a) obtained by rotating the curve Sketch and find the area of the surface y =/2x + 3 for x E [2,4]. Is there another curve that gives the same area? Explain. b) ts) Determine whether the geometric series (-1)"-14" -1 Σ. n=1 5" is convergent or divergent, and find its sum if it is convergent. Find also the partial sum Sm and its limit as m → o. Discuss your findings

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