determine the open intervals on which the graph of the function is concave upward or concave downward. g(x) = 27x^2 - x^3 Concave upward: ? Concave downward: ?

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A: Answer: The solution is as given below:

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A: Please see the below picture for detailed solution.

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A: The given function is;  y=1/(9x+1)5.

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Q: lim x → 5 (2x² - 4x + 7)

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Q: Suppose that f is a function such that lim-[f(x) - 2x²]= π. Determine, if possible, lim 118 x² +1'

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A: We can solve this as follows:

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