D10∩D15={1;2;5;10}∩{1;3;5}={1;5}
D6∩D0=D6∩N*=D6={1;2;3;6}
daaa , 0 se imparte exact la 1 la 2 la 3 si la 6 si parctic la orice numar naturaal . dand cât 0 si rest..0, as simple as that!!
0 se imparte la orice numar natural exceptand...0
M4⊂M2 deci M2∩M4=M4={0;4;8...}={x=4k|k∈N}
M5∩M3=M[5.3] ; cum 5si3 prime, deci prime intre ele,[5,3]=5*3=15
asadar M5∩M3=M15={0;15;30.45,....}={x=15k|k∈N}
