Odpowiedzi

2009-11-01T16:56:13+01:00
2009-11-01T16:58:43+01:00
(12 i 1/6 + 7 i 5/9) + (12 i 1/6 - 7 i 5/9) = 2*(12 i 1/6) = 24 i 1/3
2009-11-01T16:59:10+01:00
12 1/6+ 7 5/9= 19 + 3/18 + 10/18= 19 13/18
12 1/6 - 7 5/9= 4 3/18

19 13/18 + 4 3/18= 23 16/18= 32 8/9