Question: For n 0, draw n ovals in the plane so that each oval intersects each of the others in exactly two points and no

For n ≥ 0, draw n ovals in the plane so that each oval intersects each of the others in exactly two points and no three ovals are coincident. If an denotes the number of regions in the plane that results from these n ovals, find and solve a recurrence relation for an.

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