Question: In Exercises determine the open intervals on which the graph is concave upward or concave downward. f(x) = x + 6x - 9x - 1

In Exercises determine the open intervals on which the graph is concave upward or concave downward.

f(x) = x + 6x - 9x - 1

f(x) = x + 6x - 9x - 1

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