Find the point of diminishing returns (x,y) for the function R(x), where R(x) represents revenue (in thousands of dollars) and x represents the amount spent on advertising (in thousands of dollars). R(x) = 10,000 -x³ + 33x² + 700x, 0≤x≤ 20 The point of diminishing returns is (Type an ordered pair.)

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A: Solving for x

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A:

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A:

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A:

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