what is the value of log base e
Natural logarithm
∫ f ′ ( x ) f ( x ) d x = ln ⁡ f ( x ) + C . ( \ displaystyle \ int ( ( \ frac ( f ' ( x ) ) ( f ( x ) ) ) \ , dx ) = \ ln f ( x ) + C . )
∫ f ′ ( x ) f ( x ) d x = ln ⁡ f ( x ) + C . ( \ displaystyle \ int ( ( \ frac ( f ' ( x ) ) ( f ( x ) ) ) \ , dx ) = \ ln f ( x ) + C . )