Question

Se considera multimile A= ( x € N I 6 < x+ 4 < 8 , B= (x € N I 9 < x + 6 < 12 ) este egala cu a) ( 2,3 ) b) ( 2,3 ) c) ( 2,4 ) d) (3 ) e) (4)

Answer 1

A={x∈N I 6<x+4<8}
6<x+4<8 /-4
2<x<4
x∈N =>x∈{3}

B={x∈N I 9<x+6<12}
9<x+6<12 /-6
3<x<6
x∈N =>x∈{4,5}

P.S.:Nu inteleg ce iti cere exercitiul,eu ti-am aflat multimile.