対 数(たいすう)

たいすう

noun

logarithm

1. logarithm

The mathematical function that gives the exponent to which a base must be raised to produce a given number. Common in high-school math, science, and engineering contexts.

高校(こうこう)で対数(たいすう)を習(なら)った。

I learned about logarithms in high school.

対数(たいすう)を使(つか)うと大(おお)きな数(かず)も扱(あつか)いやすくなる。

Using logarithms makes large numbers easier to handle.

地震(じしん)のマグニチュードは対数(たいすう)で表(あらわ)されているので、数値(すうち)が1(いち)違(ちが)うとエネルギーは約(やく)30(さんじゅう)倍(ばい)になる。

Earthquake magnitudes are expressed on a logarithmic scale, so a difference of 1 means about 30 times the energy.

Composed of 対(たい) (corresponding) + 数(すう) (number).

COMMON COLLOCATIONS:

常用対数(じょうようたいすう): common logarithm (base 10)
自然対数(しぜんたいすう): natural logarithm (base e)
対数(たいすう)関数(かんすう): logarithmic function
対数(たいすう)グラフ(ぐらふ): logarithmic graph

SIMILAR WORDS:

指数(しすう): exponent — the inverse concept; the power to which a base is raised
累乗(るいじょう): power, exponentiation — the operation of raising a number to an exponent

general

Added 2026.6.5 12:07

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