# How do you find all local maximum and minimum points given #y=3x^4-4x^3#?

##### 1 Answer

Jan 3, 2017

#### Explanation:

First we find the critical values for

Now we calculate the second derivative:

So we have

Instaed we have

graph{3x^4-4x^3 [-2.813, 2.812, -1.406, 1.407]}