👉 In mathematics, a nonlinear function is a function that has an infinite number of local extrema (local maxima or minima) and is not differentiable at any point. A nonlinear function can be represented by a graph with multiple "humps" or "steps", which are points where the function's value changes. Nonlinear functions are essential in many fields, including physics, engineering, economics, and biology. Examples of nonlinear functions include: - Exponential functions: $f(x) =
