Math Question: Find the derivative of f(x) = 3x^4 - 2x^3 + 5x^2 - 7x + 9.
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Question: What is the square root of 81? How does it compare to the square root of 64? Would √81 + √64 be greater than, equal to, or smaller than 13.5? Explain your reasoning.
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Math question: What is the vertex of the parabola given by the function 𝑦 = 2𝑥² + 4𝑥 - 1?