Question

determinati x care apartine N ,astfel incat x+1 sa fie divizor al lui 6

Answer 1

d6=1,2,3,6
 x+1=1,2,3,6     x=0,1,2,5

Answer 2

X+1€D6=> x+1€{1,2,3,6} /-1=> x€{0,1,2,5}