Q. 74.8( 4 Votes )

Show that the vec

Answer :

Let us understand that, two more points are said to be collinear if they all lie on a single straight line.

We have been given position vectors and .


Let




Also, let O be the initial point having position vector as



Now, let us find and .


is given by





is given by





We have as






[, ]


Thus, this relation shows that and are parallel to each other.


But also, is the common vector in and .


and are not parallel but lies on a straight line.


A and B are collinear.


Hence, and are collinear.


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