<prompt> Chaguo za kukokotoa fx zinatoshelezafx f left fracx 11 - 3x kulia xkwa yote x neq frac13. Find f 2.  <response>: Kuweka x 2, tunapataf2 f left -frac35 kulia 2.Kuweka x -frac35, tunapataf kushoto -frac35 kulia f kushoto frac17 kulia -frac35.Kuweka x frac17, tunapataf left frac17 kulia f2 frac17.Kuongeza milinganyo ya kwanza na ya tatu, tunapata2f2 f kushoto -frac35 kulia f kushoto frac17 kulia frac157. Kisha 2f2 - frac35 frac157, ambayo ina maana 2f2 frac9635, so f2 frac4835. 