问题如下图：
选项：
A. 
B. 
C. 
解释：
星星_品职助教 · 2019年10月24日
同学你好，
这道题如果按照答案解析的思路，会涉及到对数，所以无法用计算器直接求，直接代入选项试错即可，A选项代入后的结果是$ 2,000,158.17，B选项代入后是$ 2,017,231.39$。相比之下还是A更贴近于$ 2 million （其实A选项的具体值应该是27.7268年，如果代入这个值，就正好是2 million了）。不过真实考试中，正常情况下不会出贴的这么近的数字的，往往都会有较大的差异。
还可以直接用计算器求解，PV=-1,000,000; FV=2,000,000; I/Y=2.5/365; PMT=0; CPT N=10120.29541天，再除以365天即可直接得到27.7268年。这样做会快捷一些。加油。
阿杰 · 2020年04月19日
按照这个年金计算，PV=-1,000,000; FV=2,000,000; I/Y=2.5/365; PMT=0; CPT N=10120.29541天，再除以365天即可直接得到27.7268年。 问题1：为什么1/Y=2.5/365，而不是I/Y=2.5，差异在哪？ 问题2：按照I/Y=2.5（the stated annual rate），计算出来的N=28.07年，应该是B，为什么会是两个答案？
NO.PZ2018062016000006 问题如下 Lubelieves thafter retirement she will neeabout $2 million totally for her ily expenses. present, she h$1million investment a stateannuinterest rate of 2.5%. Assuming compounily, how long es it take for Luto have enough money for retirement life? A.27.73 years B.28.07 years C.26.48 years A is correct.EAR=(1+0.025/365)365-1=0.02531$1million*(1+0.02531)N =$2million, N=27.73 years. EAR为什么是2.531，不是2.5，这里I/Y为什么需要转换
NO.PZ2018062016000006问题如下Lubelieves thafter retirement she will neeabout $2 million totally for her ily expenses. present, she h$1million investment a stateannuinterest rate of 2.5%. Assuming compounily, how long es it take for Luto have enough money for retirement life?A.27.73 yearsB.28.07 yearsC.26.48 yearsA is correct.EAR=(1+0.025/365)365-1=0.02531$1million*(1+0.02531)N =$2million, N=27.73 years.求问怎么用金融计算器计算～
NO.PZ2018062016000006问题如下 Lubelieves thafter retirement she will neeabout $2 million totally for her ily expenses. present, she h$1million investment a stateannuinterest rate of 2.5%. Assuming compounily, how long es it take for Luto have enough money for retirement life?A.27.73 yearsB.28.07 yearsC.26.48 yearsA is correct.EAR=(1+0.025/365)365-1=0.02531$1million*(1+0.02531)N =$2million, N=27.73 years.请问这题能用试错法计算吗，如果能的话要怎么算，谢谢
NO.PZ2018062016000006 问题如下 Lubelieves thafter retirement she will neeabout $2 million totally for her ily expenses. present, she h$1million investment a stateannuinterest rate of 2.5%. Assuming compounily, how long es it take for Luto have enough money for retirement life? A.27.73 years B.28.07 years C.26.48 years A is correct.EAR=(1+0.025/365)365-1=0.02531$1million*(1+0.02531)N =$2million, N=27.73 years. 为什么FV是-1不是1呢？
NO.PZ2018062016000006 问题如下 Lubelieves thafter retirement she will neeabout $2 million totally for her ily expenses. present, she h$1million investment a stateannuinterest rate of 2.5%. Assuming compounily, how long es it take for Luto have enough money for retirement life? A.27.73 years B.28.07 years C.26.48 years A is correct.EAR=(1+0.025/365)365-1=0.02531$1million*(1+0.02531)N =$2million, N=27.73 years. 同题目，这题我代入FV=2, PV=-1,I/Y=2.5,PMT=0，最后算出来的就是28.07，请问这个思路为什么错了呢？