The shortest distance between the lines \[\mathbf{r}=(3\mathbf{i}-2\mathbf{j}-2\mathbf{k})+\mathbf{i}t\] and \[\mathbf{r}=\mathbf{i}-\mathbf{j}+2\mathbf{k}+\mathbf{j}s\] (t and s being parameters) is [AMU 1999]

The shortest distance between the lines \[\mathbf{r}=(3\mathbf{i}-2\ma

1.	The shortest distance between the lines \[\mathbf{r}=(3\mathbf{i}-2\mathbf{j}-2\mathbf{k})+\mathbf{i}t\] and \[\mathbf{r}=\mathbf{i}-\mathbf{j}+2\mathbf{k}+\mathbf{j}s\] (t and s being parameters) is [AMU 1999]
A.	\[\sqrt{21}\]
B.	\[\sqrt{102}\]
C.	4
D.	3
Answer» D. 3

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The shortest distance between the lines \[\mathbf{r}=(3\mathbf{i}-2\mathbf{j}-2\mathbf{k})+\mathbf{i}t\] and \[\mathbf{r}=\mathbf{i}-\mathbf{j}+2\mathbf{k}+\mathbf{j}s\] (t and s being parameters) is [AMU 1999]

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