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(5 points) The vector equation r (u, v) = u cos vi + u sin vj + vk, 0 < v < 47, 0

(5 points) The vector equation r (u, v) = u cos vi + u sin vj + vk, 0 < v < 47, 0 < u < 1, describes a helicoid (spiral ramp). What is the surface area?

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