Ответ:
1) А={[x; c;a;b}
B={c;y;a;b;d}
C={a;b;d}
2) A∩B {a;b;c}
3) A∪B {a;b;d}
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Ответ:
1) А={[x; c;a;b}
B={c;y;a;b;d}
C={a;b;d}
2) A∩B {a;b;c}
3) A∪B {a;b;d}