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In an orthonormal basis, consider the vectors \(\Vect{u}\begin{pmatrix} 1 \\ 2 \\ -1 \end{pmatrix}\), \(\Vect{v}\begin{pmatrix} 0 \\ 1 \\ 2 \end{pmatrix}\), and \(\Vect{n}\begin{pmatrix} 5 \\ -2 \\ 1 \end{pmatrix}\).
Show that \(\Vect{n}\) is a normal vector to the plane defined by direction vectors \(\Vect{u}\) and \(\Vect{v}\).
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