Domínio log(f(x))
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
log domínio
About this calculator
The log domain calculator helps to find the domain of the logarithmic function f(x) = log(x), where x is a real variable and f(x) > 0. The domain of a function is the set of all possible values of the variable for which the function is defined.
To calculate the domain of the logarithmic function, just find all values of x that satisfy the condition f(x) > 0. This means x must be a positive real number, i.e. x > 0.
The logarithmic function is defined only for positive real numbers, since the logarithm of a negative or zero number is not defined. Therefore, the domain of the logarithmic function is the set of all positive real numbers.
The log domain calculator is useful for mathematics and physics students who need to find the domain of logarithmic functions to solve problems of analysis and geometry.
Frequently asked questions
What is the domain of a function?
The domain of a function is the set of all possible values of the variable for which the function is defined.
When is the logarithmic function defined?
The logarithmic function is defined only for positive real numbers, i.e. x > 0.
Why is the logarithmic function not defined for negative or zero numbers?
This occurs because the logarithm of a negative or zero number is not defined.
How to use the log domain calculator?
Just insert the logarithmic function and the calculator will find the domain of the function.