Find the position vector of the mid point of the vector joining the points P(2, 3, 4) and Q(4, 1, –2).
So, 
and 
Let 
be the mid point of 
.
17
Find the position vector of the mid point of the vector joining the points P(2, 3, 4) and Q(4, 1, –2).
So, and
Let be the mid point of .