Odpowiedź:
3/7 + ..... = 1
1 - 3/7 = 7/7 - 3/7 = 4/7
spr 3/7 + 4/7 = 7/7 = 1
3 i 5/9 + ..... = 4
4 - 3 i 5/9 = 3 i 9/9 - 3 i 5/9 = 4/9
spr 3 i 5/9 + 4/9 = 3 i 9/9 = 4
2 i 7/11 + ..... = 5
5 - 2 i 7/11 = 4 i 11/11 - 2 i 7/11 = 2 i 4/11
spr 2 i 7/11 + 2 i 4/11 = 4 i 11/11 = 5