Odpowiedzi

2009-10-22T20:10:21+02:00
2009-10-22T20:10:20+02:00
2009-10-22T20:13:45+02:00
11/13 = 2/2* 11/13 = 22/26
12/13 = 2/2 * 12/13 = 24/26

22/26 < x < 24/26

np. x = 23/26
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