Question

Va roggg la A={n €N|6<2n+4<20} Ofer COROANA☺

Answer 1

6< 2n+4 < 20          / -4
6 - 4 < 2n < 20 - 4
2 < 2n < 16            / :2
1 < n < 8      ==> A = {1, 2, 3, ... ,8}