在资金时间价值计算时,i和n给定,下列等式中正确的有( ).

这些表示式很复杂,我随意设i=10%,n=9.代入公式计算,看结果.
A、(F/A,i,n)=((1+10%)^9-1)/10%=13.5795
((P/F,i,n)*(A/P,i,n))^-1=(((1+10%)^-9)*10%/(1-(1+10%)^-9))^-1=13.5795
B、(A/P,i,n)=10%/(1-(1+10%)^-9)=0.1736
(A/F,i,n)+i=10%/((1+10%)^9-1)+10%=0.1736
C、(A/F,i,n)=10%/((1+10%)^9-1)=0.0736
(A/P,i,n)-i=10%/(1-(1+10%)^-9)-10%=0.0736
D、(F/P,i,n)=(1+10%)^9=2.3579
(A/P,i,n)/(F/A,i,n)=(10%/(1-(1+10%)^-9))/(((1+10%)^9-1)/10%)=0.0128
E、(A/P,i,n)*(F/A,i,n)=(10%/(1-(1+10%)^-9))*(((1+10%)^9-1)/10%)=2.3579
(P/F,i,n)=(1+10%)^-9=0.4241
**从以上计算结果,可知正确答案是ABC.

这个一个多项选择题，答案：ABC。