6. In the vector space R³ the argument needed to determine if the set of vectors \left\{\left(\begin{array}{l}

2 \\

3 \\

1

\end{array}\right),\left(\begin{array}{c}

-1 \\

6 \\

3

\end{array}\right)\right\} is linearly independent leads to a homogeneous system of linear equations in the form Ax = 0, where A =