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Proof: d/dx(x^n) http://www.khanacademy.org/video/proof--d-dx-x-n ------------------------------------- يتناول هذا الفيديو مسائل حول اثبات ------------------------------------- شكر خاص لمؤسسة شركاء في التنمية المستدامة -- فلسطين http://psdpal.org