CBSE Class 12-science Answered
The position vectors of A, B and C are
and
. Prove that A, B and C are collinear.
![](http://images.topperlearning.com/topper/questions/13051_image015.gif)
![](http://images.topperlearning.com/topper/questions/13051_image016.gif)
Asked by Topperlearning User | 03 Mar, 2015, 13:45: PM
Here, we have
![](https://images.topperlearning.com/topper/questions/13051_image018.gif)
Since,
, therefore
are parallel, but B is the common point in both the vectors. Thus, A, B and C are collinear.
![](https://images.topperlearning.com/topper/questions/13051_image019.gif)
![](https://images.topperlearning.com/topper/questions/13051_image020.gif)
Answered by | 03 Mar, 2015, 15:45: PM
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