How do you find the point of inflection of a cubic function?

Related questions

• Can a point of inflection be undefined?
• Can points of inflection be extrema?
• Do points of inflection have to be differentiable?
• What do points of inflection represent on a graph?
• Find the points of inflection of the curve #y=(1+x)/(1+x^2)#?
• How do you find the points of inflection of the curve #y=e^(x^2)#?
• What is difference between critical points and inflection points?
• How do you locate the critical points of the function #f(x) = x^3 - 15x^2 + 4# and use the...
• Are the inflection points where f'(x) = zero or where the graph changes from concave up to concave down?
• How do you determine intervals on which the function is concave up or down and find the points...