Question

What are the absolute extrema of `f(x)=8x^3 - 24x + 3 in[-oo,oo]`?

Answer 1

`+-oo`

Explanation:

Since this is a cubic polynomial function, it is unbounded and so its absolute extrema are `+-oo`.

This is clear from its graph given below

graph{8x^3-24x+3 [-46.22, 46.25, -23.12, 23.14]}