12th Class
Mathematics
Sample Paper
Mathematics Olympiad - Sample Paper-5
question_answer
If the vectors, \[\mathbf{\vec{a}}=\mathbf{2\hat{i}}-\mathbf{3\hat{J}}+\mathbf{4\hat{k}},\mathbf{\hat{b}}=\mathbf{\hat{i}}+\mathbf{2\hat{J}}-\mathbf{\hat{k}}\]and \[\mathbf{\vec{c}}=\mathbf{x\hat{i}}-\mathbf{\hat{j}}+\mathbf{2\hat{k}}\] are coplanar, then x=