Răspuns :
a)2/1; 2/2; 2/3 ; 2/4 ; 2/5 ;2/6
b)2/7; 3/7; 4/7; 5/7; 6/7;2/6; 3/6; 4/6; 5/6; 2/5; 3/5; 4/5; 2/4; 3/4
c)8/7;9/7; 9/8
b)2/7; 3/7; 4/7; 5/7; 6/7;2/6; 3/6; 4/6; 5/6; 2/5; 3/5; 4/5; 2/4; 3/4
c)8/7;9/7; 9/8
1. 2/7(/=supra) ; 2/6; 2/5; 2/4; 2/3; 2/2; 2/1
2. 2/3; 2/4; 2/5; 2/6; 2/7; 3/4; 3/5; 3/6; 3/7; 4/5; 4/6; 4/7; 5/6; 5/7; 6/7.
3. 9/6; 8/7; 9/8; 7/6.
2. 2/3; 2/4; 2/5; 2/6; 2/7; 3/4; 3/5; 3/6; 3/7; 4/5; 4/6; 4/7; 5/6; 5/7; 6/7.
3. 9/6; 8/7; 9/8; 7/6.