Mathematics

Problem

\mathbf{a}

is a non-zero vector of modulus

a

and

m

, is a non-zero scalar, then

m \mathbf{a}

is a unit vector, if a.

m = \pm 1

m = | \mathbf{a}|

m = \frac{1}{| \mathbf{a}|}

m = \pm 2