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Find the distance between the points A(3...

Find the distance between the points A(3,2,1), B(-1,2,-3).

Text Solution

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`vec(AB)=(-hati+hatj-3hatk)-(3hati+2hatj+hatk)`
`=(-4hati-4hatk)`
`:. AB=|vecAB|=sqrt((-4)^(2)+(-4)^(2))=4sqrt(2)`.
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