Răspuns:
Am facut transformari la unele nr:
-√25 = -5
-15/-3 = 15/3 = 5
√81/3 = 9/3 = 3
√1,(7) =√17-1/9 = √16/9 = 4/3
A n N → {-15/-3; √81/3}
A n Z → {-√25;-15/-3;√81/3}
A n Q → {-5/7;-√25;-15/-3;7,1;√81/3;√1,(7)}
A n R\Q → {4√3;√12}
EVERGREEN
Explicație pas cu pas:
n - intersectie