ma putei ajuta va rog la ex astea?

36. este ireductibila fractia 18/55
37. n=3 => (2*3)/(3+3)=6/6
38. n=0,1,2 => 1/4, 3/5, 5/6
39. n=0,1,2,3,4,5 => 13/1, 14/4, 15/7, 16/10, 17/13, 18/16