Question

Determinati multimile A si B care indeplinesc simultan proprietatile : a) { 1,2,3,4} reprezinta multimea formata din toate elementele multimilor A si B ; b) fiecare multime are cate doua elemente ; c) daca xapartine A , atunci x+1 apartine B

Answer 1

A= {1,3}
B={2,4}
x=1⇒ x+1=2
x=3⇒ x+1=4

Answer 2

a) A U B={1,2,3,4}
 b) cate doua elemente
   A={1,3}
   B={2,4}
   U=reunit