What is the equation of a circle with radius r and center (0,0)?
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What is the limit of (20x^2 + 8x + 1)/(4x^2 + 5x - 2) as x approaches 2?
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Math question: What is the vertex of the parabola defined by the function 𝑦 = ax^2? Answer: The vertex of the parabola defined by the function 𝑦 = ax^2 is given by the coordinates (