Q. 1 B5.0( 1 Vote )
Show that the points whose position vectors are as given below are collinear :
and 
Answer :
Let us assume points to be A, B and C such that
Then, we need to find 
and 
.
And
Now, we need to draw a relation between 
and 
.
We know that,
Or 
Or 
This relation shows that 
and 
are parallel to each other.
But since, B is the common point in AB and BC.
⇒ AB and BC actually lies on a straight line.
Thus, A, B and C are collinear.
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