12th Class
Mathematics
Sample Paper
Maths Olympiad Model Paper-6
question_answer
If the vectors \[\overrightarrow{a}=\hat{i}-\hat{j}+2\hat{k},\] \[\overrightarrow{b}=2\hat{i}+4\hat{j}+\hat{k}\] and \[\overrightarrow{c}=\lambda \hat{i}+\hat{j}+\mu \hat{k}\] are mutually orthogonal, then \[(\lambda ,\mu )\] is equal to