Sets and Their Operations

الدرس ده محتاج حساب

A set is a well-defined collection of distinct objects called elements, written inside braces without repetition and in any order. The main operations are union ($\cup$, everything in either set), intersection ($\cap$, the common elements) and difference ($-$, what is left after removing the other set).

أول درسين في كل مادة مفتوحين للكل. سجّل الدخول أو اعمل حساب مجاني علشان تقرأ الدرس ده وباقي دروس المادة.