👉 In mathematics, "eighthly" is a mathematical concept used in real analysis. It describes the relationship between an exponential function and its derivative. Specifically, it refers to the rate at which the value of the function changes over the interval from 0 to 1. The function f(x) = ex is an example of an exponential function with base e (eulerian number). The derivative of f(x) equals f'(x), which represents the instantaneous rate of change of the function.
