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Marissa · 2022年09月12日

正负N次方

NO.PZ2017092702000015

问题如下:

The present value (PV) of an investment with the following year-end cash flows (CF) and a 12% required annual rate of return is closest to:



选项:

A.

€201,747.

B.

€203,191.

C.

€227,573.

解释:

B is correct,

as shown in the following table.



老师请问-n(负的N次方)怎样理解,怎样从正的换算?

谢谢老师

1 个答案

星星_品职助教 · 2022年09月12日

同学你好,

X^(-n)=1/(X^n),即X的负n次方等于 X的n次方 分之一。

例如,PV×(1+r)^n=FV ,移项后就是 PV=FV/ (1+r)^n,这种表述相当于PV=FV×(1+r)^(-n),即答案解析中表格使用的表述方式。


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