Question

the head of the vector is at coordinate (3,4,5) and its tail is at(2,-1,1) write the vector

Answer 1

Here it is. We can see here we need to subtract only

Answer 2

The vector can be simply obtained by adding up the coordinates and putting quantities i, j, and k with the x- axis, y-axis, and z-axis respectively.

In the following question we can find the vector by simply adding the head and tail quantities of various axes separately.  

The answer is, 5i+3j+6k.