Log(x)

Definition

Logarithm (log) is an operation that tells you what exponent should be placed on a base number in order to get another number. Logarithms are used to solve equations involving exponential growth or decay.

Related terms

Exponential Function:

A function where an independent variable appears as an exponent, such as f(x) = 2^x. Logs and exponential functions are inverses of each other.

Base Number: The number being raised to some power in an exponentiation expression, such as 10 in log base 10 expressions like log(100).

Common Logarithm: Logarithms with base 10. The common logarithm of a number gives the power of 10 needed to obtain that number.