00:01
In this problem, we have to find the critical points of this following function.
00:07
So, function is given here, fx equal x -cube minus 14a square x.
00:16
So, a is here a non -zero number, non -zero constant.
00:24
And a is also constant.
00:27
So the critical points can be find by equating this derivative of everything, f x to 0 so f dash x is equal 0 so these values of x at which the derivative of the function is 0 called the critical points so first we'll find this f dash x that is the derivative of the function f x x is x q minus 14 a square x so f x is here x square minus 14 a square x so f equating this derivative to 0, we have 3x square minus 14a square is equal 0.
01:20
So from here, if we write it as root 3x whole square minus root 14a whole square equal 0.
01:34
So this can be written as, so this is in form of a square minus b square.
01:40
So this the formula for a a square minus b square is a minus b into a plus b...