How do you find the local extrema for #f(x)= x^4-4x³#?
1 Answer
Jun 28, 2016
There is a minimum for
Explanation:
First of all we search the zeros of the derivative.
One solution is of course
To see which kind of points are
and we have
Then when
We can see this also from the plot.
graph{x^4-4x^3 [-52.9, 61.54, -29.3, 27.9]}