Răspuns :
[tex] D_{18} [/tex] = {1,2,3,6,18}
[tex] D_{20} [/tex] = {1,2,4,5,10,20}
[tex] D_{35} =[/tex] = { 1,5,7,35}
[tex] D_{20} [/tex] = {1,2,4,5,10,20}
[tex] D_{35} =[/tex] = { 1,5,7,35}
[tex]D_{18} = [-1;1;-2;2;-3;3;-6;6;-18;18] \\ D_{20}= [-1;1;-2;2;-4;4;-5;5;-10;10;-20;20] \\ D_{35}= [-1;1;-3;3;-5;5;-7;7;-35;35][/tex]