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I really need help with this asap please. 6. If 7, 7, and k are the standard unit basic vectors in 3-space, determine the value

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I really need help with this asap please.

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6. If 7, 7, and k are the standard unit basic vectors in 3-space, determine the value of k . (7 - 3 k) + (i- 4k) . (i -4k)-87x-k|. (Simplify without using components). (3 marks) 7. Find the torque produced by a cyclist exerting a force of F = [70,30,160]N on the shaft- pedal d = [12,15,11]cm long. torque = Fxd (4 marks)

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