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Computting the shortest between the foll...

Computting the shortest between the following pair of lines determine whether they intersect or not:
`vec r=-3hati+6hatj+lambda(-4hati+3hati+2hatk)` and `vec r=-2hati+7hatk+mu(-4hati+hatj+hatk)`

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The correct Answer is:
The lines do not intersect (shortest distance =9 unit)
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