(a,b)=17 => a=17m ∧ b=17n ;(m;n)=1
a+b=85
17m+17n=85
17(m+n)=85 |:17
m+n= 5
m n
0 5
1 4
2 3
3 2
2 1
5 0
1)m=0 =>a=0*17=0
n=5 =>b=5*17=85
2)m=1 =>a=1*17=17
n=4 =>b=4*17=68
3)m=2 =>a=2*17=34
n=3 =>b=3*17=51
4)m=3 =>a=3*17=51
n=2 =>b=2*17=34
5)m=4 =>a=4*17=68
n=1 =>b=1*17=17
6)m=5 =>a=5*17=85
n=0 =>b=0*17=0
S={(0;85);(17;68);(34;51);(51;34);(68;17);(85;0)}
