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Dintre numerele de mai jos element al multimi M5 intersectat cu M7
5. 60. 70. 7


Răspuns :

M5={5,10,15,20,25,30,35,40,45,50,55,60,65,70,...5n}
M7={7,14,21,28,35,42,49,56,63,70,...7n}
M5nM7={70}
{5,60,70}∈M5
{7,70}∈M7