JEE Main & Advanced
Sample Paper
JEE Main - Mock Test - 30
question_answer
The number of distinct real values of X, for which the vectors \[-{{\lambda }^{2}}\hat{i}+\hat{j}+\hat{k},\hat{i}-{{\lambda }^{2}}\hat{j}+\hat{k}\]and \[\hat{i}+\hat{j}-{{\lambda }^{2}}\hat{k}\]are coplanar, is