# For what values of x is #f(x)=4x^5-5x^4# concave or convex?

##### 1 Answer

The answer is

#### Explanation:

We calculate the first derivative and we build a sign chart

The critical points are when

Now we construct the sign chart

Therefore,

Jan 29, 2017

The answer is

We calculate the first derivative and we build a sign chart

The critical points are when

Now we construct the sign chart

Therefore,