Question

am nevoie urgent de ajutor​

Answer 1

Explicație pas cu pas:

18/(2x-4)€N <=> 2x-4€D18 in N =>

2x-4€{1,2,3,6,9,18} =>

2x€{5,6,7,10,13,22} =>

x€{5/2,3,7/2,5,13/2,11}

x€N => x€{3,5,11} => A={3,5,11}