Let →a=^i+2^j+4^k, →b=^i+λ^j+4^k and →c=2^i+4^j+(λ2−1)^k be – InterviewSolution

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1.	Let →a=^i+2^j+4^k, →b=^i+λ^j+4^k and →c=2^i+4^j+(λ2−1)^k be coplanar vectors. Then the non-zero vector →a×→c is :
Answer» Let $\to a =^i + 2^j + 4^k, \to b =^i + λ^j + 4^k$ and $\to c = 2^i + 4^j + (λ^{2} - 1)^k$ be coplanar vectors. Then the non-zero vector $\to a \times \to c$ is :

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