Odpowiedzi

2009-09-27T23:19:29+02:00
2,1(3) = x

Szukana liczba: 1/x

x = 2,1(3) /*10
10x = 21,(3) /*10
100x = 213,(3) /-10x
90x = 192
x = 192/90 = 32/15

1/x = 15/32

Odp. 15/32
17 3 17