{"id":6646,"date":"2025-07-15T13:34:48","date_gmt":"2025-07-15T13:34:48","guid":{"rendered":"https:\/\/functiontranslator.com\/log10\/"},"modified":"2021-02-26T08:09:48","modified_gmt":"2021-02-26T08:09:48","slug":"log10","status":"publish","type":"post","link":"https:\/\/functiontranslator.com\/fr\/log10\/","title":{"rendered":"LOG10"},"content":{"rendered":"

D\u00e9finition et Syntaxe<\/h2>\n

La fonction LOG10 permet de calculer le logarithme d\u00e9cimal (de base 10) d’un nombre sp\u00e9cifi\u00e9. Cette op\u00e9ration est largement utilis\u00e9e dans divers domaines tels que la science, la technologie et la finance, facilitant la gestion de valeurs extr\u00eamement grandes ou petites.<\/p>\n

Syntaxe dans Excel et Google Sheets :<\/p>\n

  =LOG10(nombre) <\/code> <\/pre>\n
Le terme nombre<\/code> d\u00e9signe la valeur pour laquelle le logarithme d\u00e9cimal sera calcul\u00e9. Notez que ce nombre doit \u00eatre positif, car toute valeur n\u00e9gative entra\u00eenera une erreur.<\/p>\n
Exemple d’Utilisation<\/h2>\n
Si vous souhaitez calculer le logarithme d\u00e9cimal de 100, voici comment proc\u00e9der :<\/p>\n
  =LOG10(100) <\/code> <\/pre>\n
Ceci retournera 2, car 102<\/sup> = 100.<\/p>\n
Sc\u00e9narios Pratiques<\/h2>\n
1. Mod\u00e9lisation d’une D\u00e9croissance Exponentielle<\/h2>\n
En sciences naturelles, le calcul du logarithme d\u00e9cimal est fr\u00e9quemment employ\u00e9 pour mod\u00e9liser des ph\u00e9nom\u00e8nes de d\u00e9croissance, comme la d\u00e9croissance radioactive. Pour une substance avec un nombre sp\u00e9cifi\u00e9 de jours en demi-vie, il pourrait \u00eatre utile de calculer le logarithme du taux de d\u00e9croissance apr\u00e8s un certain nombre de jours.<\/p>\n
Exemple :<\/p>\n
  =LOG10(Exp(-5.12 * Jours)) <\/code> <\/pre>\n
O\u00f9 Jours<\/code> repr\u00e9sente le nombre de jours \u00e9coul\u00e9s pour mesurer la quantit\u00e9 restante de la substance.<\/p>\n
2. Calcul Financier – Evaluation du Taux de Croissance<\/h2>\n
En finance, le logarithme est utile pour \u00e9valuer le taux de croissance annuel compos\u00e9 (CAGR). Imaginons que vous vouliez conna\u00eetre le taux de croissance d’un investissement initial de 1 000 \u20ac qui a atteint 10 000 \u20ac apr\u00e8s 10 ans.<\/p>\n
Formule :<\/p>\n
  =Taux = (LOG10(ValeurFinale \/ ValeurInitiale)) \/ NombreAnn\u00e9es <\/code> <\/pre>\n
    \n
  • ValeurInitiale<\/code> serait de 1000\u20ac.<\/li>\n
  • ValeurFinale<\/code> serait de 10000\u20ac.<\/li>\n
  • NombreAnn\u00e9es<\/code> est de 10.<\/li>\n<\/ul>\n
    Ce calcul donnera :<\/p>\n
      =Taux = (LOG10(10000 \/ 1000)) \/ 10 = 0.1 <\/code> <\/pre>\n
    Cela indique que le CAGR est de 10%.<\/p>\n","protected":false},"excerpt":{"rendered":"
    CalCule le logarithme en base\u00a010 d\u2019un nombre<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[310],"tags":[],"class_list":["post-6646","post","type-post","status-publish","format-standard","hentry","category-mathematiques-et-trigonometrie"],"acf":[],"yoast_head":"\nFonction LOG10 dans Excel : comment \u00e7a marche, exemples et syntaxe<\/title>\n<meta name=\"description\" content=\"Pr\u00e9sentation de la fonction LOG10 d\u2019Excel et Google Sheets. 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