If is a non-zero vector of modulus and

MATHEMATICS · Single correct · CBSE · Mathematics · Vector Algebra · Vector Algebra

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 (1)

m = \pm 1

(2)

m = | \mathbf{a}|

(3)

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

(4)

m = \pm 2