A(F/A,i,n)=(F/P,i,n)×(P/A,i,n)
B(F/P,i,n)=(F/P,i,n1)×(F/P,i,n2)其中n1+n2=n
C(P/F,i,n)=(P/F,i,n1)+(P/F,i,n2)其中n1+n2=n
D(P/A,i.n)=(P/F,i,n)/(A/F,i,n)
E1/(F/A,i,n)=(A/F,i,n)
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