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    Vector Proofs : Cross Products and Dot Products

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    15. (a) Use a counterexample to show that (A x B) x C is not necesarilly equal to A x (B x C)
    (b) Prove that A x (B x C) = (A.C)B ? (A. B)C. Can von give a geometric interpretation of this equation?

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    Solution Summary

    A vector proof involving cross-produts and dot.products is provided. The solution is detailed and well presented. The response received a rating of "5/5" from the student who originally posted the question.