A. (F/P,i,n)=(F/P,i,n1)+(F/P,i,n2) B. (F/P,i,n)=(F/P,i,n1)×(F/P,i,n2) C. (P/F,i,n)=(P/F,i,n1)+(P/F,i,n2) D. (P/F,i,n)=(P/F,i,n1)×(F/P,i,n2)