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Relations and Functions http://www.khanacademy.org/video/relations-and-functions ----------------------------------------------------------- يوضح هذا الفيديو مفهومي العلاقة والاقتران ويميز بينهما ----------------------------------------------------------- شكر خاص لمؤسسة شركاء في التنمية المستدامة -- فلسطين http://psdpal.org