问题如下：
An investor purchase a share of stock 20 years ago and the purchase price was $15. During investment period, the stock paid no dividends, yet it has the annual compounded rate of 16%. According to these messages, now the share price is closest to:
选项：
A. $261.86.
B. $770.78.
C. $291.91.
解释：
C is correct.
N = 20; I/Y = 16; PV = -15; PMT = 0; CPT FV = $291.91
为什么这题用计算器计算不管是用bgn还是end算出的结果是一样的啊