1.1. Найти множества: AB, AB, A∖B, B, C=A∆B∆A.
1.2. Найти: PB, P(B).
[b]A ∩ B[/b]={–4; –1; 1; 2} ∩ {-2; -1; 1}=[b]{–1; 1; }[/b]
[b]A∖B[/b]={–4; –1; 1; 2}\{-2; -1; 1}=[b]{-4: 2}[/b]
B\A={-2; -1; 1}\{–4; –1; 1; 2}={-2}
[b]vector{B}[/b]=U\B= {–5, –4, –3, –2, –1, 1, 2, 3, 4, 5}\{-2; -1; 1}=[b]{–5, –4, –3, 2, 3, 4, 5}[/b]
[b]A∆B[/b]=(A\В)U(B\A)={-4: 2} ∪{-2}=[b]{-4;-2;2}[/b]
(A∆B)\ A={-4;-2;2}\{–4; –1; 1; 2}={-2}
A\(A∆B)={–4; –1; 1; 2}\{-4;-2;2}={-1;1}
[b]C=(A∆B)∆A[/b]=(A∆B)\A U A\(A∆B)={-2} U{-1;1}=[b]{-2;-1;1}[/b]