Logarithm

Logarithms or logs are a part of mathematics. They are related to exponential functions. A logarithm tells what exponent (or power) is needed to make a certain number, so logarithms are one of the inverse operations of exponentiation (the other one being roots). Historically, they were useful in multiplying or dividing large numbers.

An example of a logarithm is ${\displaystyle \log _{2}8=3}$. In this logarithm, the base is 2, the power is 8 and the answer is 3. In this case, the exponentiation function would be:

${\displaystyle 2^{3}=2\times 2\times 2=8}$

The most common types of logarithms are common logarithms, where the base is 10, binary logarithms, where the base is 2, and natural logarithms, where the base is ${\displaystyle e}$ ${\displaystyle \approx 2.71828}$.^[1][2]

1. ↑ "The Ultimate Guide to Logarithm — Theory & Applications". Math Vault. 2016-05-08. Retrieved 2020-08-29.
2. ↑ "logarithm | Rules, Examples, & Formulas". Encyclopedia Britannica. Retrieved 2020-08-29.