Consider the function f x x4 4x 36x Determine the number of

Last updated: 2/5/2024

Consider the function f x x4 4x 36x Determine the number of points on the graph of y f x that have a horizontal tangent line In other words determine the number of solutions to f x 0 Determine the values of x at which f x has a horizontal tangent line Enter your answer as a comma separated list of values The order of the values does not matter Enter DNE if f x does not have any horizontal tangent lines