关
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