3.9: Derivatives of Ln, General Exponential & Log Functions; and
https://math.libretexts.org/Courses/Monroe_Community_College/MTH_210_Calculus_I_(Professor_Dean)/Chapter_3%3A_Derivatives/3.9%3A_Derivatives_of_Ln_General_Exponential_and_Log_Functions_and_Logarithmic_Differentiation
webDec 21, 2020 · Theorem: The Derivative of the Natural Logarithmic Function. If x > 0 and y = lnx ,then. dy dx = 1 x. If x ≠ 0 and y = ln | x | ,then. dy dx = 1 x. Suppose the argument of the natural log is not just x, but instead is g(x), a differentiable function.
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