أصل كلمة لوغاريتم

[مصطفى م م ك ك]

أصل كلمة لوغاريتم

قليل من مدرسي الرياضيات العرب من يعرف سبب تسمية اللوغاريثم بهذا الاسم الغريب على لغتنا

ومع أنه من أصل عربي فقد استوردناه من الغرب هكذا دون إعادته لأصله الحقيقي

في زمن الخوارزمي تم التعريف بالقوّة باعتبارها تكرار لعملية الضرب لنفس العدد

5×5×5×5 = (5)أس 4 =625
سمي العدد 5 أساس وعدد مرات التكرار 4 أس وناتج العملية 625 بالقوّة الرابعة للعدد 5

سمى الخوارزمي ناتج العملية بالقوة الرابعة للعدد 5 وسمى العكس وهو إيجاد الأساس5 من العدد 625 إذا علم الأس 4

بالجذر الرابع للعدد 625 وهو العدد 5

وأما عملية إيجاد الأس 4 للناتج 625 للأساس 5 فلم يسميها الخوارزمي بل اكتفى بالإشارة إليها

وعبر جامعات الأندلس أطلق على هذه العملية اسم الخوارزمي إشارة إلى طريقته في حلها

ترجمت إلى اللغة الفرنسية لو جواريزم حيث لو تعني ال و جواريزم تعني خوارزمي

وقد ترجمت هذه الكلمة إلى العربية من جديد بكلمة لوغاريتم أو لوغاريثم بدل أن تعاد لأصلها الحقيقي ...الخواريزم أو الخوارزمي

والله ولي التوفيق

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