What are the characteristics of the ellipse function with the equation (x-h)^2/a^2 + (y-k)^2/b^2 = 1, where (h,k) is the center, a is the semi-major axis length, and b is the semi-minor axis length?
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Question: What is the median of the set {3, 6, 9, 12, 15, 18}?
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What is the limit as x approaches infinity of [(3x^2 + 2x) / (5x^2 + x)] ?