If A = 4a x 2a y + 6a z and B = 12a x +

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If A = 4a– 2ay + 6aand B = 12a+ 18a– 8az, determine:
(a) A – 3B
(b) (2A + 5B) /|B|
(c) aX A
(d) (B X a) ∙ ay

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