**Logarithmic** and **natural logarithmic functions** of numbers.

The logarithmic base 10 form represents the exponent that 10 must be raised in order to obtain that specific number.

Concept #1: Logarithmic Functions

Example #1: Logarithmic Functions

Example #2: Logarithmic Functions

The inverse or anti-logarithmic function is the opposite of the logarithmic function.

Concept #2: Inverse Logarithmic Functions

The **natural logarithmic function ln **is the exponent to which e must be raised to determine that number.

Concept #3: Natural Logarithmic Functions

The similarities between logarithmic and natural logarithmic functions are outlined below.

Concept #4: Logarithmic Relationships