If the lines r→=2a1→-3a2→+λb1→ and r→=a2→+μb2→ are cop – InterviewSolution

1.	If the lines r→=2a1→-3a2→+λb1→ and r→=a2→+μb2→ are coplanar and a1→ b1→ b2→=ka2→ b1→ b2→, then k =__________.
Answer» If the lines $\vec{r} = 2 \vec{a_{1}} - 3 \vec{a_{2}} + λ \vec{b_{1}} a n d \vec{r} = \vec{a_{2}} + μ \vec{b_{2}}$ are coplanar and $[\vec{a_{1}} \vec{b_{1}} \vec{b_{2}}] = k [\vec{a_{2}} \vec{b_{1}} \vec{b_{2}}]$ , then k =__________.

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