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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`.

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The correct Answer is:
`4hati-9hatjsqrt(97),(4)/(sqrt(97))hati-(9)/(sqrt(97))hatj`
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