Q)
Find whether the lines \( \overrightarrow r = ( \hat i - \hat j - \hat k ) + \lambda (2\hat i + \hat j ) \: and \: \overrightarrow r = ( 2\hat i - \hat j ) + \mu ( \hat i + \hat j - \hat k )\) intersect or not. If intersecting find their point of intersection.
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