Răspuns :
impare
( 2x +1) + ( 2x +3) + ( 2x + 5) = 759
6x + 9 =759
6x = 759 - 9
6x = 750
x = 750 :6 = 125
2x + 1 = 2 · 125 + 1 = 250 + 1 =251
numerele 251 ; 253 si 255
( 2x +1) + ( 2x +3) + ( 2x + 5) = 759
6x + 9 =759
6x = 759 - 9
6x = 750
x = 750 :6 = 125
2x + 1 = 2 · 125 + 1 = 250 + 1 =251
numerele 251 ; 253 si 255