Question

determinati numerele naturale x pentru care (x+1)|8

Ajutor........VA rog

Answer 1

x+1| 8 => x+1 apartine D8= {1,2,4,8}
x+1= 1 ; x=0
x+1=2; x=1
x+1=4; x=3
x+1=8; x=7
deci x= {0,1,3,7}