If a , b and c are coplanar, then what is (2 a 3 b ) 4 c +(5 b 3 c ) 6 a equal to?

NDA 2021 Mathematics question

If , and are coplanar, then what is equal to?

Answer: (C)

Scalars can be taken out of a scalar triple product: and (cyclic order). The

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Question ID VK-033565