The points are and .
If the initial point is and the terminal point is , then the position vector is . \ \
Substitute the points and in above equation.
The position vector is
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=aadfa99f8d2394a6efdc637facafd9b7.png\")
and ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a1143f59b05182c1262d99225c434542.png\")
.![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=78be88fb40085904ce7e45c3f6b0d7a5.png\")
and the terminal point is ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=aa5d15fc9ee1de8a0fa31ec8499a3750.png\")
, then the position vector is ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c0cd93bc8b1b964f0c0abcb20365488e.png\")
. \ \
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=2a964458c5beca1a518c330fb26b0c81.png\")
and ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a105943b2e773b04586d56e9ae35e8aa.png\")
in above equation.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=67ef1cecc3411029ae2d4eb85f75415a.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=18cc8657d8f6275ec5bff07b62ca9e33.png\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=18cc8657d8f6275ec5bff07b62ca9e33.png\")