If P(-1,2) and Q(3,-7) are two points, e...

If P(-1,2) and Q(3,-7) are two points, express the vector PQ in terms of unit vectors `hati and hatj` also, find distance between point P and Q. What is the unit vector in the direction off PQ?

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The correct Answer is:

`4hati-9hatjsqrt(97),(4)/(sqrt(97))hati-(9)/(sqrt(97))hatj`

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