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Testing if a relationship is a function http://www.khanacademy.org/video/testing-if-a-relationship-is-a-function --------------------------------------------------------------------- يتناول هذا الفيديو شرح لمفهوم العلاقة ويوضح إذا ما كانت اقتراناً --------------------------------------------------------------------- شكر خاص لمؤسسة شركاء في التنمية المستدامة -- فلسطين http://psdpal.org