Question

Find the absolute maximum and absolute minimum values of the function f(x)=x^4−8x^2−10 on each of the indicated?
Find the absolute maximum and absolute minimum values of the function
f(x)=x^4−8x^2−10 on each of the indicated intervals.
Enter -1000 for any absolute extrema that does not exist.

a) Interval: [-3,-1]
b) Interval: [-4,1]
c) Interval: [-3,4]
Relative min for a, b, and c = -26
I have no idea what the relative max is for any of them :( -26 is not the relative max and neither is -1000
I know:
Local max = -10 at x = 0
Local min = -26 at x = -2 and x = 2

Answer 1

check the endpoints of the interval as well as the zeros of the derivative