9709 P33 - Nov 2012 - Q8
2158
Two lines have equations
\(\mathbf{r} = \begin{pmatrix} 5 \\ 1 \\ -4 \end{pmatrix} + s \begin{pmatrix} 1 \\ -1 \\ 3 \end{pmatrix}\) and \(\mathbf{r} = \begin{pmatrix} p \\ 4 \\ -2 \end{pmatrix} + t \begin{pmatrix} 2 \\ 5 \\ -4 \end{pmatrix}\),
where \(p\) is a constant. It is given that the lines intersect.
Find the value of \(p\) and determine the coordinates of the point of intersection.
