问题已解决
為什么B是對的,為什么加一?
FAILED



F/A 為計算年金終值
(F/A,9%,5)=(1+9%)^4+(1+9%)^3+(1+9%)^2+(1+9%)^1+(1+9%)^0
(F/A,9%,4)*(1+9%)=(1+9%)^4+(1+9%)^3+(1+9%)^2+(1+9%)^1
由上可見,這兩個式子之間差了(1+9%)^0,即1
所以,(F/A,9%,5)=(F/A,9%,4)*(1+9%)+(1+9%)^0=F/A,9%,4)*(1+9%)+1
2022 07/18 19:31
