…Since the usual numeral system is the decimal system, it is convenient to use logarithms with a base of 10 for practical calculations. This type of logarithm is called common logarithm, and in elementary mathematics, the base 10 is omitted and it is written as log x . In this case, according to formula (1), log10 = 1. … *Some terminology explanations that mention "common logarithm" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
… ふつうの記数法は十進法によるので,実用上の計算には10を底とする対数を用いるのが便利である。この対数を常用対数common logarithmと呼び,初等数学では底10を省略してlogxと書く。このとき公式(1)によりlog10=1となる。… ※「common logarithm」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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