A sum of money is deposited in a bank for 2 years at an interest rate of 8% p.a. compounded yearly. If the interest earned after 2 years is $12480, find the principal.
please write steps:)
THX
f.3 maths
2008-10-10 3:39 am
回答 (1)
2008-10-14 6:04 am
✔ 最佳答案
Assume that the principal is Y,Y x ( 1 + 8%) x ( 1 + 8%) - Y = 12,480
Y x 1.1664 - Y = 12,480
0.1664 Y = 12,480
Y = 75,000
解說 : Y x 1.08 x 1.08 => 這個計算了, 兩年後計埋利息你總共有多錢
將呢個數減去本金, Y, 就可以計到利息係幾多~~
用咁樣的方法就可以列到條公式出嚟啦~
參考: Myself
收錄日期: 2021-05-01 17:07:44
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https://hk.answers.yahoo.com/question/index?qid=20081009000051KK01546