Question

Determinati cate doua exemple de multimi X astfel in cat :
a) X U {1,2} = {1,2,3};
b) X ∩ {1,2,3} = {1,2}

Answer 1

a) X = {1,3} sau {2,3} sau {3} sau {1,2,3}

b) X = {1,2,5,6} sau {1,2,7,8,10}