緊急~複利息問題

2007-04-01 2:07 am
本金$5000
利率10%每個月結算一次
年期唔知

佢問幾時先可以拎得返$7000

咁個年期點計返出黎?



定係我解錯題~全題係咁
Peter deposits $5000 in a saving plan which offers an interest rate of 10% with interest compounded monthly. Under This plan how long can Peter get back $7000

回答 (1)

2007-04-01 3:31 am
✔ 最佳答案
10%係指年利率定月利率先
如果係N年(年利率)
5000(1+10/1200)^12N=7000
(12N)LOG(1+1/120)=LOG(7/5)
之後你識計啦
月都係用個相似GE方法


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