# 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) + 13x - 26#?

##### 1 Answer

Aug 9, 2015

#### Answer:

You can analize the sign of the second derivative:

#### Explanation:

Have a look:

Graphically: