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A={xEN/(x+1)|5} URGENTTTTTTTTTTT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Răspuns :

A={4,9,14,19,24,29,34,39,40,49,54,59, 64, 69, 74, 79, 84, 89, 94, 99...}