Vactors 12
posted by Shaila .
Let A and B be any two points on the plane and O be the origin. Prove that vector AB = vector OB  vector OA.
Let x be any other point on the plane prove that vector AB = vector xB  vector xA.

Since you are doing "vectors" here are some tutorials that may help you:
http://search.yahoo.com/search?fr=mcafee&p=vector+tutoial
Sra