00:01
Okay, here we're told that v, the vector v, as starting point p, ending point q.
00:07
So i can write vector v as the vector going from p to q, like that.
00:14
And this, i can write as p -o plus o -q.
00:21
Or o is the origin.
00:24
P -o -q, p -o, i can write as minus o -p plus o -q.
00:27
P -o, i can write as minus o -p plus o -q.
00:34
And that i can write a bit neater as oq minus op.
00:43
So if i know the point p and the point q, i can work out op and oq the vector pretty quickly because all that means is if q is the point 560, then oq is the vector from the origin to the point q.
01:02
And you write that in this notation...