英语翻译Jayesh invests $250 in a building society on the first day of each month for one complete year.The account pays interest at 3/4% for each complete month.How much does Jayesh have invested at the end of the year(but before making a thirtee

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英语翻译Jayesh invests $250 in a building society on the first day of each month for one complete year.The account pays interest at 3/4% for each complete month.How much does Jayesh have invested at the end of the year(but before making a thirtee
英语翻译
Jayesh invests $250 in a building society on the first day of each month for one complete year.The account pays interest at 3/4% for each complete month.How much does Jayesh have invested at the end of the year(but before making a thirteenth payment)?
4楼和5楼的公式是怎么得出来的呢?用这个公式算的话,第一个月的钱不对丫?

英语翻译Jayesh invests $250 in a building society on the first day of each month for one complete year.The account pays interest at 3/4% for each complete month.How much does Jayesh have invested at the end of the year(but before making a thirtee
Jayesh在一年中,每个月第一天都往建房基金投入250美金.每月回报利率为0.75% 到年底Jayesh 总共在账户上有多少钱(第十三次付款前)?
compound interest
钱= 250*1.0075*(1.0075^12 - 1)/(1.0075 - 1)
=3150.348313
要几位有效数字你自己看吧
geometric progression你总该学过吧.
就是 a ,ar ,ar^2 ,ar^3 ,ar^4……这n个数的和=a(r^n - 1)/(r - 1)
第一个月底=250*1.0075
第二个月底=(250*1.0075+250)*1.0075=250*1.0075^2+ 250*1.0075
……
第n月底=250*1.0075^n + 250*1.0075^(n-1) + ……+250*1.0075
你学过那个公式吧,geometric progression中文是什么我不知道.不过你应该知道,要不,你做这题干嘛

Jayesh在一年中,每个月第一天都往建房基金投入250美金。每月回报利率为0.75% 到年底Jayesh 总共在账户上有多少钱(第十三次付款前)?
第一个月 投入250 月底有 250+250*0.0075=251.875
第二个月 投入250 月底有 (250+251.875)+ (250+251.875)*0.0075=505.64
第三个月 投入250 月底有 (...

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Jayesh在一年中,每个月第一天都往建房基金投入250美金。每月回报利率为0.75% 到年底Jayesh 总共在账户上有多少钱(第十三次付款前)?
第一个月 投入250 月底有 250+250*0.0075=251.875
第二个月 投入250 月底有 (250+251.875)+ (250+251.875)*0.0075=505.64
第三个月 投入250 月底有 (250+505.64)+(250+505.64)*0.0075=761.31
以此类推 第12个月月底有 3156.46美金。

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选二楼

这是一道compound interest(复合利率)的精算题,翻译请根据simonsun347 的回答,解答我来回答。。
根据公式:
S=R(((1+i)^n-1)/i)(1+i)
=250(((1+0.0075)^12-1)/(0.0075))*(1.0075)
=3150.348
二楼的解答计算错误,而且没有用公式,计算起来会非常麻烦,本人现在...

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这是一道compound interest(复合利率)的精算题,翻译请根据simonsun347 的回答,解答我来回答。。
根据公式:
S=R(((1+i)^n-1)/i)(1+i)
=250(((1+0.0075)^12-1)/(0.0075))*(1.0075)
=3150.348
二楼的解答计算错误,而且没有用公式,计算起来会非常麻烦,本人现在就在加拿大留学,现在就有一门课是精算,解答绝对是正确的。。。

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Jayesh在整整一年的时间内,每个月第一天都往建房互助协会投入250美金。,每月的利率为0.75%.到年底Jayesh 总共在账户上有多少钱(第十三次给付利息前)?
key

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