# Is #f(x)=-2x^5-2x^4+5x-45# concave or convex at #x=-2#?

##### 1 Answer

Nov 19, 2015

#### Answer:

A function (or its graph) can be said to be concave or convex on an interval. This function is convex near

#### Explanation:

A necessary and sufficient condition for

In this case,

So,

(If you have been given a definition of