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DAU COROANA ! URGENT

DAU COROANA URGENT class=

Răspuns :

-1<=2x-7<=1-1<=2x-7 deci 6<=2x, deci 3<=x, x apartine [3, infinit)2x-7<=1 deci 2x<=8, deci x<=4, x apartine (minus infinit,4]prin intersectie, x apartine [3,4]