Elementor #1171

$vec{x} = begin{pmatrix}1\2\3\4end{pmatrix}$
Wird zu
${lvert}vec{u}rvert = sqrt{(2/5)^2 + (1/5)^2 + (-2/5)^2 + (4/5)^2} = 1$
$[m=frac{Delta y}{Delta x}=frac{y_2-y_1}{x_2-x_1}=frac{5-1}{3-1}=frac{4}{2}=2]$