Question 1302e

Vectors II: Lines and Planes

Foot of Perpendicular and Reflection in Lines

Question

The line

{l}

is given by

l: \mathbf{r} = \begin{pmatrix} - 5 \\ 1 \\ 4 \end{pmatrix} + \lambda \begin{pmatrix} 1 \\ 2 \\ 1 \end{pmatrix}, \; \lambda \in \mathbb{R}.

Find the coordinates of the point,

{B',}

obtained when the point

{B \left( - 2, 1, - 5 \right)}

is reflected in the line

{l.}

{B'}

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