What is the derivative of ln

Introduction

Derivative of In in mathematics, specifically in calculus and complex analysis, the logarithmic derivative of a function f is defined by the formula Where f ′ is the derivative of f. .


When f is a function f(x) of a real variable x, and takes real, strictly positive values, this is equal to the derivative of ln (f); or, the derivative of the natural logarithm off. This follows directly from the chain rule.