فرمول های مشتق (Derivative) شامل ln (لگاریتم طبیعی - Natural Logarithm)، در ریاضیات (Mathematics)
\[ {d \over {dx}}\ln x = {1 \over x} \] \[ {d \over {dx}}\ln \left( {f\left( x \right)} \right) = {{{f^\prime }\left( x \right)} \over {f\left( x \right)}} \] \[ {d \over {dx}}\ln \left( u \right) = {1 \over u}{{du} \over {dx}} \]
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Thomas' Calculus Early Transcendentals - George B. Thomas Jr., Maurice D. Weir, Joel R. Hass - 13th Edition
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