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Scrieti elemente mulțimilor : D6 ; D15 ; D7; D9; D80; D63; D98; D 100.

Răspuns :

D6={1,2,3,6}
D15={1,3,5,15}
D7={1,7}
D9={1,9}
D80={1,2,4,5,8,10,16,20,40,80}
D63={1,3,7,9,21,63}
D98={1,2,7,14,49,98}
D100={1,2,4,5,10,20,25,50,100}