1. Is \(\begin{bmatrix} 2 \\ 3\\ 1\end{bmatrix}\) a linear combination of \(\begin{bmatrix} -1 \\ 0\\ 1\end{bmatrix}\) and \(\begin{bmatrix} 1 \\ 2 \\ 1 \end{bmatrix}\)?

We will have a lot more to say about questions like this in future modules.