multimea vida ,[1],[2],[3],[4],[1,2],[1,3],[1,4],[2,3],[2,4],[3,4],[1,2,3],[1,2,4],[2,3,4],[1,3,4],[1,2,3,4]⇒submultimile multimii F;
Numarul de submultimi se afla apliucand formnula 2 la n ,unde n-numarul de elemente din multime.
n=4⇒2⁴=16[submultimi];
