Estimate the domain of f(x) by sampling the expression parser across a wide range of x values.
This calculator estimates the domain of f(x) by evaluating the expression at many evenly-spaced sample points and identifying where the function produces finite results. It detects regions where the function is undefined (e.g., square roots of negatives, division by zero, logarithms of non-positive values).
Sampling approach
Evaluate f(x) at 2001 evenly-spaced points in [lo, hi] and identify where f(x) is defined
No — it is a numerical estimate based on sampling. It may miss isolated undefined points or boundaries between very close sample points.
Narrow the search range around the region of interest. The 2001 sample points will then be more densely packed.