Math Definitions - Letter L


Definition of Logarithm

Definition of Logarithm

The logarithm \(\log_b(a) = \) asks the question, "What power must I raise \(b\) to so that I get \(a\)?"

For example, let's find \(\log_5(625)\).

The question is, what power must we raise \(5\) to so that we get \(625\)?

The answer is \(625 = 5 \times 5 \times 5 \times 5 = 5^4\). So, the answer is \(4\).

We say that the logarithm to the base \(5\) of \(625\) is \(4\), and write \(\log_5 (625) = 4\).


The aim of this dictionary is to provide definitions to common mathematical terms. Students learn a new math skill every week at school, sometimes just before they start a new skill, if they want to look at what a specific term means, this is where this dictionary will become handy and a go-to guide for a student


Year 1 to Year 12 students

Learning Objectives

Learn common math terms starting with letter L

Author: Subject Coach
Added on: 6th Feb 2018

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