Learn Before
Concept

Domain of a Logarithmic Function

The domain of a basic logarithmic function y=logaxy = \log_a x is the set of all strictly positive real numbers. Visually, the graph of the function never touches or crosses the vertical yy-axis, indicating that the input xx cannot be zero or any negative number. In standard interval notation, this domain is formally written as (0,)(0, \infty).

0

1

Updated 2026-05-26

Contributors are:

Who are from:

Tags

OpenStax

Intermediate Algebra @ OpenStax

Ch.10 Exponential and Logarithmic Functions - Intermediate Algebra @ OpenStax

Algebra

Related