Question

aflati n apartine N astfel incat 18 supra n+7 sa fie : echiunitara; supraunitara;subunitara

Answer 1

18 /(n+7)
n+7 = 18
n =11 => 18/(11+7) = 18/18 fractie echiunitara

fractie supraunitara:
n+7 <18 => n<11
n= { 0; 1; 2; 3 ;4 ; 5; 6 ;7; 8; 9;10}
18/7; 18/8; 18/9;18/10;18/11....18/17

fractie subunitara
n+7>18 => n>11
n = {12;13;14... }