<prompt> Chaguo za kukokotoa px, qx, na rx zote hazibadiliki. Tunawekaf q circ p circ r.Je, ni usemi upi sahihi wa f-1?A. r-1 circ q-1 circ p-1B. p-1 circ q-1 circ r-1C. r-1 circ p-1 circ q-1D. q-1 circ p-1 circ r-1E. q-1 circ r-1 circ p-1F. p-1 circ r-1 circ q-1Weka herufi ya usemi sahihi wa f-1.  <response>: Acha y fx qprx. Tukitumia q-1, tunapataq-1y prx.Kutumia p-1, tunapatap-1q-1y rx.Mwishowe, kwa kutumia r-1x, tunapatar-1p-1q-1y x.Kwa hiyo, f-1 r-1 mduara p-1 circ q-1. Jibu sahihi ni textC. 