Find the absolute extrema of the following functions on the given closed interval. 𝑓(𝑥) = 3𝑥 4 − 4𝑥 3 ; [−1, 2]

Find the absolute extrema of the following
functions on the given closed interval. $𝑓 (𝑥) = 3 𝑥^{4} - 4 𝑥^{3}; [- 1, 2]$

Matching exercise

Match the items on the right to the items on the left.

Step - 1

Step - 2

Step - 3

Step - 4