Let a=2 i+ j+ k, b= i+2 j- k, and vector c be coplanar. If c is perpendicular to a, then c is

MHT CET 2025 Mathematics question

Let , and vector be coplanar. If is perpendicular to , then is

Answer: (D)

" coplanar" means , and "" means . Compute . Test each option: (A) $

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Question ID VK-102599