How do you find the critical points of the function #f(x) = x / (x^2 + 4)#?
Find those points at which the derivative of
The critical points of a function are those points where its first derivative is 0, i.e. those points where the function reaches a maximum, a minimum, or a point of inflection.
In this case,
This equals 0 either when the denominator equals
So we want