Răspuns:
a) 6/1 = 6 6/2=3 6/3= 2 6/6=1
x= 1, 2, 3,6
b) 10/(2*1+1) = 10/3 nu da nr natural
10/(2*2+1)= 10/5=2 10/(2*0+1)= 10/1= 10
x= 0 si 2
c) x=0 0+5: (0+1)= 5/1= 5 solutie
x=1 1+5/1+1= 6/2= 3 solutie
x=2 2+5/2+1= 7/3 nu
x=3 3+5/3+1= 8/4=2 solutie
x=4 4+5/4+1= 9/5 nu
x=5 5+5/5+1=10/6 nu
x=0, 1, 3
