Find the point of local maxima or local minima or local minima and the corresponding local maximum and minimum values of each of the following functions:
local max. value is 251 at x = 8 and local min. value is −5 at x = 0
‘}(x)=-3x2+24x=0
⇒ -3x(x-8)=0
⇒ x=0,8
F’’(x)=-6x+24
F’’(0)>0, 0 is the point of local min.
F’’(8)<0, 8 is the point of local max.
F(8)=251 and f(0)=-5