б) A = [−2; 1] и B = (0; 3). Найти A u B A n B , .
[ обьединение множеств. A U B = {x / xєA или xєB}; ]
A U B = {-2,-1,0,1} U {1,2} = {-2;-1;0;1;2}
[ пересечение множеств. A∩B = {x / xєA и xєB}; ]
A∩B = {-2,-1,0,1} ∩ {1,2} ={1}
в) A = { 1, 2, 3, 4, 5, 6, 7, 8, 9 } и B = { 1, 3, 5, 7, 9, 11, 13, 17, 19 } .
[ разности A \ B = { x: x ∈ A и x ∉ B}; ]
A \ B = { 1, 2, 3, 4, 5, 6, 7, 8, 9 } \ { 1, 3, 5, 7, 9, 11, 13, 17, 19 }=
= {2, 4, 6, 8}
[ B \ A = { x : x ∈ B и x ∉ A }; ]
B \ A = { 1, 3, 5, 7, 9, 11, 13, 17, 19 } \ { 1, 2, 3, 4, 5, 6, 7, 8, 9 } =
= {11,13, 17, 19}
Пошаговое объяснение:
