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ConceptScalar Triple Product of Vectors

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#### Question

Prove that, for any three vector `veca,vecb,vecc [vec a+vec b,vec b+vec c,vecc+veca]=2[veca vecb vecc]`

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#### Reference Material

Solution for concept: Scalar Triple Product of Vectors. For the courses 12th CBSE (Arts), 12th CBSE (Commerce), 12th CBSE (Science)