Natural Logarithm: A logarithm with base e, where e is approximately equal to 2.71828. Written as $\ln(x)$.
Exponential Function: A function in which an independent variable appears in the exponent. Represented as $f(x) = a^x$, where \(a >0\).
Logarithmic Function: The inverse function of an exponential function, defined for positive real numbers. Represented as $f(x) = \log_b(x)$ where \(b >0\).