A unit vector coplanar with i + j + k and 2 i + j + k and perpendicular to i + j - k is

MHT CET 2024 Mathematics question

A unit vector coplanar with and and perpendicular to is

Answer: (A)

A vector coplanar with and is , and perpendicularity to fixes the ratio . With the printed vectors and we get

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Question ID VK-094919