A) ? 1
B) ? 2
C) ? 3
D) ? 4
Correct Answer: D
Solution :
If the given vectors are coplanar, then their scalar triple product is zero. \[\left| \begin{matrix} 2 & -1 & 1 \\ 1 & 2 & -3 \\ 3 & \lambda & 5 \\ \end{matrix} \right|=0\Rightarrow \lambda =-4.\]You need to login to perform this action.
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