A) \[-14\]
B) \[7\]
C) \[14\]
D) \[\frac{1}{7}\]
E) \[\frac{1}{14}\]
Correct Answer: C
Solution :
Since the given vectors are perpendicular \[\therefore \]\[(3\hat{i}+\lambda \hat{j}+\hat{k}).(2\hat{i}-\hat{j}+8\hat{k})=0\] \[\Rightarrow \] \[6-\lambda +8=0\] \[\Rightarrow \] \[\lambda =14\]You need to login to perform this action.
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