# For what values of x is #f(x)= -4x^3-x+12# concave or convex?

##### 1 Answer

Aug 23, 2017

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Concave up in the interval

Cocave down in the interval

#### Explanation:

First determine f'(x) =

The inflection point is at f"(x)=0 which gives x=0, which is a inflection point.

Thus in the interval