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How do you determine the values of x for which the graph of f is concave up and those on which it is concave down for $f (x) = 6 (x^{3}) - 108 (x^{2}) + 13 x - 26$ $f(x) = 6(x^3) - 108(x^2) + 13x - 26$ ?

1 Answer

Aug 9, 2015

You can analize the sign of the second derivative:

Explanation:

Have a look:
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Graphically:
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