Matematica · Glossario
What is Logarithm?
Definizione rapida
The exponent to which a base must be raised to produce a given number. log(100) = 2 means 10² = 100.
Spiegazione completa
A logarithm is the inverse of exponentiation. The logarithm of N to base b is the power to which b must be raised to equal N. If b^x = N, then log_b(N) = x. Common logs use base 10 (log); natural logs use base e ≈ 2.718 (ln). Logarithms compress huge ranges into manageable numbers: log(10) = 1, log(1,000,000) = 6. The Richter scale, decibels, pH, and information theory all use logarithmic scales. Logarithm properties (product → sum, power → multiplication) were used to turn multiplication into addition before calculators existed. Today they are essential in finance (CAGR), machine learning, and physics.
Calcolatori correlati
Calculators that use or explain Logarithm.
Termini correlati
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Last reviewed: June 15, 2026 • Category: Matematica