Question

Determinati multimea A si B,stiind ca sunt indeplinite simultan conditiile:
a)A u B={1,2....9}
b) A\B={1,3,4}
c)B\A={5,6,7}

Answer 1

A e { 1, 2, 3, 4, 8, 9}
B e { 2, 5, 6,7, 8, 9}