Algebra: Logarithm

The logarithm of a number x to a given base b is the power y to which the base must be raised to get the number x. In mathematical symbols, . This is exactly equivalent to . The logarithmic function is defined for all positive real numbers x. So, the domain of the logarithmic function is the set of all positive real numbers. Any positive real number can be the base of the logarithmic function, except of 1. For those who is familiar with the notion of a inverse function, the logarithmic function is the inverse function to the exponent function. Lessons under this topic discuss specific properties of logarithms and the logarithmic function. Examples of using logarithms to solve real world problems are given also.

Graph of logarithm y=ln(x)