1.

The number of distinct real values of λ, for which the vectors − λ2ˆi ˆj ˆk , ˆi − λ2ˆj ˆk and ˆi ˆj − λ2ˆk acoplanar, is

A. 0
B. 1
C. 2
D. 3
Answer» D. 3


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