Question

Fie multmultimea A={1; x; 2; 3}. Determinati valoarea lui x stiind ca AU{1; 2; 3; 4; 5; 6} = {1; 2; 3; 4; 5; 6; 7}

Answer 1

A={1,4,2,3},;{1,5,2,3},;{1,6,2,3};{1,7,2,3}

Answer 2

A=(1 4 2 3)     (1 5 2 3)    (1 6 2 3)   (1 7 2 5 )