Hallo jd,
du hast selbst
\(\begin{pmatrix} x_1 \\ x_2 \\ x_3 \end{pmatrix}\) = \(\begin{pmatrix} -1/7 t \\ -7 - 13/7 t \\ t \end{pmatrix}\)
= \(\begin{pmatrix} 0 \\ -7 \\ 0 \end{pmatrix}\) + t • \(\begin{pmatrix} -1/7 \\ -13/7 \\ 1 \end{pmatrix}\)
= \(\begin{pmatrix} 0 \\ -7 \\ 0 \end{pmatrix}\) + t • 1/7 • \(\begin{pmatrix} -1 \\ 13 \\ 7 \end{pmatrix}\)
= \(\begin{pmatrix} 0 \\ -7 \\ 0 \end{pmatrix}\) + r • \(\begin{pmatrix} -1 \\ 13 \\ 7 \end{pmatrix}\)
Gruß Wolfgang