Question

Aflati numarul natural ce are in multimea {x €N/20 <x<25}exact 3 multipli

Answer 1

in primul rand aflam elementele multimii: x∈{21;22;23;24.} D21={1;3;7;21.} D22={1;2;11;22.} D23={1;23.} D24={1;2;3;4;6;8;12;24.} 1-4 MULTIPLI 2-2MULTIPLI 3-2 MULTIPLI 4-1 MULTIPLU 6-1 MULTIPLU 8-1 MULTIPLU 7-1 MULTIPLU 11-1 MULTIPLU 12-1 MULTIPLU 21-1 MULTIPLU 22-1 MULTIPLU 23-1MULTIPLU 24-1 MULTIPLU