Exercise 8

Intersect each pair, if possible.

• $\{\hskip 1.00006pt\begin{pmatrix}1\\ 1\\ 2\end{pmatrix}+t\begin{pmatrix}0\\ 1\\ 1\end{pmatrix}\mid t\in\mathbb{R}\hskip 1.00006pt\}$,  $\{\hskip 1.00006pt\begin{pmatrix}1\\ 3\\ -2\end{pmatrix}+s\begin{pmatrix}0\\ 1\\ 2\end{pmatrix}\mid s\in\mathbb{R}\hskip 1.00006pt\}$

• $\{\hskip 1.00006pt\begin{pmatrix}2\\ 0\\ 1\end{pmatrix}+t\begin{pmatrix}1\\ 1\\ -1\end{pmatrix}\mid t\in\mathbb{R}\hskip 1.00006pt\}$,  $\{\hskip 1.00006pts\begin{pmatrix}0\\ 1\\ 2\end{pmatrix}+w\begin{pmatrix}0\\ 4\\ 1\end{pmatrix}\mid s,w\in\mathbb{R}\hskip 1.00006pt\}$