The number of distinct real values of λ, for which the vectors - ^2 i + j + k, i - ^2 j + k and i + j - ^2 k are coplanar, is

JEE Advanced 2007 Mathematics question

The number of distinct real values of λ, for which the vectors , and are coplanar, is

Answer: (C)

Let . Coplanarity: . So t =

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Question ID VK-037454