Question

Question #9f838

Answer 1

Refer to the Explanation.

Explanation:

The Unit Vector in the direction of `vec(AB)` can definitely be

written as `1/10vec(AB).`

This is justified because of an Operation known as

The Multiplication of a Vector by a Scalar.

For Example, multiplication of `vecx=2i+3j-4k` by a scalar `-1/2`,

denoted as `-1/2(vecx), or, -1/2(2i+3j-4k)`, is another `vecy`

given by, `vecy=-1/2vecx`

`=(-1/2*2)i+(-1/2*3)j+(-1/2*-4)k`

`=-i-3/2j+2k.`