Question

Trebuie sa aflu elementele mulțimi. Va rogg repedee​

Answer 1

6/2x+1€Z=>2x+1/6=>2x+1€D(divizorilor)6=>

2x+1€{1,-1,2,-2,3,-3,6,-6)/-1=>2x€{0,-2,1,-3,5,-7}/:2=>x€{0,-1,1/2,-3/2,5/2,-7/2}

dar x€Z =>A={0,-1}