Mathematics

Problem

For a non-zero vector

\mathbf{p}

, which expression gives a unit vector opposite in direction to

\mathbf{p}

? a)

-\dfrac{\mathbf{p}}{|\mathbf{p}|^{2}}

\dfrac{\mathbf{p}}{|\mathbf{p}|}

-\dfrac{\mathbf{p}}{|\mathbf{p}|}

-\mathbf{p}