MATHEMATICS I (MATEMATİK I) - (İNGİLİZCE) Dersi Sets and Numbers soru detayı:

CEVAP:

Usually, sets are denoted by the capital letters A, B, C, etc., and elements of the sets by lower case letters a, b, c etc. If A is a set and a is an element of A we use the notation a ? A, if b is not an element of A then we write b ? A.