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Determinantsmedium
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What is the determinant of a 3×33 \times 33×3 matrix with columns v1,v2,v3\mathbf{v}_1, \mathbf{v}_2, \mathbf{v}_3v1​,v2​,v3​ if v3=3v1\mathbf{v}_3 = 3\mathbf{v}_1v3​=3v1​?