What are the characteristics of an ellipse function given by the equation (x-h)^2/a^2 + (y-k)^2/b^2 = 1, where (h,k) represents the center coordinates and a and b represent the semi-major and semi-minor axis lengths, respectively?
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Math Question: What is the value of f(3) in the linear function f(x)=x?
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What is the limit of (x^2 - 4) / (x + 2) as x approaches -2?