Thread: find absolute minimum and maximum

X^4-72X^2+1 ON INTERVAL [-5, 13].....FIND ABSOLUTE MINIMUM and absolute maximum


I know i need the f'

but i am struggling

any help would be appreciated!!

$\displaystyle f'(x)=4x^3-144x$

Does this help?

*Remember, $\displaystyle (x^n)'=nx^{n-1}$