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Vectors & Spaceshard
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What is the nullity of the 3×33 \times 33×3 matrix A=(101010101)A = \begin{pmatrix} 1 & 0 & 1 \\ 0 & 1 & 0 \\ 1 & 0 & 1 \end{pmatrix}A=​101​010​101​​?