What is the value of f(x) when f(x) = c for any x? (
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Question: Find the derivative of the function f(x) = ∫[0, x^2] (2t + 1) dt.
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What is the equation of an ellipse with a major axis parallel to the x-axis, a center at (h, k), semi-major axis of length a, and semi-minor axis of length b?