Question

This is from a unit about vectors. Given the points A (4,2,-1), B (2,1,5), C (9,4,1): Find the equation of (AC).

Answer 1

First, get rid of the useless information. We don't care about point B.

Answer 2

To find AC, you just have to use component-wise addition/subtraction.

C (9,4,1)
A (4,2,-1)

<(9-4),(4-2),(1-(-1))>=<5,2,2>

Answer 3

so it is talking about vector AC even though it doesn't have the little arrow above AC? Because in the questions before it referred to vectors with the arrow about it