Calculus Derivative Question

Question

Let f(x) = x^4 − 4x

(a) Find the x values of all local maxima and minima using the second derivative test.

(b) Find the x values of the inflection points. Remember to use a number line to check

for changes in concavity. If there are no inflection points, say so and explain why

Please show your steps thanks !

Answer 1

Hi Brian,

This is so much easier to answer if I can write on the whiteboard. Please see video