The logarithmic function has the basic form of. Shifting the logarithm function up or down. The function f x log b x is read as log base b of x.
The log function to the base e is called the natural logarithmic function and it is denoted by log e.
The graph of the logarithmic function y log x is shown. Here is the definition of the logarithm function. The logarithm of a positive real number x with respect to base b is the exponent by which b must be raised to yield x. But it is more common to write it this way.