Question

ajutor dauu coroniță ex 1 de la exerciții si probleme

Answer 1

a) AuB+{1,2,3,4,6}---AnB={2,4}--A-B={1,3}---b)AnB={1,9}--AuB={1,2,5,7,9,3,11}---A-B={2,5,7}----c)AnB=multime vida--AuB={2,4,6,8,10,12,14}----A-B={2,4,6,8}----d)AnB={c,d,e}---AuB={a,b,c,d,e}----A-B={a,b}

Answer 2

1. Sa se etermine multimile A∩B, A∪B, A\B stiind ca: 
a) A={1, 2, 3, 4}  si B={2, 4, 6}
   A∩B={2, 4};  A∪B={1, 2, 3, 4, 6};  A\B={1, 3}  

b) A={1, 2, 5, 7, 9}  si  B={1, 3, 9, 11}
    A∩B={1, 9};  A∪B={1, 2, 3, 5, 7, 9, 11};  A\B=Ф 

c) A={2, 4, 6, 8}  si  B=10, 12, 14}  
   A∩B=Ф;  A∪B={2, 4, 6, 8, 10, 12, 14};  A\B={2, 4, 6, 8}

d) A={a, b, c, d, e}  si  B={c, d, e}
    A∩B={c, d, e};  A∪B={a, b, c, d, e};  A\B={a, b}