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Let u = [2,−3, 1] and v = [0, 1, 4]. Calculate the vector u − v. Place u and v tail-totail to form two sides of a triangle. With regard to this triangle, what does u−v represent?
Calculate the number u•u and discuss its relevance to the diagram you have drawn. Do the same for the number
(u − v) • (u − v).

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